Understanding processes controlling sediment transports at the mouth of a highly energetic inlet system (San Francisco Bay, CA)
Edwin P.L. Elias, Jeff E. Hansen
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 207-220
San Francisco Bay is one of the largest estuaries along the U.S. West Coast and is linked to the Pacific Ocean through the Golden Gate, a 100 m deep bedrock inlet. A coupled wave, flow and sediment transport model is used to quantify the sediment linkages between San Francisco Bay,...
Atmospheric deposition and critical loads for nitrogen and metals in Arctic Alaska: Review and current status
Greg L. Linder, William G. Brumbaugh, Peter Neitlich, Edward Little
2013, Open Journal of Air Pollution (2) 76-99
To protect important resources under their bureau’s purview, the United States National Park Service’s (NPS) Arctic Network (ARCN) has developed a series of “vital signs” that are to be periodically monitored. One of these vital signs focuses on wet and dry deposition of atmospheric chemicals and further, the establishment of...
Coastal processes influencing water quality at Great Lakes beaches
Water Resources Division, U.S. Geological Survey
2013, Fact Sheet 2013-3070
In a series of studies along the Great Lakes, U.S. Geological Survey scientists are examining the physical processes that influence concentrations of fecal indicator bacteria and related pathogens at recreational beaches. These studies aim to estimate human health risk, improve management strategies, and understand the fate and transport of microbes...
Research on pathogens at Great Lakes beaches: sampling, influential factors, and potential sources
Water Resources Division, U.S. Geological Survey
2013, Fact Sheet 2013-3071
The overall mission of this work is to provide science-based information and methods that will allow beach managers to more accurately make beach closure and advisory decisions, understand the sources and physical processes affecting beach contaminants, and understand how science-based information can be used to mitigate and restore beaches and...
Real-time assessments of water quality: expanding nowcasting throughout the Great Lakes
Water Resources Division, U.S. Geological Survey
2013, Fact Sheet 2013-3069
Nowcasts are systems that inform the public of current bacterial water-quality conditions at beaches on the basis of predictive models. During 2010–12, the U.S. Geological Survey (USGS) worked with 23 local and State agencies to improve existing operational beach nowcast systems at 4 beaches and expand the use of predictive...
Tools for beach health data management, data processing, and predictive model implementation
Water Resources Division, U.S. Geological Survey
2013, Fact Sheet 2013-3068
This fact sheet describes utilities created for management of recreational waters to provide efficient data management, data aggregation, and predictive modeling as well as a prototype geographic information system (GIS)-based tool for data visualization and summary. All of these utilities were developed to assist beach managers in making decisions to...
Sand sources and transport pathways for the San Francisco Bay coastal system, based on X-ray diffraction mineralogy
James R. Hein, Kira Mizell, Patrick L. Barnard
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 154-169
The mineralogical compositions of 119 samples collected from throughout the San Francisco Bay coastal system, including bayfloor and seafloor, area beaches, cliff outcrops, and major drainages, were determined using X-ray diffraction (XRD). Comparison of the mineral concentrations and application of statistical cluster analysis of XRD spectra allowed for the determination...
Scientific results of the Second Gas Hydrate Drilling Expedition in the Ulleung Basin (UBGH2)
Byong-Jae Ryu, Timothy S. Collett, Michael Riedel, Gil-Young Kim, Jong-Hwa Chun, Jang-Jun Bahk, Joo Yong Lee, Ji-Hoon Kim, Dong-Geun Yoo
2013, Marine and Petroleum Geology (47) 1-20
As a part of Korean National Gas Hydrate Program, the Second Ulleung Basin Gas Hydrate Drilling Expedition (UBGH2) was conducted from 9 July to 30 September, 2010 in the Ulleung Basin, East Sea, offshore Korea using the D/V Fugro Synergy. The UBGH2 was performed to understand the distribution of gas...
Scale-dependent gas hydrate saturation estimates in sand reservoirs in the Ulleung Basin, East Sea of Korea
Myung Woong Lee, Timothy S. Collett
2013, Marine and Petroleum Geology (47) 195-203
Through the use of 2-D and 3-D seismic data, several gas hydrate prospects were identified in the Ulleung Basin, East Sea of Korea and thirteen drill sites were established and logging-while-drilling (LWD) data were acquired from each site in 2010. Sites UBGH2–6 and UBGH2–10 were selected to test a series...
