Gas emissions from volcanoes occur when volatile species exsolve from magmatic and hydrothermal systems and make their way to the surface. Measurements of emitted gases therefore provide insights into volcanic processes. On 16 July 2021, we made airborne measurements of weak gas plumes emitted from four remote Alaska volcanoes: Iliamna Volcano, Mount Douglas, Mount Martin, and Mount Mageik. Integrated into a small fixed-wing aircraft, a new Imaging Differential Optical Absorption Spectroscopy (DOAS) instrument was used to map the spatial extent of SO2 plumes as they drifted downwind. Contrary to conventional Mobile DOAS instruments, which provide only a single viewing direction, the Imaging DOAS simultaneously measures SO2 column density along 48 individual viewing directions oriented in a swath above or below the aircraft. Each of the individual measurements have a comparable precision and sensitivity to those obtained by conventional instruments. Together, they provide high resolution 2D imagery of the volcanic plumes and allow calculation of limited emission rate time series information. Although zenith-facing DOAS measurements achieve greater accuracy and are performed here, the application of the Imaging DOAS in a nadir-facing setup is also discussed and compared to satellite observations made in similar geometries. Also onboard the aircraft, a suite of electrochemical and optical sensors measured the relative abundances of the six major volcanic volatile species H2O, CO2, SO2, H2S, HCl, and HF as the aircraft passed through the plumes. Mean SO2 emission rates of 90 ± 10, 20 ± 3, and 13 ± 3 t/d were measured at Iliamna Volcano, Mount Douglas, and Mount Martin, respectively. SO2 emissions were below the DOAS detection limit at Mount Mageik but CO2 and H2S could be measured with the in situ sensors. The information gleaned from these measurements was used to assess and compare activity at these volcanoes, all of which were found to be in a state of background degassing but whose emissions pointed to different source conditions ranging from mixed magmatic-hydrothermal to purely hydrothermal in character. Additional measurements at Mount Spurr, Redoubt Volcano, and Augustine Volcano failed to detect the very weak gas concentrations downwind of these persistently degassing vents.
","language":"English","publisher":"Frontiers Media","doi":"10.3389/feart.2023.1088056","usgsCitation":"Kern, C., and Kelly, P.J., 2023, Weak degassing from remote Alaska volcanoes characterized with a new airborne Imaging DOAS instrument and a suite of in situ sensors: Frontiers in Earth Science, v. 11, 1088056, 22 p., https://doi.org/10.3389/feart.2023.1088056.","productDescription":"1088056, 22 p.","ipdsId":"IP-151488","costCenters":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"links":[{"id":443636,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3389/feart.2023.1088056","text":"Publisher Index Page"},{"id":435345,"rank":0,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/P9YTK9PE","text":"USGS data release","linkHelpText":"Airborne Survey of Gas Emissions from Volcanoes in the Cook Inlet and Northern Alaska Peninsula, 2021"},{"id":419503,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Cook Inlet, northern Alaska Peninsula","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -153.93289670514363,\n 57.10588655261469\n ],\n [\n -148.93900588885816,\n 61.4818937771482\n ],\n [\n -151.74131362830832,\n 61.84262546330652\n ],\n [\n -157.7149279467277,\n 57.30831575931313\n ],\n [\n -153.93289670514363,\n 57.10588655261469\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"11","noUsgsAuthors":false,"publicationDate":"2023-05-05","publicationStatus":"PW","contributors":{"authors":[{"text":"Kern, Christoph 0000-0002-8920-5701 ckern@usgs.gov","orcid":"https://orcid.org/0000-0002-8920-5701","contributorId":3387,"corporation":false,"usgs":true,"family":"Kern","given":"Christoph","email":"ckern@usgs.gov","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":879457,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kelly, Peter J. 0000-0002-3868-1046 pkelly@usgs.gov","orcid":"https://orcid.org/0000-0002-3868-1046","contributorId":5931,"corporation":false,"usgs":true,"family":"Kelly","given":"Peter","email":"pkelly@usgs.gov","middleInitial":"J.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":879458,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70243200,"text":"sir20235029 - 2023 - 2018 Volcanic activity in Alaska—Summary of events and response of the Alaska Volcano Observatory","interactions":[],"lastModifiedDate":"2026-03-06T20:59:39.590768","indexId":"sir20235029","displayToPublicDate":"2023-05-04T09:07:16","publicationYear":"2023","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":334,"text":"Scientific Investigations Report","code":"SIR","onlineIssn":"2328-0328","printIssn":"2328-031X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2023-5029","displayTitle":"2018 Volcanic Activity in Alaska—Summary of Events and Response of the Alaska Volcano Observatory","title":"2018 Volcanic activity in Alaska—Summary of events and response of the Alaska Volcano Observatory","docAbstract":"The Alaska Volcano Observatory responded to eruptions, considerable and minor volcanic unrest, and seismic events at 15 volcanic centers in Alaska during 2018. The most notable volcanic activity came from Mount Cleveland, which had continuing intermittent dome growth and ash eruptions, and Mount Veniaminof, Great Sitkin Volcano, and Semisopochnoi Island, the three of which had minor eruptions. This report also documents landslides at Iliamna Volcano; resuspended ash from the 1912 Novarupta-Katmai eruption; anomalous seismicity and heightened degassing at Pavlof Volcano; seismic unrest at Shishaldin Volcano; long-term inflation at Westdahl volcano, Akutan Volcano, and Mount Okmok; steam plumes, anomalous seismicity, and anomalous gas measurements at Makushin Volcano; elevated seismicity at Mount Gareloi; seismic signals possibly related to icequakes at Mount Spurr; and new mud flows at Shrub mud volcano.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/sir20235029","programNote":"The Alaska Volcano Observatory is a consortium between the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys","usgsCitation":"Cameron, C.E., Orr, T.R., Dixon, J.P., Dietterich, H.R., Waythomas, C.F., Iezzi, A.M., Power, J.A., Searcy, C., Grapenthin, R., Tepp, G., Wallace, K.L., Lopez, T.M., DeGrandpre, K., and Perreault, J.M., 2023, 2018 Volcanic activity in Alaska—Summary of events and response of the Alaska Volcano Observatory: U.S. Geological Survey Scientific Investigations Report 2023–5029, 68 p., https://doi.org/10.3133/sir20235029.","productDescription":"vii, 68 p.","numberOfPages":"68","onlineOnly":"Y","ipdsId":"IP-120153","costCenters":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"links":[{"id":500890,"rank":6,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_114715.htm","text":"Mount Okmok; Mount Cleveland; Great Sitkin Volcano","linkFileType":{"id":5,"text":"html"}},{"id":500889,"rank":5,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_114714.htm","text":"Westdahl Volcano; Akutan Volcano; Makushin Volcano","linkFileType":{"id":5,"text":"html"}},{"id":500891,"rank":7,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_114716.htm","text":"Mount Gareloi; Mount Young; Semisopochnoi Volcano","linkFileType":{"id":5,"text":"html"}},{"id":500888,"rank":4,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_114713.htm","text":"Mount Katmai; Mount Veniaminof; Pavlof Volcano","linkFileType":{"id":5,"text":"html"}},{"id":500887,"rank":3,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_114712.htm","text":"Copper River Basin mud volcano; Mount Spurr; Iliamna Volcano","linkFileType":{"id":5,"text":"html"}},{"id":416689,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/sir/2023/5029/sir20235029.pdf","text":"Report","size":"37 MB","linkFileType":{"id":1,"text":"pdf"}},{"id":416688,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/sir/2023/5029/covrthb.jpg"}],"country":"United States","state":"Alaska","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -143.20429710112703,\n 61.84436890827459\n ],\n [\n -142.33675036318309,\n 63.49574116221564\n ],\n [\n -146.4768151759031,\n 64.33396122050729\n ],\n [\n -150.9682913255116,\n 63.72196346359824\n ],\n [\n -153.61485795645464,\n 62.14462676432551\n ],\n [\n -160.86271677978394,\n 57.38330531702596\n ],\n [\n -168.6376926084463,\n 54.5268905469634\n ],\n [\n -177.81831378466347,\n 52.19951793188412\n ],\n [\n -178.25757795577434,\n 51.654015133859275\n ],\n [\n -176.93978544244175,\n 51.32665962050979\n ],\n [\n -169.5601473677791,\n 52.146191529316866\n ],\n [\n -156.55792790289746,\n 54.975513752431766\n ],\n [\n -151.28675784956704,\n 57.477711052577945\n ],\n [\n -146.718410470014,\n 60.74058307242174\n ],\n [\n -143.20429710112703,\n 61.84436890827459\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","contact":"Alaska Volcano Observatory
U.S. Geological Survey
4210 University Drive
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For millennia, Inuit peoples of the Arctic and Subarctic have been challenged by the impacts of climate change on the abundance of key subsistence species. Responses to climate-induced declines in animal populations included switching to alternative food sources and/or migrating to regions of greater availability. We examine these dynamics for the Chugach Inuit (Sugpiat) people of southern coastal Alaska by synthesizing a large body of evidence from archeological sites, including radiocarbon dates and archaeofaunal assemblages, and by applying contemporary knowledge of glaciomarine ecosystems, spatial patterns of resource richness, and ocean-climate induced regime shifts in the Gulf of Alaska. We hypothesize that Chugach groups migrated from Cook Inlet and Prince William Sound to the Kenai Peninsula during periods of low sea surface temperatures (SSTs) to harvest harbor seals, which were seasonally aggregated near tidewater glaciers during pupping season, as well as piscivorous seabirds, Pacific cod, and other species that thrive under cool ocean conditions. During warming phases, the Chugach returned to Cook Inlet and Prince William Sound to fish for salmon and other species that abound during higher SSTs. Drivers of this coupled human-natural system of repeated (pulse) migration include the Pacific Decadal Oscillation (PDO), the dominant pattern of sea surface temperatures in the North Pacific that has been shown to generate step-like regime shifts in the marine food web; and coastal glaciers that structure the functioning of fiord ecosystems and support high levels of biological productivity. The culturally-constructed Chugach niche in the glaciomarine habitat of the Gulf of Alaska was based on intergenerationally transmitted ecological knowledge that enabled a resilient, mobile response to climate and resource variation.
