B32C:
Natural Wetlands, Inland Waters, and the Global Methane Cycle: Time to Reconcile Top-Down Atmospheric Estimates and Bottom-Up Biogeochemical Estimates of Methane Emissions II

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Session ID#: 31777

Session Description:
Natural wetlands are the world's largest source of methane (CH4) to the atmosphere; emissions from inland waters have not yet been comprehensively assessed. About 50% of the world's wetlands and lakes are in regions >50˚N that are experiencing amplified warming. Wetland-methane emissions estimated from bottom-up biogeochemical, process, and Earth System models are consistently larger than those derived from top-down inverse models. Moreover, a large suite of bottom-up, biogeochemical studies exhibit large differences in magnitude, distribution and seasonality of emissions due primarily to differences in wetland areas and perhaps due to minimal use of flux observations in model evaluation. This session invites novel investigations aimed at reconciling these long-standing inconsistencies, and filling the gap in lake emissions, by reconciling the bottom-up process view with the top-down atmospheric perspective; reconciling tower, aircraft and satellite observations with process understanding; wetland/lake definitions/characterization and their influence on modeled emissions; balancing model complexity with data availability.
Primary Convener:  Elaine Matthews, NASA Goddard Institute for Space Studies, 2880 Broadway, New York, NY, United States
Conveners:  Dr. Ruth K Varner, PhD, University of New Hampshire, Durham, NH, United States, Lori Bruhwiler, NOAA Boulder, Boulder, CO, United States and David Bastviken, Linköping University, Department of Thematic Studies – Environmental Change, Linköping, Sweden
Chairs:  Elaine Matthews, NASA Goddard Institute for Space Studies, New York, NY, United States and Dr. Ruth K Varner, PhD, University of New Hampshire, Durham, NH, United States
OSPA Liaison:  Dr. Ruth K Varner, PhD, University of New Hampshire, Durham, NH, United States

Cross-Listed:
  • A - Atmospheric Sciences
  • C - Cryosphere
  • GC - Global Environmental Change
  • H - Hydrology
Index Terms:

0475 Permafrost, cryosphere, and high-latitude processes [BIOGEOSCIENCES]
0497 Wetlands [BIOGEOSCIENCES]
1836 Hydrological cycles and budgets [HYDROLOGY]
3322 Land/atmosphere interactions [ATMOSPHERIC PROCESSES]

Abstracts Submitted to this Session:

Small ponds play big role in greenhouse gas emissions from inland waters (Invited) (213514)
Meredith Holgerson, Cornell University, Department of Ecology and Evolutionary Biology, Ithaca, United States and Peter A Raymond, Yale University, School of the Environment, New Haven, CT, United States
A synthesis of growing-season, non-growing season, and annual methane emission measurements among temperate, boreal, and tundra wetlands and uplands (Invited) (213950)
Claire C Treat1,2, A. Anthony Bloom3 and Maija E Marushchak1, (1)University of Eastern Finland, Joensuu, Finland, (2)University of Eastern Finland, Department of Environmental and Biological Sciences, Kuopio, Finland, (3)NASA Jet Propulsion Laboratory, Pasadena, CA, United States
Contribution of Anthropogenic and Natural Emissions to Global CH4 Balances by Utilizing δ13C-CH4 Observations in CarbonTracker Data Assimilation System (CTDAS) (217529)
Vilma Kangasaho1, Aki Tsuruta1, Tuula Aalto1, Leif Bjarne Backman1, Sander Houweling2, Maarten C Krol3,4, Wouter Peters5,6, Ingrid Theodora van der Laan-Luijkx7,8, Sebastian Lienert9, Fortunat Joos9, Edward J Dlugokencky10, Sylvia Michel11 and James W C White12, (1)Finnish Meteorological Institute, Helsinki, Finland, (2)SRON, Netherlands Institute for Space Research, Utrecht, Netherlands, (3)Netherlands Institute for Space Research, Utrecht, Netherlands, (4)Wageningen University, Environmental Sciences, Wageningen, Netherlands, (5)Centre for Isotope Research, Groningen, Netherlands, (6)Wageningen University and Research Center, Department of Meteorology and Air Quality, Wageningen, Netherlands, (7)Wageningen University and Research, Wageningen, Netherlands, (8)Institute for Marine and Atmospheric Research Utrecht, Utrecht, Netherlands, (9)University of Bern, Climate and Environmental Physics, Bern, Switzerland, (10)NOAA Earth System Research Laboratory, Boulder, CO, United States, (11)University of Colorado Boulder, Institute of Arctic and Alpine Research, Boulder, United States, (12)Institute of Arctic and Alpine Research, Geological Sciences, Boulder, CO, United States
Simplifiying global biogeochemistry models to evaluate methane emissions (229659)
Stefan Gerber and Carla Alonso-Contes, University of Florida, Ft Walton Beach, FL, United States
Scaling isotopic emissions and microbes across a permafrost thaw landscape (273736)
Dr. Ruth K Varner, PhD1, Michael W Palace2, Scott R Saleska3, Benjamin Bolduc4, Bobby H Braswell Jr5, Patrick M Crill6, Jeff Chanton7, Jessica DelGreco1, Jia Deng8, Steve E Frolking9, Christina Herrick10, Mark E Hines11, Changsheng Li9, Kellen J McArthur1, Carmody K McCalley12, Andreas Persson13, Nigel T Roulet14, Nathan Torbick15, Gene W. Tyson16 and Virginia Isabel Rich17, (1)University of New Hampshire, Dept. of Earth Sciences and Earth Systems Research Center, Durham, NH, United States, (2)University of New Hampshire, Dept. of Earth Sciences and Earth Systems Research Center, Durham, United States, (3)University of Arizona, Department of Ecology & Evolutionary Biology, Tucson, AZ, United States, (4)Ohio State University Main Campus, Columbus, OH, United States, (5)Indigo Ag, Boston, United States, (6)Stockholm University, Department of Geological Sciences, Stockholm, Sweden, (7)Florida State University, Department of Earth, Ocean & Atmospheric Science, Tallahassee, United States, (8)University of New Hampshire, Institute for the Study of Earth, Oceans, and Space, Durham, United States, (9)University of New Hampshire, Earth Systems Research Center, Durham, NH, United States, (10)University of New Hampshire, Earth Systems Research Center, Durham, United States, (11)Univ Massachusetts Lowell, Lowell, MA, United States, (12)Rochester Institute of Technology, Rochester, NY, United States, (13)Lund University, Lund, Sweden, (14)Centre for northern studies (CEN), Quebec City, QC, Canada, (15)Mitti Labs Limited, Mumbai, India, (16)University of Queensland, Center for Microbiome Research, Woolloongabba, Australia, (17)Ohio State University, Department of Microbiology, Columbus, United States
Ecosystem Level Methane Dynamics in a Southern Forest Wetland (287494)
Bhaskar Mitra1,2, Kevan Minick3, Guofang Miao4, Jonathan Furst3, Jean-Christophe Domec5, Ge Sun6, Steven McNulty6, John S King7 and Asko Noormets8, (1)Northern Arizona University, School of Informatics, Computing and Cyber Systems, Flagstaff, AZ, United States, (2)Texas A&M University, Department of Ecosystem Science and Management, College Station, TX, United States, (3)North Carolina State University, Department of Forestry and Environmental Resources, Raleigh, NC, United States, (4)University of Illinois at Urbana-Champaign, Department of Natural Resources and Environmental Sciences, Urbana, United States, (5)Duke University, Nicholas School of the Environment, Durham, United States, (6)USDA Forest Svc, Eastern Forest Environmental Threat Assessment Center, Raleigh, NC, United States, (7)North Carolina State University, Department of Forestry and Environmental Resources, Raleigh, United States, (8)Texas A&M University, Department of Ecology and Conservation Biology, College Station, United States

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