Stratigraphy of the north polar layered deposits of Mars from high-resolution topography
Patricio Becerra, Shane Byrne, Michael M. Sori, Sarah Sutton, Kenneth E. Herkenhoff
2016, Journal of Geophysical Research E: Planets (121) 1445-1471
The stratigraphy of the layered deposits of the polar regions of Mars is theorized to contain a record of recent climate change linked to insolation changes driven by variations in the planet's orbital and rotational parameters. In order to confidently link stratigraphic signals to insolation periodicities, a description of the...
Analysis of seafloor change at Breton Island, Gosier Shoals, and surrounding waters, 1869–2014, Breton National Wildlife Refuge, Louisiana
James G. Flocks, Joseph F. Terrano
2016, Open-File Report 2016-1069
Characterizing bathymetric change in coastal environments is an important component in understanding shoreline evolution, especially along barrier island platforms. Bathymetric change is a function of the regional sediment budget, long-term wave and current patterns, and episodic impact from high-energy events such as storms. Human modifications may also cause changes in...
Archive of bathymetry and backscatter data collected in 2014 nearshore Breton and Gosier Islands, Breton National Wildlife Refuge, Louisiana
Nancy T. DeWitt, Jake J. Fredericks, James G. Flocks, Jennifer L. Miselis, Stanley D. Locker, Jack L. Kindinger, Julie Bernier, Kyle W. Kelso, Billy J. Reynolds, Dana S. Wiese, Trevor Browning
2016, Data Series 1005
As part of the Barrier Island Monitoring Project, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted nearshore geophysical surveys off Breton and Gosier Islands, Louisiana, in July and August of 2014. To assist the United States Fish and Wildlife Service (USFWS) with restoration...
Baseline coastal oblique aerial photographs collected from Navarre Beach, Florida, to Breton Island, Louisiana, September 18–19, 2015
Karen L. M. Morgan
2016, Data Series 1008
The U.S. Geological Survey (USGS), as part of the National Assessment of Coastal Change Hazards project, conducts baseline and storm-response photography missions to document and understand the changes in vulnerability of the Nation's coasts to extreme storms. On September 18–19, 2015, the USGS conducted an oblique aerial photographic survey...
Future frequencies of extreme weather events in the National Wildlife Refuges of the conterminous U.S.
Sebastian Martinuzzi, Andrew J. Allstadt, Brooke L. Bateman, Patricia J. Heglund, Anna M. Pidgeon, Wayne E. Thogmartin, Stephen J. Vavrus, Volker C. Radeloff
2016, Biological Conservation (201) 327-335
Climate change is a major challenge for managers of protected areas world-wide, and managers need information about future climate conditions within protected areas. Prior studies of climate change effects in protected areas have largely focused on average climatic conditions. However, extreme weather may have stronger effects on wildlife populations and...
The international river interface cooperative: Public domain flow and morphodynamics software for education and applications
Jonathan M. Nelson, Yasuyuki Shimizu, Takaaki Abe, Kazutake Asahi, Mineyuki Gamou, Takuya Inoue, Toshiki Iwasaki, Takaharu Kakinuma, Satomi Kawamura, Ichiro Kimura, Tomoko Kyuka, Richard R. McDonald, Mohamed Nabi, Makoto Nakatsugawa, Francisco J. Simoes, Hiroshi Takebayashi, Yasunori Watanabe
2016, Advances in Water Resources (93) 62-74
This paper describes a new, public-domain interface for modeling flow, sediment transport and morphodynamics in rivers and other geophysical flows. The interface is named after the International River Interface Cooperative (iRIC), the group that constructed the interface and many of the current solvers included in iRIC. The interface is entirely...
Applications for General Purpose Command Buffers: The Emergency Conjunction Avoidance Maneuver
Robert J Scheid, Martin England
2016, Conference Paper, SpaceOps 2016 Conference
A case study is presented for the use of Relative Operation Sequence (ROS) command buffers to quickly execute a propulsive maneuver to avoid a collision with space debris. In this process, a ROS is custom-built with a burn time and magnitude, uplinked to the spacecraft, and executed in 15 percent...
Adaptive harvest management for the Svalbard population of pink‐footed geese: 2016 progress summary: Technical Report from DCE – Danish Centre for Environment and Energy, No. 86
Fred A. Johnson, Jesper Madsen
2016, Report
This document describes progress to date on the development of an adaptive harvest management strategy for maintaining the Svalbard population of pink‐footed geese (Anser brachyrhynchus) near their agreed target level (60,000) by providing for sustainable harvests in Norway and Denmark. This report provides an assessment of the most recent monitoring information...