The shallower portions of subduction zone megathrust faults host Earth’s most hazardous tsunamigenic earthquakes, yet understanding how and when they slip remains elusive because of challenges making seafloor observations. We performed Global Navigation Satellite System Acoustic seafloor geodetic surveys before and ~2.5 months after the 29 July 2021 Mw (moment magnitude) 8.2 Chignik, Alaska, earthquake and determine ~1.4 meters cumulative co- and post-seismic horizontal displacement ~60 kilometers from the megathrust front. Only for the 2011 Mw 9 Tohoku event have closer subduction zone earthquake displacements been observed. We estimate ~2 to 3 meters of megathrust afterslip shallower than 20 kilometers, a portion of the megathrust on which both inter- and co-seismic slip likely had occurred previously. Our analysis demonstrates that by 2.5 months, shallower and deeper moment had effectively equilibrated on the megathrust, suggesting that its tsunamigenic potential remains no more elevated than before the earthquake.
","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/sciadv.adf9299","usgsCitation":"Brooks, B.A., Goldberg, D.E., DeSanto, J., Ericksen, T., Webb, S., Nooner, S., Chadwell, C., Foster, J.H., Minson, S.E., Witter, R., Haeussler, P., Freymueller, J.T., Barnhart, W.D., and Nevitt, J., 2023, Rapid shallow megathrust afterslip from the 2021 M8.2 Chignik, Alaska earthquake revealed by seafloor geodesy: Science Advances, v. 9, no. 17, eadf9299, 10 p., https://doi.org/10.1126/sciadv.adf9299.","productDescription":"eadf9299, 10 p.","ipdsId":"IP-146480","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":489944,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1126/sciadv.adf9299","text":"Publisher Index Page"},{"id":482221,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","city":"Chignik","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -158.70646382510657,\n 56.37306604284683\n ],\n [\n -158.70646382510657,\n 56.06970805916828\n ],\n [\n -158.12381205677127,\n 56.06970805916828\n ],\n [\n -158.12381205677127,\n 56.37306604284683\n ],\n [\n -158.70646382510657,\n 56.37306604284683\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"9","issue":"17","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Brooks, Benjamin A. 0000-0001-7954-6281 bbrooks@usgs.gov","orcid":"https://orcid.org/0000-0001-7954-6281","contributorId":5237,"corporation":false,"usgs":true,"family":"Brooks","given":"Benjamin","email":"bbrooks@usgs.gov","middleInitial":"A.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":927781,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Goldberg, Dara Elyse 0000-0002-0923-3180","orcid":"https://orcid.org/0000-0002-0923-3180","contributorId":289891,"corporation":false,"usgs":true,"family":"Goldberg","given":"Dara","email":"","middleInitial":"Elyse","affiliations":[{"id":300,"text":"Geologic Hazards Science Center","active":true,"usgs":true}],"preferred":true,"id":927782,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"DeSanto, John","contributorId":351032,"corporation":false,"usgs":false,"family":"DeSanto","given":"John","affiliations":[{"id":6934,"text":"University of Washington","active":true,"usgs":false}],"preferred":false,"id":927783,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ericksen, Todd 0000-0001-9340-575X","orcid":"https://orcid.org/0000-0001-9340-575X","contributorId":217363,"corporation":false,"usgs":true,"family":"Ericksen","given":"Todd","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":927784,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Webb, Spahr","contributorId":247907,"corporation":false,"usgs":false,"family":"Webb","given":"Spahr","email":"","affiliations":[{"id":7171,"text":"Columbia University","active":true,"usgs":false}],"preferred":false,"id":927788,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Nooner, Scott","contributorId":224247,"corporation":false,"usgs":false,"family":"Nooner","given":"Scott","email":"","affiliations":[],"preferred":false,"id":927803,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Chadwell, C. David","contributorId":351035,"corporation":false,"usgs":false,"family":"Chadwell","given":"C. 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However, there are still questions about whether ice-free refugia were present in the Alexander Archipelago along the Southeast (SE) Alaska coast during the last glacial maximum (LGM). Numerous subfossils have been recovered from caves in SE Alaska, including American black (Ursus americanus) and brown (U. arctos) bears, which today are found in the Alexander Archipelago but are genetically distinct from mainland bear populations. Hence, these bear species offer an ideal system to investigate long-term occupation, potential refugial survival and lineage turnover. Here, we present genetic analyses based on 99 new complete mitochondrial genomes from ancient and modern brown and black bears spanning the last ~45,000 years. Black bears form two SE Alaskan subclades, one preglacial and another postglacial, that diverged >100,000 years ago. All postglacial ancient brown bears are closely related to modern brown bears in the archipelago, while a single preglacial brown bear is found in a distantly related clade. A hiatus in the bear subfossil record around the LGM and the deep split of their pre- and postglacial subclades fail to support a hypothesis of continuous occupancy in SE Alaska throughout the LGM for either species. Our results are consistent with an absence of refugia along the SE Alaska coast, but indicate that vegetation quickly expanded after deglaciation, allowing bears to recolonize the area after a short-lived LGM peak.
