B31I:
Natural Wetlands, Inland Waters, and the Global Methane Cycle: Time to Reconcile Top-Down Atmospheric Estimates and Bottom-Up Biogeochemical Estimates of Methane Emissions I

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Session ID#: 31783

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:  Elaine Matthews, NASA Goddard Institute for Space Studies, New York, NY, 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:

Methane Emissions from Tree and Soils along a Wetland to Upland Transect (209593)
Scott Pitz1, Katalin A Szlavecz2, Patrick Megonigal3 and Chih-Han Chang1, (1)Johns Hopkins University, Baltimore, MD, United States, (2)Johns Hopkins University, Department of Earth and Planetary Sciences, Baltimore, MD, United States, (3)Smithsonian Environmental Research Center, Edgewater, United States
Improving the process understanding of methane emissions from a mid-latitude reservoir by combining eddy covariance monitoring with measurements of ebullition and underwater mixing (231714)
Sarah Waldo, United States Environmental Protection Agency, Air Planning, Seattle, WA, United States, Jake J Beaulieu, Environmental Protection Agency Cincinnati, Cincinnati, OH, United States and John T Walker, US Environmental Protection Agency, Office of Research and Development, Durham, United States
Toward an annual estimate of methane emissions from Lake Erie (232935)
Julianne M Fernandez, University of Maryland, College Park, United States and Amy Townsend-Small, University of Cincinnati, Cincinnati, OH, United States
Rain increases methane production and methane oxidation in a boreal thermokarst bog (242013)
Rebecca Bergquist Neumann1, Colby Moorberg2, Jesse Turner1, Andrea Wong1, Mark P Waldrop3, Eugenie Susanne Euskirchen4, Colin Edgar5 and Merritt R Turetsky6, (1)University of Washington Seattle Campus, Civil and Environmental Engineering, Seattle, WA, United States, (2)Kansas State University, Department of Agronomy, Manhattan, KS, United States, (3)U.S. Geological Survey, Geology, Minerals, Energy, and Geophysics Science Center, Menlo Park, United States, (4)University of Alaska Fairbanks, Institute of Arctic Biology, Fairbanks, United States, (5)Univesity of Alaska Fairbanks, Institute of Arctic Biology, Fairbanks, United States, (6)Renewable and Sustainable Energy Institute, Department of Ecology and Evolutionary Biology, Boulder, United States
Insight into the latitudinal distribution of methane emissions throughout the Holocene from ice core methane records. (278978)
Todd A Sowers, Pennsylvania State University Main Campus, University Park, PA, United States, Diana Vladimirova, St Petersburg State University, Earth Science Institute, St Petersburg, Russia and Thomas Blunier, Center for Ice and Climate, University of Copenhagen, Copenhagen, Denmark
Characterizing sub-arctic peatland vegeation using height estimates from structure from motion and an unmanned aerial system (UAS) (279761)
Michael W Palace, University of New Hampshire, Department of Earth Sciences, Durham, United States, Jessica DelGreco, Earth Systems Research Center, Durham, NH, United States, Christina Herrick, University of New Hampshire (UNH), Institute for the Study of Earth, Oceans, and Space (EOS), Durham, NH, United States, Franklin Sullivan, University of New Hampshire, Earth Systems Research Center, Durham, United States and Dr. Ruth K Varner, PhD, University of New Hampshire, Dept. of Earth Sciences and Earth Systems Research Center, Durham, NH, United States
Methane eddy covariance flux measurements from a low flying aircraft: Bridging the scale gap between local and regional emissions estimates (289252)
David S Sayres1, Ronald Dobosy2, Edward J Dumas3, John Kochendorfer4, Jordan Wilkerson1 and James G Anderson5, (1)Harvard University, Cambridge, MA, United States, (2)NOAA Oak Ridge, Oak Ridge, United States, (3)NOAA/ATDD, Oak Ridge, TN, United States, (4)NOAA Oak Ridge, Atmospheric Turbulence and Diffusion Division, Oak Ridge, TN, United States, (5)Harvard University, Cambridge, United States
Methane emissions from different coastal wetlands in New England, US (297163)
Faming Wang1, Jianwu Tang1, Kevin D Kroeger2 and Meagan Eagle Eagle2, (1)Marine Biological Laboratory, Woods Hole, MA, United States, (2)U.S. Geological Survey, Woods Hole Coastal and Marine Science Center, Woods Hole, MA, United States

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