Noncontact methods for measuring water-surface elevations and velocities in rivers: Implications for depth and discharge extraction
Jonathan M. Nelson, Paul J. Kinzel, Richard R. McDonald, Mark Schmeeckle
2016, Conference Paper, RiverFlow 2016
Recently developed optical and videographic methods for measuring water-surface properties in a noninvasive manner hold great promise for extracting river hydraulic and bathymetric information. This paper describes such a technique, concentrating on the method of infrared videog- raphy for measuring surface velocities and both acoustic (laboratory-based) and laser-scanning (field-based) techniques for...
sbtools: A package connecting R to cloud-based data for collaborative online research
Luke Winslow, Scott Chamberlain, Alison P. Appling, Jordan S. Read
2016, The R Journal (8) 387-398
The adoption of high-quality tools for collaboration and reproducible research such as R and Github is becoming more common in many research fields. While Github and other version management systems are excellent resources, they were originally designed to handle code and scale poorly to large text-based or binary datasets. A...
Land use in the Northern Great Plains region of the U.S. influences the survival and productivity of honey bee colonies
Matthew Smart, Jeff S. Pettis, Ned H. Jr. Euliss, Marla S. Spivak
2016, Agriculture, Ecosystems and Environment (230) 139-149
The Northern Great Plains region of the US annually hosts a large portion of commercially managed U.S. honey bee colonies each summer. Changing land use patterns over the last several decades have contributed to declines in the availability of bee forage across the region, and the future sustainability of the...
Carbon and energy fluxes in cropland ecosystems: a model-data comparison
E. Lokupitiya, A. Scott Denning, K. Schaefer, D. Ricciuto, R. Anderson, M. A. Arain, I. Baker, A. G. Barr, G. Chen, J.M. Chen, P. Ciais, D.R. Cook, M.C. Dietze, M. El Maayar, M. Fischer, R. Grant, D. Hollinger, C. Izaurralde, A. Jain, C.J. Kucharik, Z. Li, S. Liu, L. Li, R. Matamala, P. Peylin, D. Price, S. W. Running, A. Sahoo, M. Sprintsin, A.E. Suyker, H. Tian, Christina Tonitto, M.S. Torn, Hans Verbeeck, S.B. Verma, Y. Xue
2016, Biogeochemistry (128) 53-76
Croplands are highly productive ecosystems that contribute to land–atmosphere exchange of carbon, energy, and water during their short growing seasons. We evaluated and compared net ecosystem exchange (NEE), latent heat flux (LE), and sensible heat flux (H) simulated by a suite of ecosystem models at five agricultural eddy covariance flux...
The Mississippi River: A place for fish
Harold Schramm, Brian Ickes
Yushun Chen, Duane Chapman, John Jackson, Daqing Chen, Zhongjie Li, Jack Kilgore, Quinton E. Phelps, Michael Eggleton, editor(s)
2016, Book chapter, Fishery Resources, Environment, and Conservation in the Mississippi and Yangtze (Changjiang) River Basins
The Mississippi River flows 3,734 km from its source at Lake Itasca, Minnesota to its outlet at the Gulf of Mexico. Along its course, it collects water from portions of two Canadian provinces and 41 % of the conterminous United States. Although greatly altered for navigation and flood control throughout...
Transmission of influenza reflects seasonality of wild birds across the annual cycle
Nichola J. Hill, Brandt W. Meixell, Eric J. Ma, Mark S. Lindberg, Walter M. Boyce, Jonathan A. Runstadler
2016, Ecology Letters (19) 915-925
Influenza A Viruses (IAV) in nature must overcome shifting transmission barriers caused by the mobility of their primary host, migratory wild birds, that change throughout the annual cycle. Using a phylogenetic network of viral sequences from North American wild birds (2008–2011) we demonstrate a shift from intraspecific to interspecific transmission...
The road to NHDPlus — Advancements in digital stream networks and associated catchments
Richard B. Moore, Thomas A. Dewald
2016, Journal of the American Water Resources Association (52) 890-900
A progression of advancements in Geographic Information Systems techniques for hydrologic network and associated catchment delineation has led to the production of the National Hydrography Dataset Plus (NHDPlus). NHDPlus is a digital stream network for hydrologic modeling with catchments and a suite of related geospatial data. Digital stream networks with...
Overwintering strategies of migratory birds: a novel approach for estimating seasonal movement patterns of residents and transients
Viviana Ruiz-Gutierrez, William L. Kendall, James F. Saracco, Gary C. White
2016, Journal of Applied Ecology (53) 1035-1045
Our understanding of movement patterns in wildlife populations has played an important role in current ecological knowledge and can inform landscape conservation decisions. Direct measures of movement can be obtained using marked individuals, but this requires tracking individuals across a landscape or multiple sites.We demonstrate how movements...