","language":"English","publisher":"Wiley","doi":"10.1111/mec.16960","usgsCitation":"da Silva Coelho, F.A., Gill, S., Tomlin, C.M., Papavassiliou, M., Farley, S.D., Cook, J., Sonsthagen, S.A., Sage, G.K., Heaton, T.H., Talbot, S., and Lindqvist, C., 2023, Ancient bears provide insights into Pleistocene ice age refugia in Southeast Alaska: Molecular Ecology, v. 32, no. 13, p. 3641-3656, https://doi.org/10.1111/mec.16960.","productDescription":"16 p.","startPage":"3641","endPage":"3656","ipdsId":"IP-147539","costCenters":[{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true}],"links":[{"id":443727,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/mec.16960","text":"Publisher Index Page"},{"id":432338,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n 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ssonsthagen@usgs.gov","orcid":"https://orcid.org/0000-0001-6215-5874","contributorId":3711,"corporation":false,"usgs":true,"family":"Sonsthagen","given":"Sarah","email":"ssonsthagen@usgs.gov","middleInitial":"A.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":907569,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Sage, George K.","contributorId":340803,"corporation":false,"usgs":false,"family":"Sage","given":"George","email":"","middleInitial":"K.","affiliations":[{"id":63248,"text":"Far Northwestern Institute of Art and Science","active":true,"usgs":false}],"preferred":false,"id":907570,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Heaton, Timothy H.","contributorId":340804,"corporation":false,"usgs":false,"family":"Heaton","given":"Timothy","email":"","middleInitial":"H.","affiliations":[{"id":16684,"text":"University of South Dakota","active":true,"usgs":false}],"preferred":false,"id":907571,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Talbot, Sandra L.","contributorId":340805,"corporation":false,"usgs":false,"family":"Talbot","given":"Sandra L.","affiliations":[{"id":63248,"text":"Far Northwestern Institute of Art and Science","active":true,"usgs":false}],"preferred":false,"id":907572,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Lindqvist, Charlotte","contributorId":340806,"corporation":false,"usgs":false,"family":"Lindqvist","given":"Charlotte","affiliations":[{"id":37334,"text":"University at Buffalo","active":true,"usgs":false}],"preferred":false,"id":907573,"contributorType":{"id":1,"text":"Authors"},"rank":11}]}} ,{"id":70243255,"text":"70243255 - 2023 - Kings of the North: Bridging disciplines to understand the effects of changing climate on Chinook salmon in the Arctic-Yukon-Kuskokwim Region","interactions":[],"lastModifiedDate":"2023-08-23T16:39:06.763227","indexId":"70243255","displayToPublicDate":"2023-04-24T06:33:02","publicationYear":"2023","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1657,"text":"Fisheries","onlineIssn":"1548-8446","printIssn":"0363-2415","active":true,"publicationSubtype":{"id":10}},"title":"Kings of the North: Bridging disciplines to understand the effects of changing climate on Chinook salmon in the Arctic-Yukon-Kuskokwim Region","docAbstract":"Understanding how species are responding to environmental change is a central challenge for stewards and managers of fish and wildlife who seek to maintain harvest opportunities for communities and Indigenous peoples. This is a particularly daunting but increasingly important task in remote, high-latitude regions where environmental conditions are changing rapidly and data collection is logistically difficult. The Arctic-Yukon-Kuskokwim (AYK) region encompasses the northern extent of the Chinook Salmon Oncorhynchus tshawytscha range where populations are experiencing rapid rates of environmental change across both freshwater and marine habitats due to global climate change. Climate–salmon interactions in the AYK region are a particularly pressing issue as many local communities have a deep reliance on a subsistence way of life. Here, we synthesize perspectives shared at a recent workshop on Chinook Salmon declines in the AYK region. The objectives were to discuss current understandings of climate-Chinook Salmon interactions, develop a set of outstanding questions, review available data and its limitations in addressing these questions, and describe the perspectives expressed by participants in this workshop from diverse backgrounds. We conclude by suggesting pathways forward to integrate different types of information and build relationships among communities, academic partners, and fishery management agencies.
The anticipated construction of the Liberty Development Island near Prudhoe Bay, Alaska, has created a need to understand how the island may influence sediment transport patterns and deposition on the nearby Boulder Patch ecosystem. This study uses a numerical model to characterize sediment transport pathways in Foggy Island Bay with and without the artificial island in place. We present the Delft3D-based model setup and application that yields an improved quantification and understanding of the region’s hydrodynamic, wave, and sediment transport patterns. The results for the present show mainly east-west directed, alongshore transport of silt and clay. Insertion of the planned island results in limited changes to the overall hydrodynamic and sediment transport patterns within the Bay but reverses erosional tendencies across a boulder patch, situated within a kilometer of the planned construction location, to being net depositional.
","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"The proceedings of the coastal sediments 2023","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"Coastal Sediments 2023","conferenceDate":"April 11-15, 2023","conferenceLocation":"New Orleans, LA","language":"English","publisher":"World Scientific","doi":"10.1142/9789811275135_0045","usgsCitation":"Nederhoff, C.M., Erikson, L.H., Engelstad, A.C., and Pearson, S., 2023, Numerical model characterization of sediment transport potentials pre- and post-construction of an artificial island in Foggy Island Bay, Alaska, in The proceedings of the coastal sediments 2023, New Orleans, LA, April 11-15, 2023, p. 487-496, https://doi.org/10.1142/9789811275135_0045.","productDescription":"10 p.","startPage":"487","endPage":"496","ipdsId":"IP-142502","costCenters":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":416384,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Foggy Island Bay","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -147.72875527390383,\n 70.2158827003305\n ],\n [\n -147.72875527390383,\n 70.1980805800392\n ],\n [\n -147.66538717065322,\n 70.1980805800392\n ],\n [\n -147.66538717065322,\n 70.2158827003305\n ],\n [\n -147.72875527390383,\n 70.2158827003305\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationDate":"2023-03-23","publicationStatus":"PW","contributors":{"authors":[{"text":"Nederhoff, Cornelis M. 0000-0003-0552-3428","orcid":"https://orcid.org/0000-0003-0552-3428","contributorId":265889,"corporation":false,"usgs":false,"family":"Nederhoff","given":"Cornelis","email":"","middleInitial":"M.","affiliations":[{"id":33886,"text":"Deltares USA","active":true,"usgs":false}],"preferred":true,"id":846335,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Erikson, Li H. 0000-0002-8607-7695 lerikson@usgs.gov","orcid":"https://orcid.org/0000-0002-8607-7695","contributorId":149963,"corporation":false,"usgs":true,"family":"Erikson","given":"Li","email":"lerikson@usgs.gov","middleInitial":"H.","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":846336,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Engelstad, Anita C 0000-0002-0211-4189","orcid":"https://orcid.org/0000-0002-0211-4189","contributorId":268303,"corporation":false,"usgs":true,"family":"Engelstad","given":"Anita","email":"","middleInitial":"C","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":846337,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Pearson, Stuart 0000-0002-3986-4469","orcid":"https://orcid.org/0000-0002-3986-4469","contributorId":245646,"corporation":false,"usgs":false,"family":"Pearson","given":"Stuart","email":"","affiliations":[{"id":49245,"text":"Delft University of Technology; Deltares","active":true,"usgs":false}],"preferred":false,"id":846338,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70243605,"text":"70243605 - 2023 - A conceptual workflow for projecting future riverine and coastal flood hazards to support the federal flood risk management standard","interactions":[],"lastModifiedDate":"2023-05-16T15:01:56.170564","indexId":"70243605","displayToPublicDate":"2023-04-15T10:33:54","publicationYear":"2023","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"A conceptual workflow for projecting future riverine and coastal flood hazards to support the federal flood risk management standard","docAbstract":"In 2021, the reinstatement of the Federal Flood Risk Management Standard (FFRMS) required\nfederally funded projects to recognize potential increases in flood hazards over their service lives due to climate change or local anthropogenic perturbations. Recognizing that the state of the science had advanced since the implementation guidelines for this standard were published in 2015 (WRC, 2015, Appendix H), an interagency state-of-the-science review committee\nconceptualized a workflow to guide the mapping and risk communication of projected future\nflood hazards in both riverine and coastal settings. This five-element workflow connects climate,\nhydrologic, and hydraulic models, incorporates land and water management impacts and\nongoing geomorphic changes, and can be tailored to the unique nature of different agency needs and resources. These conceptual workflows also provide a basis for a Climate-Informed Science Approach (CISA) implementation roadmap that identifies incremental steps for addressing the research and data gaps elucidated in our review. Many of these incremental steps present opportunities for interagency collaboration that would facilitate the rollout of the FFRMS