The Experts below are selected from a list of 264 Experts worldwide ranked by ideXlab platform
Valerie Paskevich - One of the best experts on this subject based on the ideXlab platform.
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Gulf of Mexico Coastal States
1999Co-Authors: Valerie PaskevichAbstract:This GIS overlay is a component of the U. S. Geological Survey, Woods Hole Field Center's, Gulf of Mexico ArcView GIS database. The Gulf of Mexico GIS database is intended to organize and display USGS held data and provide on-line (WWW) access to the data and/or metadata.
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U.S. Gulf of Mexico Coastal States
1999Co-Authors: Valerie PaskevichAbstract:This ArcView GIS layer is intended as a backdrop to the Gulf of Mexico area map. It contains the U.S. state boundaries in a polyline format. The coastal states area has been cropped to provide an overview extent for the Gulf of Mexico region.
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Gulf of Mexico ArcView project area background and extent
1999Co-Authors: Valerie PaskevichAbstract:This ArcView GIS layer is intended as a backdrop to the Gulf of Mexico area map. This layer defines the full extent of the Gulf of Mexico ArcView project area.
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Gulf of Mexico ArcView project area extent and background
1999Co-Authors: Valerie PaskevichAbstract:This GIS overlay is a component of the U. S. Geological Survey, Woods Hole Field Center's, Gulf of Mexico ArcView GIS database. The Gulf of Mexico GIS database is intended to organize and display USGS held data and provide on-line (WWW) access to the data and/or metadata.
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Gulf of Mexico Bathymetry Contours
1998Co-Authors: Valerie PaskevichAbstract:This GIS overlay is a component of the U. S Geological Survey, Woods Hole Field Center's, Gulf of Mexico ArcView GIS database. The Gulf of Mexico GIS database is intended to organize and display USGS held data and provide on-line (WWW) access to the data and/or metadata.
Mahlon C. Kennicutt - One of the best experts on this subject based on the ideXlab platform.
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Water Quality of the Gulf of Mexico
Habitats and Biota of the Gulf of Mexico: Before the Deepwater Horizon Oil Spill, 2017Co-Authors: Mahlon C. KennicuttAbstract:Water quality is determined by the interaction of physiographic setting with human activities and is measured as the degree of eutrophication—the clarity of water—and the levels of contaminants. The patterns and trends in the Gulf of Mexico water quality are highly variable in space and through time. Assessments conclude that water quality in the Gulf of Mexico coastal environments is highly influenced by human activities, and the primary cause of degraded water quality is excess nutrients. The resulting eutrophication has led to low dissolved oxygen and increased chlorophyll a concentrations, diminished water clarity, and other secondary effects including toxic/nuisance algal blooms and loss of submerged aquatic vegetation. Overall, the ecological condition of the coastal northern Gulf of Mexico was judged as fair to poor, water quality was fair, and expressions of eutrophication were high.
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Oil and Gas Seeps in the Gulf of Mexico
Habitats and Biota of the Gulf of Mexico: Before the Deepwater Horizon Oil Spill, 2017Co-Authors: Mahlon C. KennicuttAbstract:Oil and gas seeps are common worldwide; occur on land and beneath the ocean; are numerous in the Gulf of Mexico; and are biogenic, thermogenic, or mixed in origin. Seeps occur as gases, liquids, asphalts, and tars. Seeps are estimated to account for about 95 % of oil annually discharged to the Gulf of Mexico waters. Biogenic gas seeps have a microbial metabolic origin. Thermogenic hydrocarbons rise to the surface from more deeply buried source rock horizons or accumulations. The seepage of oil and gas into marine sediments initiates a complex biogeochemical cycle. A unique ecology has evolved in association with oil and gas seeps based on chemosynthesis and symbioses. Consortia of microbial species mediate the geological and biogeochemical processes that are essential for supporting what are commonly referred to as cold-seep communities. At these locations, bacteria oxidize hydrocarbons to carbon dioxide or bicarbonate ions, which favor the formation of hard ground substrate in otherwise mostly muddy environments. Thermogenic oil and gas seeps and biogenic gas seeps are pervasive and intrinsic features of the Gulf of Mexico. Thermogenic seeps will persist as long as oil and gas continue to migrate to the seafloor.
