OS44A:
Ocean Gas Plume Science: Hydrocarbon Transport in the Geo-, Hydro-, Atmo-spheres II

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Session ID#: 16323

Session Description:
It is estimated that approximately 30% of total CH4 emissions are a result of both natural and anthropogenic sources on the seafloor (Ciais et al.  2014). However, these emissions are not well characterized and observations are limited to relatively short timescales in a few select, heavily instrumented, regions (e.g., Barnes and Tunnicliffe 2008). Additionally, upward transport pathways and the fate of emitted CH4 from these sources is poorly constrained resulting in substantial uncertainty in models of natural CH4 injection and carbon cycling in the ocean and atmosphere (Stocker et al. 2013). This session seeks contributions focused on quantifying fundamental processes of hydrocarbon emissions, transport, and cycling in the geosphere, hydrosphere, and atmosphere. Results of field, laboratory, and numerical modeling investigations are welcomed and those integrating observational scales (e.g. linking bubble processes with plume detection and regional geological controls) or differentiating natural and anthropogenic emissions are encouraged.
Primary Convener:  Alex Barnard, University of Houston, Houston, TX, United States
Convener:  Hiroshi Fukuoka, Niigata University, Research Institute for Natural Hazards and Disaster Recovery, Niigata, Japan
Chairs:  Alex Barnard, University of Houston, Houston, TX, United States and Hiroshi Fukuoka, Niigata University, Research Institute for Natural Hazards and Disaster Recovery, Niigata, Japan
OSPA Liaison:  Alex Barnard, University of Houston, Houston, TX, United States
Index Terms:

3004 Gas and hydrate systems [MARINE GEOLOGY AND GEOPHYSICS]
3045 Seafloor morphology, geology, and geophysics [MARINE GEOLOGY AND GEOPHYSICS]
8010 Fractures and faults [STRUCTURAL GEOLOGY]
9810 New fields (not classifiable under other headings) [GENERAL OR MISCELLANEOUS]

Abstracts Submitted to this Session:

Quantification of Methane Gas Flux and Bubble Fate on the Eastern Siberian Arctic Shelf Utilizing Calibrated Split-beam Echosounder Data. (Invited) (122698)
Elizabeth Frances Weidner1, Larry A Mayer1, Thomas C Weber2, Kevin Jerram2, Martin Jakobsson3, Denis Chernykh4, Roman Ananiev4,5, Rezwan Mohammad3 and Igor Peter Semiletov4, (1)Center for Coastal & Ocean Mapping, School of Marine Science and Ocean Engineering/Joint Hydrographic Center, University of New Hampshire, Durham, United States, (2)Center for Coastal & Ocean Mapping, School of Marine Science and Ocean Engineering/Joint Hydrographic Center, University of New Hampshire, Durham, NH, United States, (3)Stockholm University, Department of Geological Sciences, Stockholm, Sweden, (4)National Research Tomsk Polytechnic University, Tomsk, Russia, (5)Shirshov Institute of Oceanology, Moscow, Russia
Characterization and physical properties of hydrate bearing sediments (Invited) (146400)
Marco Terzariol and Carlos Santamarina, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
Applications of multi-frequency single beam sonar fisheries analysis methods for seep quantification and characterization (180115)
Victoria Price1,2, Tom Weber3, Kevin Jerram1 and Maurice Doucet4, (1)Center for Coastal & Ocean Mapping, School of Marine Science and Ocean Engineering/Joint Hydrographic Center, University of New Hampshire, Durham, NH, United States, (2)Normandeau Associates, Inc., Bedford, NH, United States, (3)University of New Hampshire, Center for Coastal & Ocean Mapping, School of Marine Science and Ocean Engineering/Joint Hydrographic Center, University of New Hampshire, Durham, United States, (4)Quality Positioning Services, Inc., Portsmouth, NH, United States
Ice core measurements of 14CH4 show no evidence of methane release to atmosphere from methane hydrates during a large warming event 11,600 years ago (167496)
Vasilii V Petrenko1, Jeffrey P Severinghaus2, Andrew Wyatt Smith3, Katja Riedel4, Edward J Brook5, Hinrich Schaefer4, Daniel Baggenstos6,7, Christina M Harth8, Quan Hua9, Christo Buizert5, Adrian Schilt10,11, Xavier Fain12, Logan Mitchell13, Thomas K Bauska14,15, Anais J Orsi16 and Ray F Weiss8, (1)University of Rochester, Earth and Environmental Sciences, Rochester, NY, United States, (2)Scripps Institution of Oceanography, La Jolla, United States, (3)RSMAS, Ocean Sciences, Miami, FL, United States, (4)NIWA National Institute of Water and Atmospheric Research, Wellington, New Zealand, (5)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States, (6)University of Tasmania, Australian Antarctic Program Partnership, Institute for Marine & Antarctic Studies, Hobart, Australia, (7)Climate and Environmental Physics and Oeschger Center for Climate Research, University of Bern, Bern, Switzerland, (8)Scripps Institution of Oceanography, La Jolla, CA, United States, (9)Australian Nuclear Science and Technology Organisation (ANSTO), Kirrawee DC, Australia, (10)Oregon State University, Corvallis, OR, United States, (11)University of Bern, Physics Institute, Bern, Switzerland, (12)University Grenoble Alpes, CNRS, INRAE, IRD, IGE, Grenoble, France, (13)University of Utah, Atmospheric Sciences, Salt Lake City, UT, United States, (14)NERC British Antarctic Survey, Cambridge, United Kingdom, (15)University of Cambridge, Earth Sciences, Cambridge, United Kingdom, (16)LSCE Laboratoire des Sciences du Climat et de l'Environnement, IPSL - CEA - CNRS - UVSQ - Universite Paris-Saclay, Gif-Sur-Yvette Cedex, France
Control of the geomorphology and gas hydrate extent on widespread gas emissions offshore Romania (Black Sea) (126810)
Vincent Riboulot1, Antonio Cattaneo2, Nabil Sultan3, Stephan Ker1, Carla Scalabrin1, Arnaud Gaillot2, Gwenael Jouet1, Bruno Marsset1, Yannick Thomas4, Grégory Ballas1, Tania Marsset1, Sébastien Garziglia3, Livio Ruffine1 and Cedric Boulart1, (1)IFREMER, Geosciences Marines, EDROME, Plouzané, France, (2)IFREMER, Plouzané, France, (3)IFREMER, Marine Geosciences Research Unit, Plouzané, France, (4)Geo-Ocean, UMR6538, CNRS, Univ Brest, Ifremer, Plouzané, France
Shallow plumbing systems inferred from spatial analysis of pockmark arrays (144811)
Ana Maia, Cardiff University, School of Earth and Ocean Sciences, Cardiff, United Kingdom, Joe A Cartwright, University of Oxford, Department of Earth Sciences, Oxford, United Kingdom and Espen Andersen, Statoil Norway, Stavanger, Norway
Discovery of siderite in marine sediment: Source and effect of violent gas venting at the Tsanyao Mud Volcano, offshore SW Taiwan (170937)
Yiting Tseng1, Saulwood Lin1, I-Chih Hsieh2 and Kai-Li Lien1, (1)IONTU Institute of Oceanography National Taiwan University, Taipei, Taiwan, (2)National Taiwan University, Institute of Oceanography, Taipei, Taiwan
A preliminary experiment to collect gas from a submarine gas plume (195718)
Chiharu Aoyama, Tokyo University of Marine Science and Technology, Tokyo, Japan and Hiroshi Fukuoka, Niigata University, Research Institute for Natural Hazards and Disaster Recovery, Niigata, Japan
Natural Gas Venting on the Northern Cascadia Margin (142456)
Michael Riedel1, Martin Scherwath2, Miriam Roemer3, Charles K Paull4, George Spence5 and Mario Veloso1, (1)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (2)University of Victoria, Ocean Networks Canada, Victoria, BC, Canada, (3)MARUM - University of Bremen, Bremen, Germany, (4)Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States, (5)University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada

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