in diverse riverine and coastal settings of the United States. We conduct case-study thought experiments to evaluate the implementation of the riverine and coastal workflows at three different locations in the United States: central Indiana, Galveston, Texas, and a small coastal community in western Alaska (Shaktoolik). Our thought experiments consider different project horizons, data availability, failure consequences, technical training requirements, and\ncomputational resources.","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"SEDHYD 2023","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"SEDHYD-2023, Sedimentation and Hydrologic Modeling Conference","conferenceDate":"May 8-12, 2023","conferenceLocation":"St Louis, MO","language":"English","publisher":"SEDHYD","usgsCitation":"Hecht, J.S., Marcy, D.C., Overbeck, J.R., Schmied, L., Fitzpatrick, F., Kinsman, N.E., Honeycutt, M.G., Mason, Krolak, J., Veatch, W.C., Prokopec, J.G., Pollard, H., Gellis, A.C., Sharar-Salgado, D., Clark, E., and Weaver, C.P., 2023, A conceptual workflow for projecting future riverine and coastal flood hazards to support the federal flood risk management standard, in SEDHYD 2023, St Louis, MO, May 8-12, 2023, 17 p.","productDescription":"17 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0000-0002-0857-3239","orcid":"https://orcid.org/0000-0002-0857-3239","contributorId":305382,"corporation":false,"usgs":false,"family":"Marcy","given":"Douglas","email":"","middleInitial":"C.","affiliations":[{"id":36803,"text":"NOAA","active":true,"usgs":false}],"preferred":false,"id":872583,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Overbeck, Jacquelyn R.","contributorId":181813,"corporation":false,"usgs":false,"family":"Overbeck","given":"Jacquelyn","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":872584,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Schmied, Lauren","contributorId":287429,"corporation":false,"usgs":false,"family":"Schmied","given":"Lauren","email":"","affiliations":[{"id":61582,"text":"FEMA Risk Mgmt Directorate","active":true,"usgs":false}],"preferred":false,"id":872585,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Fitzpatrick, Faith 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0000-0002-4500-2945","orcid":"https://orcid.org/0000-0002-4500-2945","contributorId":305386,"corporation":false,"usgs":false,"family":"Veatch","given":"William","email":"","middleInitial":"C.","affiliations":[{"id":13502,"text":"US Army Corps of Engineers","active":true,"usgs":false}],"preferred":false,"id":872591,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Prokopec, Julia G. 0000-0001-5937-2720","orcid":"https://orcid.org/0000-0001-5937-2720","contributorId":203463,"corporation":false,"usgs":true,"family":"Prokopec","given":"Julia","email":"","middleInitial":"G.","affiliations":[{"id":382,"text":"Michigan Water Science Center","active":true,"usgs":true}],"preferred":true,"id":872592,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Pollard, Harvie 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0000-0001-7251-1537","orcid":"https://orcid.org/0000-0001-7251-1537","contributorId":305388,"corporation":false,"usgs":false,"family":"Sharar-Salgado","given":"Daniel","email":"","affiliations":[{"id":54843,"text":"Federal Highway Administration","active":true,"usgs":false}],"preferred":false,"id":872595,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Clark, Edward","contributorId":198814,"corporation":false,"usgs":false,"family":"Clark","given":"Edward","email":"","affiliations":[],"preferred":false,"id":872596,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"Weaver, Christopher P. 0000-0003-4016-5451","orcid":"https://orcid.org/0000-0003-4016-5451","contributorId":305389,"corporation":false,"usgs":false,"family":"Weaver","given":"Christopher","email":"","middleInitial":"P.","affiliations":[{"id":13529,"text":"US Environmental Protection Agency","active":true,"usgs":false}],"preferred":false,"id":872597,"contributorType":{"id":1,"text":"Authors"},"rank":16}]}} ,{"id":70242890,"text":"70242890 - 2023 - Barrier islands and spits of northern Alaska: Decadal scale morphological change","interactions":[],"lastModifiedDate":"2023-04-26T15:27:20.116064","indexId":"70242890","displayToPublicDate":"2023-04-15T09:23:24","publicationYear":"2023","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Barrier islands and spits of northern Alaska: Decadal scale morphological change","docAbstract":"Arctic barrier islands and spits are dynamic features influenced by a variety of oceanographic, geologic, and environmental factors. Many serve as habitat and protection for native species and shelter the coast from waves and storms that can flood and erode the adjacent mainland. This paper summarizes results of a study documenting changes to barrier morphology along the North Slope coast of Alaska between the United States-Canadian border and Cape Beaufort, from 1947 to 2020. Changes considered include number of barriers, area and perimeter, shoreline length, barrier sinuosity and width, presence and number of relict terminus features, presence and coverage of tundra vegetation, barrier orientation, termini migration rates, and elevation metrics. Wave conditions are also summarized and related to changes in barrier morphology. The results of this study help to better predict future barrier evolution and prevalence along Alaska’s coast by increasing our understanding of Arctic barrier development, migration, and degradation via the evaluation of historical morphometrics.
","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"The proceedings of the coastal sediments 2023","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"Coastal Sediments 2023","conferenceDate":"Apr 11-15, 2023","conferenceLocation":"New Orleans, LA","language":"English","publisher":"World Scientific","doi":"10.1142/9789811275135_0004","usgsCitation":"Gibbs, A.E., Erikson, L.H., and Hamilton, A., 2023, Barrier islands and spits of northern Alaska: Decadal scale morphological change, in The proceedings of the coastal sediments 2023, New Orleans, LA, Apr 11-15, 2023, p. 36-43, https://doi.org/10.1142/9789811275135_0004.","productDescription":"8 p.","startPage":"36","endPage":"43","ipdsId":"IP-142955","costCenters":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":416236,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -163.42335256181659,\n 69.0995277856907\n ],\n [\n -162.87983129296867,\n 69.64048859864712\n ],\n [\n -161.91672608588226,\n 70.1528449804403\n ],\n [\n -160.5624612093187,\n 70.3363915880316\n ],\n [\n -159.516096091215,\n 70.71745022826315\n ],\n [\n -158.04400532669445,\n 70.75672901453629\n ],\n [\n -157.40466961071726,\n 70.8676811601508\n ],\n [\n -156.64743292467915,\n 71.25636424074338\n ],\n [\n -155.74445149424355,\n 71.04370814678796\n ],\n [\n -156.15430533931752,\n 70.79363973950063\n ],\n [\n -155.44986979205538,\n 70.77234882195742\n ],\n [\n -154.1965180180089,\n 70.46782572412022\n ],\n [\n -152.78851915364106,\n 70.43164835456875\n ],\n [\n -150.67327890887,\n 70.33442328699834\n ],\n [\n -149.30371661915854,\n 70.36389418289272\n ],\n [\n -147.9060578157725,\n 70.16393032923233\n ],\n [\n -146.1587058241269,\n 70.06791748849497\n ],\n [\n -144.7554641660867,\n 69.87614439971492\n ],\n [\n -143.47450950992425,\n 69.9925644467153\n ],\n [\n -141.04012909766612,\n 69.52717114277019\n ],\n [\n -140.78380081194413,\n 70.18263172457915\n ],\n [\n -145.11234255342293,\n 70.51672278288129\n ],\n [\n -151.10982675892876,\n 71.07270778847237\n ],\n [\n -155.37976387041476,\n 71.61590065290574\n ],\n [\n -157.0540200350941,\n 71.57130230096828\n ],\n [\n -159.85173502083515,\n 70.93692107832385\n ],\n [\n -162.56534263215494,\n 70.38693616436714\n ],\n [\n -164.08021682837645,\n 69.49188311703958\n ],\n [\n -164.2308587824812,\n 69.26843165216309\n ],\n [\n -163.42335256181659,\n 69.0995277856907\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationDate":"2023-03-23","publicationStatus":"PW","contributors":{"authors":[{"text":"Gibbs, Ann E. 0000-0002-0883-3774 agibbs@usgs.gov","orcid":"https://orcid.org/0000-0002-0883-3774","contributorId":2644,"corporation":false,"usgs":true,"family":"Gibbs","given":"Ann","email":"agibbs@usgs.gov","middleInitial":"E.","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":870113,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Erikson, Li H. 0000-0002-8607-7695 lerikson@usgs.gov","orcid":"https://orcid.org/0000-0002-8607-7695","contributorId":149963,"corporation":false,"usgs":true,"family":"Erikson","given":"Li","email":"lerikson@usgs.gov","middleInitial":"H.","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":870114,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hamilton, Anna I","contributorId":304304,"corporation":false,"usgs":false,"family":"Hamilton","given":"Anna I","affiliations":[{"id":63998,"text":"Former USGS volunteer","active":true,"usgs":false}],"preferred":false,"id":870115,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70255152,"text":"70255152 - 2023 - Climate change risks to freshwater subsistence fisheries in Arctic Alaska: Insights and uncertainty from broad whitefish Coregonus nasus","interactions":[],"lastModifiedDate":"2024-06-14T00:17:04.952302","indexId":"70255152","displayToPublicDate":"2023-04-10T19:10:59","publicationYear":"2023","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5686,"text":"Fisheries Magazine","active":true,"publicationSubtype":{"id":10}},"title":"Climate change risks to freshwater subsistence fisheries in Arctic Alaska: Insights and uncertainty from broad whitefish Coregonus nasus","docAbstract":"Arctic freshwater ecosystems and fish populations are largely shaped by seasonal and long-term watershed hydrology. In this paper, we hypothesize how changing air temperature and precipitation will alter freeze and thaw processes, hydrology, and instream habitat to assess potential indirect effects, such as the change to the foraging and behavioral ecology, on Arctic fishes, using Broad Whitefish Coregonus nasus as an indicator species. Climate change is expected to continue to alter hydrologic pathways, flow regimes, and, therefore, habitat suitability, connectivity, and availability for fishes. Warming and lengthening of the growing season will likely increase fish growth rates; however, the exceedance of threshold stream temperatures will likely increase physiological stress and alter life histories. We expect these changes to have mixed effects on Arctic subsistence fishes and fisheries. Management and conservation approaches focused on preserving the processes that create heterogeneity in aquatic habitats, genes, and communities will help maintain the resilience of Broad Whitefish and other important subsistence fisheries. Long-term effects are uncertain, so filling scientific knowledge gaps, such as identifying important habitats or increasing knowledge of abiotic variables in priority watersheds, is key to understanding and potentially mitigating likely impacts to Arctic fishes in a rapidly changing landscape.