Forest ecosystems: Vegetation, disturbance, and economics
Jeremy S. Littell, Jeffrey A. Hicke, Sarah L. Shafer, Susan M. Capalbo, Laurie L. Houston, Patty Glick
2013, Book chapter, Climate change in the northwest: Implications for our landscapes, waters, and communities
Forests cover about 47% of the Northwest (NW–Washington, Oregon, and Idaho) (Smith et al. 2009, fig. 5.1, table 5.1). The impacts of current and future climate change on NW forest ecosystems are a product of the sensitivities of ecosystem processes to climate and the degree to which humans depend on...
A Sr-Nd isotopic study of sand-sized sediment provenance and transport for the San Francisco Bay coastal system
Robert J. Rosenbauer, Amy C. Foxgrover, James R. Hein, Peter W. Swarzenski
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 143-153
A diverse suite of geochemical tracers, including 87Sr/86Sr and 143Nd/144Nd isotope ratios, the rare earth elements (REEs), and select trace elements were used to determine sand-sized sediment provenance and transport pathways within the San Francisco Bay coastal system. This study complements a large interdisciplinary effort (Barnard et al., 2012) that...
Early and late Holocene glacial fluctuations and tephrostratigraphy, Cabin Lake, Alaska
Paul D. Zander, Darrell S. Kaufman, Stephen C. Kuehn, Kristi L. Wallace, R. Scott Anderson
2013, Journal of Quaternary (28) 761-771
Marked changes in sediment types deposited in Cabin Lake, near Cordova, Alaska, represent environmental shifts during the early and late Holocene, including fluctuations in the terminal position of Sheridan Glacier. Cabin Lake is situated to receive meltwater during periods when the outwash plain of the advancing Sheridan Glacier had aggraded....
Adjustment of the San Francisco estuary and watershed to decreasing sediment supply in the 20th century
David H. Schoellhamer, Scott Wright, Judith Z. Drexler
2013, Marine Geology (345) 63-71
The general progression of human land use is an initial disturbance (e.g., deforestation, mining, agricultural expansion, overgrazing, and urbanization) that creates a sediment pulse to an estuary followed by dams that reduce sediment supply. We present a conceptual model of the effects of increasing followed by decreasing sediment supply that...
Microbial source tracking as a tool for TMDL development, Little Blue River in Independence, Missouri
Eric D. Christensen, Rebecca N. Bushon, Amie M. G. Brady
2013, Book, Proceedings of the Water Environment Federation
The Little Blue River in Jackson County, Missouri has been listed by the Missouri Department of Natural Resources as impaired by bacteria for the protection of aquatic life and contact recreation from urban point and nonpoint sources. The Clean Water Act requires that a total maximum daily load (TMDL) for...
The use of modeling and suspended sediment concentration measurements for quantifying net suspended sediment transport through a large tidally dominated inlet
Li H. Erikson, Scott Wright, Edwin Elias, Daniel M. Hanes, David H. Schoellhamer, John Largier
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 96-112
Sediment exchange at large energetic inlets is often difficult to quantify due complex flows, massive amounts of water and sediment exchange, and environmental conditions limiting long-term data collection. In an effort to better quantify such exchange this study investigated the use of suspended sediment concentrations (SSC) measured at an offsite...
Large-scale depositional characteristics of the Ulleung Basin and its impact on electrical resistivity and Archie-parameters for gas hydrate saturation estimates
Michael Riedel, Timothy S. Collett, H.-S. Kim, J.-J. Bahk, J.-H. Kim, B.-J. Ryu, G.-Y. Kim
2013, Marine and Petroleum Geology (47) 222-235
Gas hydrate saturation estimates were obtained from an Archie-analysis of the Logging-While-Drilling (LWD) electrical resistivity logs under consideration of the regional geological framework of sediment deposition in the Ulleung Basin, East Sea, of Korea. Porosity was determined from the LWD bulk density log and core-derived values of grain density. In...
Adaptive harvest management for the Svalbard population of pink-footed geese: assessment for the 2013-2015 hunting seasons
Fred A. Johnson, Jesper Madsen
2013, Technical Report from DCE - Danish Centre for Environment and Energy 28
This report describes progress on the development of an adaptive harvestmanagement strategy for maintaining the Svalbard population of pink-footed geese near their agreed target level (60,000) by providing for sustainable harvests in Norway and Denmark. Specifically, this report provides an optimal harvest quota for the 2013-2015 hunting seasons and describes...
