BN24C:
Methane from the Subsurface Through the Bio-, Hydro-, and Atmosphere: Advances in Natural Hydrate Systems and Methane Seeps in Marine Ecosystems Posters


Session ID#: 28189

Session Description:
Gas hydrates and gas-filled pockets in marine sediments represent enormous repositories of methane. Methane seepage into the ocean fuels chemosynthetic biological communities, supports the formation of new habitats through long-term precipitation of carbonate hard grounds, and potentially has a regional impact on the chemistry and biology of the overlying water column. There has been a rapid advance in the discovery of these sites, with a new appreciation for the ubiquitous nature of hydrate and methane fueled systems at both active and passive continental margins and the recognition that geological or environmental events, such as earthquakes, submarine landslides, and ocean warming, can alter the release of sequestered methane to the ocean. These discoveries change our understanding of the role and scale of methane-based processes to the earth-ocean-atmosphere system. This session seeks to combine multi-disciplinary research topics to assess the current baseline of methane seepage to the global oceans and its environmental impact. We welcome contributions including, but not limited to, geophysical surveys of the subsurface, regional mapping of gas plumes, analyses of source gases and hydrate and their fate in the water column, temporal studies from ocean observatories, sediment and carbonate geochemistry, and biological studies of seep-driven chemosynthetic ecosystems.
Primary Chair:  Tamara Baumberger, NOAA/PMEL, Newport, OR, United States
Co-chairs:  Andrew Thurber1, Jeffrey J Marlow2 and Marta E Torres1, (1)Oregon State University, Corvallis, OR, United States(2)Harvard University, Cambridge, MA, United States
Moderators:  Andrew Thurber1, Jeffrey J Marlow2, Marta E Torres1 and Tamara Baumberger3, (1)Oregon State University, Corvallis, OR, United States(2)Harvard University, Cambridge, MA, United States(3)NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States
Student Paper Review Liaisons:  Marta E Torres, Oregon State University, Corvallis, OR, United States and Jeffrey J Marlow, Harvard University, Cambridge, MA, United States
Index Terms:

1615 Biogeochemical cycles, processes, and modeling [GLOBAL CHANGE]
3002 Continental shelf and slope processes [MARINE GEOLOGY AND GEOPHYSICS]
3004 Gas and hydrate systems [MARINE GEOLOGY AND GEOPHYSICS]
4840 Microbiology and microbial ecology [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Cross-Topics:
  • CT - Chemical Tracers, Organic Matter and Trace Elements
  • MG - Marine Geology and Sedimentology
  • MM - Microbiology and Molecular Ecology
  • OC - Ocean Change: Acidification and Hypoxia

Abstracts Submitted to this Session:

A Methane Pulse Driven by Seamount Subduction Beneath the Rock Garden Ridge on the Hikurangi Margin, off New Zealand (303046)
Marta E Torres1, Gareth James Crutchley2, Sabine Kasten3, Thomas Pape4, WeiLi Hong5, Stuart A Henrys2, Cornelius Octavian Schwarze6, Katrin Huhn7 and Nina Kukowski6, (1)Oregon State Univ, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (2)GNS Science, Lower Hutt, New Zealand, (3)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (4)University of Bremen, Bremen, Germany, (5)Geological Survey of Norway, Trondheim 7491, Norway, (6)Friedrich-Schiller-University Jena, Jena, Germany, (7)MARUM, Bremen, Germany
'Physical properties of the supercritical accretionary ridge Rock Garden, Hikurangi convergent margin, New Zealand' (305547)
Cornelius Octavian Schwarze1, Nina Kukowski1, Tim Freudenthal2, Gareth James Crutchley3, Stuart A Henrys3, Matthew Jeromson4, Anne Schulz1, Patrick Heinemann1 and Katrin Huhn2, (1)Friedrich-Schiller-University Jena, Jena, Germany, (2)MARUM, Bremen, Germany, (3)GNS Science, Lower Hutt, New Zealand, (4)The University of Auckland, Auckland, New Zealand
Methane Cycling in the High Antarctic; Biogeochemistry, Microbial Succession, and Biogeography of a New and Newly Discovered Methane Seep (315983)
Andrew Thurber, Oregon State University, Corvallis, OR, United States and Sarah Seabrook, Oregon State University, CEOAS, Corvallis, OR, United States
Analysis of microbial communities in marine sediments enriched at in situ conditions undergoing anaerobic methane oxidation rates that vary with methane concentration and time (309169)
Scott Klasek1, WeiLi Hong2, Doug Bartlett3, Marta E Torres1 and Frederick S Colwell4, (1)Oregon State University, Corvallis, OR, United States, (2)Geological Survey of Norway, Trondheim 7491, Norway, (3)Scripps Institution of Oceanography, La Jolla, CA, United States, (4)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States
New Insights into Methane Driven Dissolved Organic Matter Dynamics in the Arctic Ocean (308463)
Muhammed Fatih Sert1, Anna Silyakova1, Friederike Grundger1, Juliana D'Andrilli2, Helge Niemann1,3, Alexey Pavlov4, Mats A Granskog4, Colin A Stedmon5 and Bénédicte Ferre1, (1)The Arctic University of Norway, Centre for Arctic Gas Hydrate, Environment and Climate, Tromsø, Norway, (2)Louisiana Universities Marine Consortium, Chauvin, LA, United States, (3)University of Basel, Dept. of Environmental Sciences, Basel, Switzerland, (4)Norwegian Polar Institute, Tromsø, Norway, (5)Technical University of Denmark, National Institute for Aquatic Resources, Kgs. Lyngby, Denmark
Lipid Biomarkers and Their Specific Carbon Isotopic Composition from Cold Seep Community Authigenic Carbonates and Sediment from the Mid-Atlantic, USA: Norfolk and Baltimore Canyons (308187)
Pamela Lynn Campbell, USGS Pacific Coastal and Marine Science Center Santa Cruz, Santa Cruz, CA, United States and Nancy Prouty, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, CA, United States
Rock-Hosted Microbial Communities Possess Substantial Methane Oxidizing Potential at Geologically Diverse Methane Seep Sites (317938)
Jeffrey J Marlow1, Amy Gartman1, Sean Jungbluth2, Daniel Hoer1, Linda Reynard1, Noreen Tuross1, Victoria J Orphan3 and Peter R Girguis1, (1)Harvard University, Cambridge, MA, United States, (2)University of Hawaii at Manoa, Honolulu, HI, United States, (3)California Institute of Technology, Pasadena, CA, United States
Linking Cold Seep Processes to Margin Ecosystems: Use of a methane seep by Tanner Crabs (315956)
Sarah Seabrook, Oregon State University, CEOAS, Corvallis, OR, United States, Fabio De Leo, Ocean Networks Canada, University of Victoria, BC, Canada and Andrew Thurber, Oregon State University, Corvallis, OR, United States
Geologic Setting of Numerous Newly Discovered Methane Bubble Stream Sites Along the Cascadia Margin (322190)
Robert W Embley, PhD, Newport OR, Newport, OR, United States, Susan G. Merle, Oregon State University, CIMRS, Newport, OR, United States, Nicole Raineault, Ocean Exploration Trust Inc., Narragansett, RI, United States and Lindsay Gee, Acoustic Imaging, Portsmouth, NH, United States
Compilation of Water Column Methane Emission Sites on the U.S. Cascadia Margin from Five Recent Expeditions and a Historical Database (314326)
Susan G Merle1, Robert W Embley2, H. P. Johnson3, T. K. Lau1, Erica Sampaga3, Nicole Raineault4 and Lindsay Gee5, (1)Oregon State University, Newport, OR, United States, (2)NOAA Pacific Marine Environmental Laboratory, Newport, OR, United States, (3)University of Washington Seattle Campus, School of Oceanography, Seattle, WA, United States, (4)Ocean Exploration Trust Inc., Narragansett, RI, United States, (5)Acoustic Imaging, Portsmouth, NH, United States
Variations in Ocean Temperatures on the Cascadia Margin: Implications for Hydrate Instability (313964)
Benjamin Phrampus1, Robert N Harris1, Anne M Trehu2, Robert W Embley3 and Susan G Merle4, (1)Oregon State University, Corvallis, OR, United States, (2)Oregon State Univ, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (3)NOAA Pacific Marine Environmental Laboratory, Newport, OR, United States, (4)Oregon State University, Newport, OR, United States
A Rationale for In-Situ Sampling of Methane Hydrates on the Seafloor (314248)
John E Lupton, NOAA/PMEL, Newport, OR, United States, Tamara Baumberger, NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States, Robert W Embley, NOAA Pacific Marine Environmental Laboratory, Newport, OR, United States, Susan G Merle, Oregon State University, Newport, OR, United States and Conrad Young, Engineer, Ramona, CA, United States
The near-bottom distribution of ORP anomalies at methane seeps along the U.S. Cascadia continental margin (315335)
Sharon L Walker, NOAA Seattle, Seattle, WA, United States, Tamara Baumberger, NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States, Susan G Merle, Oregon State University, Newport, OR, United States and Robert W Embley, NOAA Pacific Marine Environmental Laboratory, Newport, OR, United States

See more of: Biogeochemistry and Nutrients