The presence of taliks (perennially unfrozen zones in permafrost areas) adversely affects the thermal stability of infrastructure in cold regions, including roads. The role of heat advection on talik development and feedback on permafrost degradation has not been quantified methodically in this context. We incorporate a surface energy balance model into a coupled groundwater flow and energy transport numerical model (SUTRA-ice). The model, calibrated with long-term observations (1997–2018 on the Alaska Highway), is used to investigate and quantify the role of heat advection on talik initiation and development under a road embankment. Over the 25-year simulation period, the new model is driven by reconstructed meteorological data and has a good agreement with near surface soil temperatures. The model successfully reproduces the increasing depth to the permafrost table (mean absolute error <0.2 m), and talik development. The results demonstrate that heat advection provides an additional energy source that expedites the rate of permafrost thaw and roughly doubles the rate of permafrost table deepening, compared to purely conductive thawing. Talik initially formed and grew over time under the combined effect of water flow, snow insulation, road construction and climate warming. Talik formation creates a new thermal state under the road embankment, resulting in acceleration of underlying permafrost degradation, due to the positive feedback of heat accumulation created by trapped unfrozen water. In a changing climate, mobile water flow will play a more important role in permafrost thaw and talik development under road embankments, and is likely to significantly increase maintenance costs and reduce the long-term stability of the infrastructure.
Landsat Collection 2 (C2) U.S. Analysis Ready Data (U.S. ARD) are bundles of tiled Landsat data that make the Landsat archive easier to analyze and reduce the amount of time users spend on data processing for time-series analysis. Landsat C2 was released in 2020 and includes improvements over Landsat Collection 1 data, including better geometric accuracy, which increases the number of available C2 U.S. ARD tiles. Landsat C2 U.S. ARD are processed to the highest scientific standards.
Landsat C2 U.S. ARD are available for the conterminous United States (1982–present), Alaska (1984–present), and Hawaii (1989–93 and 1999–present) using Landsat C2 Level-1 data processed into Albers Equal-Area Conic-projected Level-2 surface reflectance and surface temperature products.
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47914 252nd Street
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Within the Gulf of Alaska, in the North Pacific Ocean, three major events - both natural and human-caused – resulted in large-scale ecosystem changes during the last 50 years.
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Scott","contributorId":304200,"corporation":false,"usgs":false,"family":"Pegau","given":"W.","email":"","middleInitial":"Scott","affiliations":[{"id":13600,"text":"Prince William Sound Science Center","active":true,"usgs":false}],"preferred":false,"id":869694,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70248495,"text":"70248495 - 2023 - The Lower Cretaceous sequence of western Alaska – demise of the Koyukuk terrane?","interactions":[],"lastModifiedDate":"2023-09-15T13:40:34.465244","indexId":"70248495","displayToPublicDate":"2023-04-01T08:29:33","publicationYear":"2023","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1168,"text":"Canadian Journal of Earth Sciences","active":true,"publicationSubtype":{"id":10}},"title":"The Lower Cretaceous sequence of western Alaska – demise of the Koyukuk terrane?","docAbstract":"Lower Cretaceous marine sedimentary rocks, deposited in shallow shelf and basin settings and unconformity-bound, are well exposed in southwest Alaska. Collections of Early Cretaceous fossils from across western Alaska show that similar and coeval Lower Cretaceous clastic rocks are widely distributed though only locally exposed. Volcanic rocks become an important part of the Lower Cretaceous sequence in the Yukon-Koyukuk basin where they have been interpreted to represent a mobile intra-oceanic island arc, the Koyukuk terrane, that collided with Arctic Alaska to form the Brooks Range orogen. The volcanic rocks are chemically unlike Aleutian arc rocks but share compositional characteristics with spatially related, mid-Cretaceous alkaline intrusive rocks. The volcanic-bearing sequence was also deposited on an angular unconformity, includes both shallow shelf and basin depositional settings, and is unconformably overlain by mid-Cretaceous clastic rocks. The volcanic rocks are therefore considered part of the Lower Cretaceous sequence now identified across western Alaska. In this interpretation, the Lower Cretaceous volcanic rocks are an initial expression of the mid-Cretaceous tectonic regime that included extensional exhumation and subsidence, crustal and upper mantle melting, and high temperature metamorphism in the hinterland of the Brooks Range orogen. The Cretaceous heating that led to hinterland crust and upper mantle change may have been caused by deep mantle disturbances in a post-subduction setting. This interpretation has implications for the timing of contractional orogenesis, the location and nature of the related continental borderland, and the tectonic setting for development of the Anguyucham and related oceanic terranes.","language":"English","publisher":"Canadian Science Publishing","doi":"10.1139/cjes-2022-0041","usgsCitation":"Hudson, T.L., Blodgett, R., and Wilson, F.H., 2023, The Lower Cretaceous sequence of western Alaska – demise of the Koyukuk terrane?: Canadian Journal of Earth Sciences, v. 60, no. 4, p. 422-441, https://doi.org/10.1139/cjes-2022-0041.","productDescription":"20 p.","startPage":"422","endPage":"441","ipdsId":"IP-126283","costCenters":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"links":[{"id":420829,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n 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0000-0003-1588-2280","orcid":"https://orcid.org/0000-0003-1588-2280","contributorId":329722,"corporation":false,"usgs":false,"family":"Hudson","given":"Travis","email":"","middleInitial":"L.","affiliations":[{"id":78701,"text":"Applied Geology, Inc.","active":true,"usgs":false}],"preferred":false,"id":883091,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Blodgett, Robert 0000-0002-7928-8670","orcid":"https://orcid.org/0000-0002-7928-8670","contributorId":244623,"corporation":false,"usgs":false,"family":"Blodgett","given":"Robert","email":"","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":883092,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wilson, Frederic H. 0000-0003-1761-6437 fwilson@usgs.gov","orcid":"https://orcid.org/0000-0003-1761-6437","contributorId":67174,"corporation":false,"usgs":true,"family":"Wilson","given":"Frederic","email":"fwilson@usgs.gov","middleInitial":"H.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":883093,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70246241,"text":"70246241 - 2023 - Rapid active thrust faulting at the northern Alaska Range front","interactions":[],"lastModifiedDate":"2023-06-28T14:06:04.047682","indexId":"70246241","displayToPublicDate":"2023-03-29T09:02:59","publicationYear":"2023","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Rapid active thrust faulting at the northern Alaska Range front","docAbstract":"Plate convergence rates strongly influence seismicity and mountain building inboard of convergent margins, but the distribution and kinematics of structures accommodating farfield convergence can be elusive. In interior Alaska, Yakutat microplate convergence drives late Pleistocene–recent right slip on the Denali fault, but westward-decreasing slip rates leave substantial residual Yakutat motion unaccounted for. Here, we show that Northern Foothills thrust slip beneath the northern Alaska Range absorbs a modern 4.4 mm/yr geodetic velocity gradient equivalent to ~78% of the 5.6 mm/yr residual Yakutat convergence along the central Denali fault. Infrared-stimulated luminescence ages of strath terrace deposits (67–4 ka; six sites) quantify Totatlanika River bedrock incision across the 1947 Mw 7.1 thrust earthquake epicentral region. Incision rates increase abruptly from <1 mm/yr to 4.8–5.6 mm/yr above the blind thrust tip near the range front. Rapid slip at 6.7 mm/yr on a steep thrust ramp beneath the northern Alaska Range front accommodates the geodetic gradient, drives rock uplift at rates matching measured incision rates, and implies that large earthquakes like the 1947 event may recur with 500–1400 yr frequency. Results illuminate focused seismogenic strain inboard of a complex convergent margin and prompt reevaluation of Alaska’s neotectonic framework.
