B21C:
Greenhouse Gas Exchange, Production, and Biogeochemical Transformations in Marine and Terrestrial High-Latitude Open-Water Systems Posters

Submit an Abstract to this Session



Session ID#: 26207

Session Description:
High-latitude warming has the potential to release carbon stored beneath lakes and rivers, thaw subsea permafrost in the coastal zone, and dissociate methane hydrate beneath the oceans. These high-latitude carbon stocks contain enough carbon to dramatically elevate the global greenhouse gas inventory, yet their atmospheric contributions appear relatively small, at present. Aquatic systems are conduits for transmitting carbon-mobilizing heat into sediments and the seafloor. They are also habitats for biological communities that consume and transform carbon and other elements into biomass and other reservoirs, thereby limiting gas transfer to the atmosphere. We welcome microbiological, geochemical, and modeling studies from a range of aquatic systems including lakes, rivers, polynyas, ice-covered and ice-free seas, that quantify fluxes, constrain origins, and decipher elemental cycles influencing carbon and greenhouse gas exchange. We encourage studies that utilize novel instrumental and analytical strategies, and explore carbon cycle and greenhouse gas dynamics during previous climate transitions.
Primary Convener:  John Pohlman, USGS Coastal & Marine Science Center Woods Hole, Woods Hole, United States
Convener:  Brett Thornton, Stockholm University, Dept. of Geological Sciences, Stockholm, Sweden
Chairs:  Brett Thornton, Stockholm University, Dept. of Geological Sciences, Stockholm, Sweden and John Pohlman, U.S. Geological Survey, Woods Hole Coastal and Marine Science Center, Woods Hole, United States
OSPA Liaison:  John Pohlman, U.S. Geological Survey, Woods Hole Coastal and Marine Science Center, Woods Hole, United States
Index Terms:

0414 Biogeochemical cycles, processes, and modeling [BIOGEOSCIENCES]
0475 Permafrost, cryosphere, and high-latitude processes [BIOGEOSCIENCES]
0793 Biogeochemistry [CRYOSPHERE]
3339 Ocean/atmosphere interactions [ATMOSPHERIC PROCESSES]

Abstracts Submitted to this Session:

Limited contribution of ancient methane to surface waters of the U.S. Beaufort Sea shelf (Invited) (211450)
Katy J Sparrow, Stockholm University, Stockholm, Sweden and John D Kessler, University of Rochester, Department of Earth and Environmental Sciences, Rochester, NY, United States
The predominance of young carbon in Arctic whole-lake CH4 and CO2 emissions and implications for Boreal yedoma lakes. (226951)
Clayton Elder, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, Xiaomei Xu, University of California Irvine, Earth System Science, Irvine, United States, Jennifer Clare Walker, University of California Irvine, Irvine, CA, United States, Katey M Walter Anthony, University of Alaska Fairbanks, Water and Environmental Research Center, Fairbanks, AK, United States, John Pohlman, U.S. Geological Survey, Woods Hole Coastal and Marine Science Center, Woods Hole, United States, Christopher D Arp, University of Alaska Fairbanks, Water and Environmental Research Center, Fairbanks, United States, Amy Townsend-Small, University of Cincinnati, Cincinnati, OH, United States, Kenneth M Hinkel, University of Cincinnati, Cincinnati, United States and Claudia I Czimczik, University of California Irvine, Earth System Science, Irvine, CA, United States
Modeling the Space-Time Destiny of Pan-Arctic Permafrost DOC in a Global Land Surface Model: Feedback Implications (231088)
Simon Bowring, LSCE Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette Cedex, France, Ronny Lauerwald, University of Exeter, College of Engineering, Mathematics and Physical Sciences, Exeter, EX4, United Kingdom, Bertrand Guenet, Ecole Normale Supérieure Paris, Paris, France, Dan Zhu, CEA Saclay DSM / LSCE, Gif sur Yvette, France and Philippe Ciais, LSCE Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette, France
Abundant Pre-Industrial Carbon Emitted by Arctic Inland Waters (241505)
Joshua Dean1, Ype Van der Velde1, Michael F Billett2, Kerry Jane Dinsmore3, Mark Garnett4, Ove Meisel5 and A Johannes Dolman1, (1)Free University of Amsterdam, Amsterdam, Netherlands, (2)University of Stirling, Stirling, United Kingdom, (3)Centre for Ecology and Hydrology, Biosphere-Atmosphere Interactions, Edinburgh, United Kingdom, (4)Scottish Universities Environmental Research Center at the University of Glasgow, NERC Radiocarbon Facility, East Kilbride, United Kingdom, (5)Vrije Universiteit Amsterdam, Department of Earth Sciences, Amsterdam, Netherlands
Implications for carbon processing beneath the Greenland Ice Sheet from dissolved CO2 and CH4 concentrations of subglacial discharge (241671)
Andrea Pain1, Jonathan B. Martin2 and Ellen E. Martin2, (1)University of Maryland Center for Environmental Science Horn Point Laboratory, Cambridge, United States, (2)University of Florida, Geological Sciences, Gainesville, United States

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