Urban base flow with low impact development
Aditi Bhaskar, Dianna M. Hogan, Stacey A. Archfield
2016, Hydrological Processes (30) 3156-3171
A novel form of urbanization, low impact development (LID), aims to engineer systems that replicate natural hydrologic functioning, in part by infiltrating stormwater close to the impervious surfaces that generate it. We sought to statistically evaluate changes in a base flow regime because of urbanization with LID, specifically changes in...
Insights into plant water uptake from xylem-water isotope measurements in two tropical catchments with contrasting moisture conditions
Jaivime Evaristo, Jeffrey J. McDonnell, Martha A. Scholl, L. Adrian Bruijnzeel, Kwok P. Chun
2016, Hydrological Processes (30) 3210-3227
Water transpired by trees has long been assumed to be sourced from the same subsurface water stocks that contribute to groundwater recharge and streamflow. However, recent investigations using dual water stable isotopes have shown an apparent ecohydrological separation between tree-transpired water and stream water. Here we present evidence for such...
Damage and recovery assessment of the Philippines' mangroves following Super Typhoon Haiyan
Jordan Long, Chandra Giri, Jurgene H. Primavera, Mandar Trivedi
2016, Marine Pollution Bulletin (109) 734-743
We quantified mangrove disturbance resulting from Super Typhoon Haiyan using a remote sensing approach. Mangrove areas were mapped prior to Haiyan using 30 m Landsat imagery and a supervised decision-tree classification. A time sequence of 250 m eMODIS data was used to monitor mangrove condition prior to, and following, Haiyan. Based on...
Spawning and hatching of endangered Gila Chub in captivity
Andrew A. Schultz, Scott A. Bonar
2016, North American Journal of Aquaculture (78) 279-283
Information on reproductive characteristics of the endangered Gila Chub Gila intermedia is largely limited and qualitative, and culture techniques and requirements are virtually unknown. Here we provide the first published data on spawning and selected reproductive and developmental characteristics of Gila Chub. Fish were brought to the laboratory in March...
Does resolution of flow field observation influence apparent habitat use and energy expenditure in juvenile coho salmon?
Desiree D. Tullos, Cara Walter, Jason B. Dunham
2016, Water Resources Research (52) 5938-5950
This study investigated how the resolution of observation influences interpretation of how fish, juvenile Coho Salmon (Oncorhynchus kisutch), exploit the hydraulic environment in streams. Our objectives were to evaluate how spatial resolution of the flow field observation influenced: (1) the velocities considered to be representative of habitat units; (2) patterns...
Observations and modeling of fjord sedimentation during the 30 year retreat of Columbia Glacier, AK
Katherine B Love, Bernard Hallet, Thomas L. Pratt, Shad O’Neel
2016, Journal of Glaciology (62) 778-793
To explore links between glacier dynamics, sediment yields and the accumulation of glacial sediments in a temperate setting, we use extensive glaciological observations for Columbia Glacier, Alaska, and new oceanographic data from the fjord exposed during its retreat. High-resolution seismic data indicate that 3.2 × 108 m3 of...
Origin of the pulse-like signature of shallow long-period volcano seismicity
Bernard A. Chouet, Phillip B. Dawson
2016, Journal of Geophysical Research B: Solid Earth (121) 5931-5941
Short-duration, pulse-like long-period (LP) events are a characteristic type of seismicity accompanying eruptive activity at Mount Etna in Italy in 2004 and 2008 and at Turrialba Volcano in Costa Rica and Ubinas Volcano in Peru in 2009. We use the discrete wave number method to compute the free surface response...
Responses of a tall building in Los Angeles, California as inferred from local and distant earthquakes
Mehmet Çelebi, Hasan Ulusoy, Nori Nakata
2016, Earthquake Spectra (32) 1821-1843
Increasing inventory of tall buildings in the United States and elsewhere may be subjected to motions generated by near and far seismic sources that cause long-period effects. Multiple sets of records that exhibited such effects were retrieved from tall buildings in Tokyo and Osaka ~ 350 km and 770 km...
Coseismic slip and early afterslip of the 2015 Illapel, Chile, earthquake: Implications for frictional heterogeneity and coastal uplift
William D. Barnhart, Jessica R. Murray, Richard W. Briggs, Francisco Gomez, Charles P. J. Miles, Jerry L. Svarc, Sebástian Riquelme, Bryan J. Stressler
2016, Journal of Geophysical Research B: Solid Earth (121) 6172-6191
Great subduction earthquakes are thought to rupture portions of the megathrust, where interseismic coupling is high and velocity-weakening frictional behavior is dominant, releasing elastic deformation accrued over a seismic cycle. Conversely, postseismic afterslip is assumed to occur primarily in regions of velocity-strengthening frictional characteristics that may correlate with lower interseismic...