","language":"English","publisher":"Geological Society of America","doi":"10.1130/G51049.1","usgsCitation":"Bender, A., Lease, R.O., Rittenour, T.M., and Jones, J.V., 2023, Rapid active thrust faulting at the northern Alaska Range front: Geology, v. 51, no. 6, p. 527-531, https://doi.org/10.1130/G51049.1.","productDescription":"5 p.","startPage":"527","endPage":"531","ipdsId":"IP-146057","costCenters":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"links":[{"id":444023,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"http://dx.doi.org/10.1130/g51049.1","text":"Publisher Index Page"},{"id":418586,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -160.6301808346148,\n 64.19458360416576\n ],\n [\n -160.6301808346148,\n 57.461011714876776\n ],\n [\n -135.6483845452334,\n 57.461011714876776\n ],\n [\n -135.6483845452334,\n 64.19458360416576\n ],\n [\n -160.6301808346148,\n 64.19458360416576\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"51","issue":"6","noUsgsAuthors":false,"publicationDate":"2023-03-29","publicationStatus":"PW","contributors":{"authors":[{"text":"Bender, Adrian 0000-0001-7469-1957","orcid":"https://orcid.org/0000-0001-7469-1957","contributorId":219952,"corporation":false,"usgs":true,"family":"Bender","given":"Adrian","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":876378,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lease, Richard O. 0000-0003-2582-8966 rlease@usgs.gov","orcid":"https://orcid.org/0000-0003-2582-8966","contributorId":5098,"corporation":false,"usgs":true,"family":"Lease","given":"Richard","email":"rlease@usgs.gov","middleInitial":"O.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":876379,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rittenour, Tammy M.","contributorId":140755,"corporation":false,"usgs":false,"family":"Rittenour","given":"Tammy","email":"","middleInitial":"M.","affiliations":[{"id":6682,"text":"Utah State University","active":true,"usgs":false}],"preferred":false,"id":876380,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jones, James V. III 0000-0002-6602-5935 jvjones@usgs.gov","orcid":"https://orcid.org/0000-0002-6602-5935","contributorId":201245,"corporation":false,"usgs":true,"family":"Jones","given":"James","suffix":"III","email":"jvjones@usgs.gov","middleInitial":"V.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":876381,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70275027,"text":"70275027 - 2023 - Glacial meltwater and sediment resuspension can be important sources of dissolved and total dissolvable aluminum and manganese to coastal ocean surface waters","interactions":[],"lastModifiedDate":"2026-04-13T15:08:59.583621","indexId":"70275027","displayToPublicDate":"2023-03-27T00:00:00","publicationYear":"2023","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2620,"text":"Limnology and Oceanography","active":true,"publicationSubtype":{"id":10}},"title":"Glacial meltwater and sediment resuspension can be important sources of dissolved and total dissolvable aluminum and manganese to coastal ocean surface waters","docAbstract":"The supply of aluminum (Al) and manganese (Mn) to the Gulf of Alaska from coastal sources is poorly constrained. Here, we investigate the seasonality of sources to better constrain Al and Mn cycling in the coastal Gulf of Alaska region and add to our understanding of seasonal and interannual inputs. We examine Mn and Al behavior over the shelf to distinguish between redox-induced release of dissolved trace metals (i.e., diffusion from sediments), sediment resuspension, and meltwater release. Data suggest that, prior to the onset of stratification in the spring, shelf sediment resuspension from deep mixing is an important mechanism for trace metal delivery to surface waters. As spring and summer ensue, increased meltwater discharge coupled with increased surface water temperatures result in stratification of the water column within the coastal Gulf of Alaska, and meltwater becomes a more important source of Al and Mn to the surface waters. The limited data available suggest that a redox-driven flux of Mn from shelf sediments is not as important as the meltwater flux during the summer. In addition, dissolved trace metal concentrations in meltwater-influenced plumes over the shelf exhibit conservative mixing, while particulate trace metal concentrations do not behave conservatively. This indicates that there are different physical controls (particle settling vs. mixing) on the spatial distributions of dissolved and particulate Al and Mn in coastal waters, the manifestation of which are likely highly variable and dependent on the trace metal composition of the river and the hydrodynamics governing this interaction at any given time.