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Benthic tars in the Gulf of Mexico: Chemistry and sources
Organic Geochemistry, 2003Co-Authors: Fernando Alcazar, Mahlon C. Kennicutt, James M. BrooksAbstract:Abstract Benthic tars were collected at 14 locations in the northern Gulf of Mexico by trawling. Tars were altered to varying degrees by microbial degradation and dissolution. Most, if not all, of the benthic tars analyzed were significantly different from known production in the northern Gulf of Mexico. Differences in composition include light carbon isotope ratios; high contents of sulfur, nickel, and vanadium; an excess of phytane and norhopane over pristane and hopane, respectively; the presence of oleanane and moretanes in tars; and the low levels of diasteranes in tars. These benthic tars appear to be derived from oils produced in other areas of the world that have been transported into the Gulf of Mexico by man or natural agents. benthic tars are widespread in the Gulf of Mexico and represent an important sink for pelagic tars.
Samantha B. Joye - One of the best experts on this subject based on the ideXlab platform.
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The Gulf of Mexico: An Introductory Survey of a Seep-Dominated Seafloor Landscape
Marine Hydrocarbon Seeps, 2020Co-Authors: Andreas Teske, Samantha B. JoyeAbstract:The Gulf of Mexico is home to numerous hydrocarbon seeps, brine lakes and mud volcanoes that provide habitats for hydrocarbon-dependent microbial communities; trophic linkages connect these hydrocarbon microbiota with benthic marine invertebrates and provide the foundation of complex benthic ecosystems that are ultimately sustained by hydrocarbon seepage. Sampling and reconnaissance by submersibles provide a first impression of the diversity of Gulf of Mexico hydrocarbon seeps, paving the way for further discoveries. This chapter provides on overview of selected hydrocarbon and brine seeps on the northern slope of the Gulf of Mexico that were visited and explored during two month-long cruises with research submersible Alvin and R/V Atlantis in 2010 and 2014.
Andreas Teske - One of the best experts on this subject based on the ideXlab platform.
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The Gulf of Mexico: An Introductory Survey of a Seep-Dominated Seafloor Landscape
Marine Hydrocarbon Seeps, 2020Co-Authors: Andreas Teske, Samantha B. JoyeAbstract:The Gulf of Mexico is home to numerous hydrocarbon seeps, brine lakes and mud volcanoes that provide habitats for hydrocarbon-dependent microbial communities; trophic linkages connect these hydrocarbon microbiota with benthic marine invertebrates and provide the foundation of complex benthic ecosystems that are ultimately sustained by hydrocarbon seepage. Sampling and reconnaissance by submersibles provide a first impression of the diversity of Gulf of Mexico hydrocarbon seeps, paving the way for further discoveries. This chapter provides on overview of selected hydrocarbon and brine seeps on the northern slope of the Gulf of Mexico that were visited and explored during two month-long cruises with research submersible Alvin and R/V Atlantis in 2010 and 2014.
M. Frye - One of the best experts on this subject based on the ideXlab platform.
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Satellite SAR inventory of Gulf of Mexico oil seeps and shallow gas hydrates
2009Co-Authors: O. García, Beate G. Zimmer, William Shedd, Ian R. Macdonald, M. FryeAbstract:(1) Texas A&M University-Corpus Christi, USA (oscar.garcia@tamucc.edu) , (2) Texas A&M University-Corpus Christi, USA (ian.macdonald@tamucc.edu), (3) Texas A&M University-Corpus Christi, USA (beate.zimmer@tamucc.edu), (4) Gulf of Mexico Region office, Minerals Management Service, New Orleans, USA (william.shedd@mms.gov), (5) Gulf of Mexico Region office, Minerals Management Service, New Orleans, USA (mathew.frye@mms.gov)