Neutron absorption constraints on the composition of 4 Vesta
Thomas H. Prettyman, David W. Mittlefehldt, Naoyuki Yamashita, Andrew W. Beck, William C. Feldman, John S. Hendricks, David J. Lawrence, Timothy J. McCoy, Harry Y. McSween, Patrick N. Paplowski, Robert C. Reedy, Michael J. Toplis, Lucille Le Corre, Hugau Mizzon, Vishnu Reddy, Timothy N. Titus, Carol A. Raymond, Christopher T. Russell
2013, Meteoritics and Planetary Science (48) 2211-2236
Global maps of the macroscopic thermal neutron absorption cross section of Vesta's regolith by the Gamma Ray and Neutron Detector (GRaND) on board the NASA Dawn spacecraft provide constraints on the abundance and distribution of Fe, Ca, Al, Mg, and other rock-forming elements. From a circular, polar low-altitude mapping orbit,...
Sub-tidal benthic habitats of central San Francisco Bay and offshore Golden Gate area: A review
H. Gary Greene, Charles Endris, Tracy Vallier, Nadine E. Golden, Jeffery Cross, Holly F. Ryan, Bryan Dieter, Eric Niven
P.L. Barnard, B.E. Jaffe, D. H. Schoellhamer, editor(s)
2013, Marine Geology (345) 31-46
Deep-water potential estuarine and marine benthic habitat types were defined from a variety of new and interpreted data sets in central San Francisco Bay and offshore Golden Gate area including multibeam echosounder (MBES), side-scan sonar and bottom grab samples. Potential estuarine benthic habitats identified for the first time range from...
A step decrease in sediment concentration in a highly modified tidal river delta following the 1983 El Niño floods
Erin L. Hestir, David H. Schoellhamer, Tara Morgan-King, Susan L. Ustin
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 304-313
Anthropogenic activities in watersheds can have profound effects on sediment transport through river systems to estuaries. Disturbance in a watershed combined with alterations to the hydro-climatologic regime may result in changes to the sediment flux, and exacerbate the impacts of extreme events (such as large-magnitude floods) on sediment transport. In...
A non-destructive method for dating human remains
Warren K. Lail, David Sammeth, Shannon Mahan, Jason Nevins
2013, Advances in Archaeological Practice: A Journal of the Society for American Archaeology (1) 91-103
The skeletal remains of several Native Americans were recovered in an eroded state from a creek bank in northeastern New Mexico. Subsequently stored in a nearby museum, the remains became lost for almost 36 years. In a recent effort to repatriate the remains, it was necessary to fit them into...
Heavy mineral analysis for assessing the provenance of sandy sediment in the San Francisco Bay Coastal System
Florence L. Wong, Donald L. Woodrow, Mary McGann
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 170-180
Heavy or high-specific gravity minerals make up a small but diagnostic component of sediment that is well suited for determining the provenance and distribution of sediment transported through estuarine and coastal systems worldwide. By this means, we see that surficial sand-sized sediment in the San Francisco Bay Coastal System comes...
Biodiversity in a changing climate: a synthesis of current and projected trends in the US
Michelle D. Staudinger, Shawn L. Carter, Molly S. Cross, Natalie S. Dubois, J. Emmett Duffy, Carolyn Enquist, Roger Griffis, Jessica J. Hellmann, Joshua J. Lawler, John O’Leary, Scott A. Morrison, Lesley Sneddon, Bruce A. Stein, Laura M. Thompson, Woody Turner
2013, Frontiers in Ecology and the Environment (11) 465-473
This paper provides a synthesis of the recent literature describing how global biodiversity is being affected by climate change and is projected to respond in the future. Current studies reinforce earlier findings of major climate-change-related impacts on biological systems and document new, more subtle after-effects. For example, many species are...
Petroleum fingerprinting with organic markers
Frances D. Hostettler, T.D. Lorenson, Barbara A. Bekins
2013, Environmental Forensics (14) 262-277
Petroleum fingerprinting is an invaluable tool in forensic geochemistry. This article summarizes applications of fingerprinting in several oil spills and natural oil seepages that we have studied during the last 25 years. It shows how each unique chemical fingerprint can be used to correlate or differentiate oils. Fingerprints can provide...
Characterization of gas hydrate reservoirs by integration of core and log data in the Ulleung Basin, East Sea
J.-J. Bahk, G.-Y. Kim, J.-H. Chun, J.-H. Kim, J.Y. Lee, B.-J. Ryu, J.-H. Lee, B.-K. Son, Timothy S. Collett
2013, Marine and Petroleum Geology (47) 30-42
Examinations of core and well-log data from the Second Ulleung Basin Gas Hydrate Drilling Expedition (UBGH2) drill sites suggest that Sites UBGH2-2_2 and UBGH2-6 have relatively good gas hydrate reservoir quality in terms of individual and total cumulative thicknesses of gas-hydrate-bearing sand (HYBS) beds. In both of the sites, core...