","language":"English","publisher":"ASLO","doi":"10.1002/lno.12339","usgsCitation":"Michael, S.M., Crusius, J., Schroth, A.W., Campbell, R., and Resing, J., 2023, Glacial meltwater and sediment resuspension can be important sources of dissolved and total dissolvable aluminum and manganese to coastal ocean surface waters: Limnology and Oceanography, v. 68, no. 6, p. 1201-1215, https://doi.org/10.1002/lno.12339.","productDescription":"15 p.","startPage":"1201","endPage":"1215","ipdsId":"IP-139962","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":502999,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1002/lno.12339","text":"Publisher Index Page"},{"id":502746,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Gulf of Alaska","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -152.03959961442,\n 60.001866325768816\n ],\n [\n -152.03959961442,\n 56.73316460909248\n ],\n [\n -136.75282137237863,\n 56.73316460909248\n ],\n [\n -136.75282137237863,\n 60.001866325768816\n ],\n [\n -152.03959961442,\n 60.001866325768816\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"68","issue":"6","noUsgsAuthors":false,"publicationDate":"2023-03-27","publicationStatus":"PW","contributors":{"authors":[{"text":"Michael, Susanna M. 0000-0002-0675-7587","orcid":"https://orcid.org/0000-0002-0675-7587","contributorId":369835,"corporation":false,"usgs":false,"family":"Michael","given":"Susanna","middleInitial":"M.","affiliations":[{"id":87873,"text":"UW School of Oceanography (PhD student)","active":true,"usgs":false}],"preferred":false,"id":959251,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Crusius, John 0000-0003-2554-0831 jcrusius@usgs.gov","orcid":"https://orcid.org/0000-0003-2554-0831","contributorId":2155,"corporation":false,"usgs":true,"family":"Crusius","given":"John","email":"jcrusius@usgs.gov","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":959252,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schroth, Andrew W. 0000-0001-5553-3208","orcid":"https://orcid.org/0000-0001-5553-3208","contributorId":369836,"corporation":false,"usgs":false,"family":"Schroth","given":"Andrew","middleInitial":"W.","affiliations":[{"id":87874,"text":"U. Vermont Dept. of Geology","active":true,"usgs":false}],"preferred":false,"id":959253,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Campbell, Robert 0000-0002-7112-4292","orcid":"https://orcid.org/0000-0002-7112-4292","contributorId":369837,"corporation":false,"usgs":false,"family":"Campbell","given":"Robert","affiliations":[{"id":13600,"text":"Prince William Sound Science Center","active":true,"usgs":false}],"preferred":false,"id":959254,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Resing, Joseph A. 0000-0002-7334-4176","orcid":"https://orcid.org/0000-0002-7334-4176","contributorId":206625,"corporation":false,"usgs":false,"family":"Resing","given":"Joseph A.","affiliations":[{"id":37355,"text":"University of Washington; Joint Institute for the Study of the Atmosphere and the 20 Ocean; Seattle, WA","active":true,"usgs":false}],"preferred":false,"id":959255,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70241851,"text":"70241851 - 2023 - Providing a framework for seagrass mapping in United States coastal ecosystems using high spatial resolution satellite imagery","interactions":[],"lastModifiedDate":"2023-03-29T11:46:25.070962","indexId":"70241851","displayToPublicDate":"2023-03-24T06:38:33","publicationYear":"2023","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2258,"text":"Journal of Environmental Management","active":true,"publicationSubtype":{"id":10}},"title":"Providing a framework for seagrass mapping in United States coastal ecosystems using high spatial resolution satellite imagery","docAbstract":"Seagrasses have been widely recognized for their ecosystem services, but traditional seagrass monitoring approaches emphasizing ground and aerial observations are costly, time-consuming, and lack standardization across datasets. This study leveraged satellite imagery from Maxar's WorldView-2 and WorldView-3 high spatial resolution, commercial satellite platforms to provide a consistent classification approach for monitoring seagrass at eleven study areas across the continental United States, representing geographically, ecologically, and climatically diverse regions. A single satellite image was selected at each of the eleven study areas to correspond temporally to reference data representing seagrass coverage and was classified into four general classes: land, seagrass, no seagrass, and no data. Satellite-derived seagrass coverage was then compared to reference data using either balanced agreement, the Mann-Whitney U test, or the Kruskal-Wallis test, depending on the format of the reference data used for comparison. Balanced agreement ranged from 58% to 86%, with better agreement between reference- and satellite-indicated seagrass absence (specificity ranged from 88% to 100%) than between reference- and satellite-indicated seagrass presence (sensitivity ranged from 17% to 73%). Results of the Mann-Whitney U and Kruskal-Wallis tests demonstrated that satellite-indicated seagrass percentage cover had moderate to large correlations with reference-indicated seagrass percentage cover, indicative of moderate to strong agreement between datasets. Satellite classification performed best in areas of dense, continuous seagrass compared to areas of sparse, discontinuous seagrass and provided a suitable spatial representation of seagrass distribution within each study area. This study demonstrates that the same methods can be applied across scenes spanning varying seagrass bioregions, atmospheric conditions, and optical water types, which is a significant step toward developing a consistent, operational approach for mapping seagrass coverage at the national and global scales. Accompanying this manuscript are instructional videos describing the processing workflow, including data acquisition, data processing, and satellite image classification. These instructional videos may serve as a management tool to complement field- and aerial-based mapping efforts for monitoring seagrass ecosystems.
Coseismic temperature rise activates fault dynamic weakening that promotes earthquake rupture propagation. The spatial scales over which peak temperatures vary on slip surfaces are challenging to identify in the rock record. We present microstructural observations and electron backscatter diffraction data from three small-displacement hematite-coated fault mirrors (FMs) in the Wasatch fault damage zone, Utah, to evaluate relations between fault properties, strain localization, temperature rise, and weakening mechanisms during FM development. Millimeter- to cm-thick, matrix-supported, hematite-cemented breccia is cut by ∼25–200 μm-thick, texturally heterogeneous veins that form the hematite FM volume (FMV). Grain morphologies and textures vary with FMV thickness over μm to mm lengthscales. Cataclasite grades to ultracataclasite where FMV thickness is greatest. Thinner FMVs and geometric asperities are characterized by particles with subgrains, serrated grain boundaries, and(or) low-strain polygonal grains that increase in size with proximity to the FM surface. Comparison to prior hematite deformation experiments suggests FM temperatures broadly range from ≥400°C to ≥800–1100°C, compatible with observed coeval brittle and plastic deformation mechanisms, over sub-mm scales on individual slip surfaces during seismic slip. We present a model of FM development by episodic hematite precipitation, fault reactivation, and strain localization, where the thickness of hematite veins controls the width of the deforming zones during subsequent fault slip, facilitating temperature rise and thermally activated weakening. Our data document intrasample coseismic temperatures, resultant deformation and dynamic weakening mechanisms, and the length scales over which these vary on slip surfaces.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2022JB025069","usgsCitation":"McDermott, R.G., Ault, A.K., Wetzel, K.F., Evans, J.P., and Shen, F., 2023, Microscale spatial variations in coseismic temperature rise on hematite fault mirrors in the Wasatch fault damage zone: JGR Solid Earth, v. 128, no. 3, e2022JB025069, 20 p., https://doi.org/10.1029/2022JB025069.","productDescription":"e2022JB025069, 20 p.","ipdsId":"IP-142375","costCenters":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"links":[{"id":498652,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Utah","otherGeospatial":"Wasatch fault damage zone","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -112.0333,\n 41.425\n ],\n [\n -112.0333,\n 41.366667\n ],\n [\n -111.966667,\n 41.366667\n ],\n [\n -111.966667,\n 41.425\n ],\n [\n -112.0333,\n 41.425\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"128","issue":"3","noUsgsAuthors":false,"publicationDate":"2023-03-27","publicationStatus":"PW","contributors":{"authors":[{"text":"McDermott, Robert Gregory 0000-0002-2550-0322","orcid":"https://orcid.org/0000-0002-2550-0322","contributorId":360810,"corporation":false,"usgs":true,"family":"McDermott","given":"Robert","middleInitial":"Gregory","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":953856,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ault, Alexis K.","contributorId":365163,"corporation":false,"usgs":false,"family":"Ault","given":"Alexis","middleInitial":"K.","affiliations":[{"id":6682,"text":"Utah State University","active":true,"usgs":false}],"preferred":false,"id":953857,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wetzel, Kelsey F.","contributorId":365164,"corporation":false,"usgs":false,"family":"Wetzel","given":"Kelsey","middleInitial":"F.","affiliations":[{"id":6682,"text":"Utah State University","active":true,"usgs":false}],"preferred":false,"id":953858,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Evans, James P.","contributorId":365165,"corporation":false,"usgs":false,"family":"Evans","given":"James","middleInitial":"P.","affiliations":[{"id":6682,"text":"Utah State University","active":true,"usgs":false}],"preferred":false,"id":953859,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Shen, Fen-Ann","contributorId":365166,"corporation":false,"usgs":false,"family":"Shen","given":"Fen-Ann","affiliations":[{"id":6682,"text":"Utah State University","active":true,"usgs":false}],"preferred":false,"id":953860,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70240675,"text":"70240675 - 2023 - Exploring effects of vessels on walrus behaviors using telemetry, automatic identification system data and matching","interactions":[],"lastModifiedDate":"2024-09-18T16:08:26.706094","indexId":"70240675","displayToPublicDate":"2023-03-13T06:41:44","publicationYear":"2023","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1475,"text":"Ecosphere","active":true,"publicationSubtype":{"id":10}},"title":"Exploring effects of vessels on walrus behaviors using telemetry, automatic identification system data and matching","docAbstract":"Arctic marine mammals have had little exposure to vessel traffic and potential associated disturbance, but sea ice loss has increased accessibility of Arctic waters to vessels. Vessel disturbance could influence marine mammal population dynamics by altering behavioral activity budgets that affect energy balance, which in turn can affect birth and death rates. As an initial step in studying these linkages, we conducted the first comprehensive analysis to evaluate the effects of vessel exposure on Pacific walrus (Odobenus rosmarus divergens) behaviors. We obtained >120,000 h of location and behavior (foraging, in-water not foraging, and hauled out) data from 218 satellite-tagged walruses and linked them to vessel locations from the marine automatic identification system (AIS). This yielded 206 vessel-exposed walrus telemetry hours for comparison to unexposed hours, which we used to assess if vessel exposure altered walrus behavior. We developed a filter to account for misclassification of vessel exposure of telemetered walruses. Then we tested for an effect of vessel exposure on walrus behaviors using a combination of exact and propensity score-based matching to account for confounding covariates, and we conducted statistical power analyses. We did not detect an effect of vessel exposure on walrus behaviors even when statistical power was high (i.e., for foraging walruses), which may have been due to the sample size-driven need to define vessel presence within a larger than desired distance (15-km measured radius) around a walrus. Although this study did not determine at what distance vessel exposure affects walrus behaviors, it provided an upper bound on the distance at which the vessels encountered may disturb foraging walruses. When more situation-specific information is lacking, this distance could be used as a conservative buffer to maintain between vessels and areas of high use by foraging walruses. Studies on behavioral consequences of closer proximities between walruses and vessels are needed, and our assessments of misclassification rates and statistical power can be used for future studies. We demonstrated that analytical approaches such as matching, which are rarely used in wildlife studies, are particularly useful for testing hypotheses with observational data.
","language":"English","publisher":"Wiley","doi":"10.1002/ecs2.4433","usgsCitation":"Taylor, R.L., Jay, C.V., Beatty, W., Fischbach, A.S., Quakenbush, L.T., and Crawford, J.A., 2023, Exploring effects of vessels on walrus behaviors using telemetry, automatic identification system data and matching: Ecosphere, v. 14, no. 3, e4433, 16 p., https://doi.org/10.1002/ecs2.4433.","productDescription":"e4433, 16 p.","ipdsId":"IP-122838","costCenters":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"links":[{"id":444233,"rank":3,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1002/ecs2.4433","text":"Publisher Index Page"},{"id":435414,"rank":2,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/P9IO8AZJ","text":"USGS data release","linkHelpText":"Walrus Haulout and In-water Activity Levels Relative to Vessel Interactions in the Chukchi Sea, 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Applications","printIssn":"0010-5422","active":true,"publicationSubtype":{"id":10}},"title":"Nest traits and major flooding events influence nest survival of Emperor Geese while regional environmental variation linked to climate does not","docAbstract":"The reproductive ecology of geese that breed in the Arctic and subarctic is likely susceptible to the effects of climate change, which is projected to alter the environmental conditions of northern latitudes. Nest survival is an important component of productivity in geese; however, the effects of regional environmental conditions on nest survival are not well understood for some species, including the Emperor Goose (Anser canagicus), a species of conservation concern that is endemic to the Bering Sea region. We estimated nest survival and examined how indices of regional environmental conditions, nest traits (nest age, initiation date, and maximum number of eggs in the nest), and researcher disturbance influenced daily survival probability (DSP) of Emperor Goose nests using hierarchical models and 24 years of nest monitoring data (1994–2017) from the Yukon–Kuskokwim Delta (Y–K Delta) in western Alaska. Our results indicate that overall nest survival was generally high (µ = 0.766, 95% CRI: 0.655–0.849) and ranged from 0.327 (95% CRI: 0.176–0.482) in 2013 to 0.905 (95% CRI: 0.839–0.953) in 1995. We found that DSPs of nests were influenced by nest traits, negatively influenced by major tidal flooding events and by researcher disturbance, but were not influenced by regional indices of spring timing, temperature and precipitation during nesting, or fox and vole abundance on the Y–K Delta. However, the number of nests found each year was negatively related to our index of fox abundance, suggesting nests that failed as a result of fox predation may have never been discovered due to our limited nest-searching efforts during egg laying. Our results suggest that regional environmental variation had minimal influence on the nest survival of Emperor Geese, although major flooding events were important. Nevertheless, we suspect that within-year variation in local weather conditions and local abundance of predators and alternative prey may be important and should be considered in future studies.
","language":"English","publisher":"Oxford Academic","doi":"10.1093/ornithapp/duad008","usgsCitation":"Thompson, J.M., Uher-Koch, B.D., Daniels, B.L., Schmutz, J.A., and Sedinger, B.S., 2023, Nest traits and major flooding events influence nest survival of Emperor Geese while regional environmental variation linked to climate does not: Ornithological Applications, v. 125, no. 2, duad008, 14 p., https://doi.org/10.1093/ornithapp/duad008.","productDescription":"duad008, 14 p.","ipdsId":"IP-144477","costCenters":[{"id":65299,"text":"Alaska Science Center Ecosystems","active":true,"usgs":true}],"links":[{"id":444247,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"http://dx.doi.org/10.1093/ornithapp/duad008","text":"Publisher Index Page"},{"id":435417,"rank":0,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/P9891BFB","text":"USGS data release","linkHelpText":"Emperor Goose (Anser canagicus) Nest Survival Encounter History from the Yukon-Kuskokwim Delta, Alaska, 1994-2017"},{"id":416853,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Yukon-Kuskokwim Delta","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -166.0853296316241,\n 61.527680543295105\n ],\n [\n -166.0853296316241,\n 60.419454074425744\n ],\n [\n -163.581422052621,\n 60.419454074425744\n ],\n [\n -163.581422052621,\n 61.527680543295105\n ],\n [\n -166.0853296316241,\n 61.527680543295105\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"125","issue":"2","noUsgsAuthors":false,"publicationDate":"2023-03-10","publicationStatus":"PW","contributors":{"authors":[{"text":"Thompson, Jordan M.","contributorId":303133,"corporation":false,"usgs":false,"family":"Thompson","given":"Jordan","email":"","middleInitial":"M.","affiliations":[{"id":17717,"text":"University of Wisconsin-Stevens Point","active":true,"usgs":false}],"preferred":false,"id":872081,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Uher-Koch, Brian D. 0000-0002-1885-0260 buher-koch@usgs.gov","orcid":"https://orcid.org/0000-0002-1885-0260","contributorId":5117,"corporation":false,"usgs":true,"family":"Uher-Koch","given":"Brian","email":"buher-koch@usgs.gov","middleInitial":"D.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":872082,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Daniels, Bryan L.","contributorId":304964,"corporation":false,"usgs":false,"family":"Daniels","given":"Bryan","email":"","middleInitial":"L.","affiliations":[{"id":66195,"text":"Yukon Delta National Wildlife Refuge","active":true,"usgs":false}],"preferred":false,"id":872083,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Schmutz, Joel A.","contributorId":304965,"corporation":false,"usgs":false,"family":"Schmutz","given":"Joel","email":"","middleInitial":"A.","affiliations":[{"id":66196,"text":"Alaska Science Center WTEB (retired)","active":true,"usgs":false}],"preferred":false,"id":872084,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Sedinger, Benjamin S.","contributorId":304966,"corporation":false,"usgs":false,"family":"Sedinger","given":"Benjamin","email":"","middleInitial":"S.","affiliations":[{"id":33303,"text":"University of Wisconsin Stevens Point","active":true,"usgs":false}],"preferred":false,"id":872085,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70248364,"text":"70248364 - 2023 - Unrecorded tundra fires of the Arctic Slope, Alaska USA","interactions":[],"lastModifiedDate":"2023-09-08T12:15:14.635728","indexId":"70248364","displayToPublicDate":"2023-03-05T07:11:11","publicationYear":"2023","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5678,"text":"Fire","active":true,"publicationSubtype":{"id":10}},"title":"Unrecorded tundra fires of the Arctic Slope, Alaska USA","docAbstract":"