B33A:
Natural Wetlands, Inland Waters, and the Global Methane Cycle: Reconciling Top-Down Atmospheric Estimates and Bottom-Up Biogeochemical Estimates of Methane Emissions I


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Session ID#: 59821

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 and remain conflated with those of wetlands. Wetland-methane emissions estimated from bottom-up biogeochemical, process, and Earth System models are consistently larger than those derived from top-down inverse models. In addition, the 30+ bottom-up, biogeochemical studies exhibit large differences in magnitude, distribution and seasonality of emissions due primarily to differences in wetland areas and less-than-optimal use of flux observations in model development/evaluation. This session aims at reconciling these long-standing inconsistencies. We invite novel investigations that reconcile the bottom-up process view with the top-down atmospheric perspective; link tower, aircraft and satellite observations with process understanding; wetland/lake definitions/characterization and their influence on modeled emissions; balancing model complexity with data availability; and highlighting remaining gaps and future directions.
Primary Convener:  Elaine Matthews, NASA Goddard Institute for Space Studies, 2880 Broadway, New York, NY, United States
Conveners:  Elaine Matthews, NASA Goddard Institute for Space Studies, 2880 Broadway, New York, NY, United States, Dr. Ruth K Varner, PhD, University of New Hampshire, Department of Earth Sciences, Durham, United States and Lori Bruhwiler, NOAA, Global Monitoring Laboratory, Boulder, United States
Primary Liaison:  Elaine Matthews, NASA Goddard Institute for Space Studies, 2880 Broadway, New York, NY, United States
Chairs:  Elaine Matthews, NASA, Ames Research Center, Moffett Field, CA, United States and Dr. Ruth K Varner, PhD, University of New Hampshire, Department of Earth Sciences, Durham, United States
OSPA Liaison:  Dr. Ruth K Varner, PhD, University of New Hampshire, Department of Earth Sciences, Durham, United States
Co-Organized with:
Biogeosciences, and Hydrology

Proposed Co-Organized Session with:
  • A - Atmospheric Sciences
  • C - Cryosphere
  • GC - Global Environmental Change
  • H - Hydrology
Index Terms:

0365 Troposphere: composition and chemistry [ATMOSPHERIC COMPOSITION AND STRUCTURE]
0428 Carbon cycling [BIOGEOSCIENCES]
0475 Permafrost, cryosphere, and high-latitude processes [BIOGEOSCIENCES]
0497 Wetlands [BIOGEOSCIENCES]

Abstracts Submitted to this Session:

­Eighty-five percent of terrestrial methane emissions arise from a single landscape feature type during spring thaw in Barrow, Alaska. (381393)
Robert Wagner1, Emanuel Storey2, Kyle Andreas Arndt3, David Lipson4 and Walter C Oechel4, (1)San Diego State University, Department of Biology, San Diego, CA, United States, (2)San Diego State University, Geography, San Diego, CA, United States, (3)University of New Hampshire Main Campus, Earth Systems Research Center, Institute for the Study of Earth, Oceans, and Space, Durham, United States, (4)San Diego State University, Department of Biology, San Diego, United States
Aquatic Macrophyte Methane Fluxes: How Important are Plant Species and Diel Patterns for Overall Emissions? (436863)
David Bastviken1, Per Milberg2, Lina Törnqvist2, Lars Westerberg2 and Patrick M Crill3, (1)Linköping University, Department of Thematic Studies – Environmental Change, Linköping, Sweden, (2)Linkoping University, Linkoping, Sweden, (3)Stockholm University, Stockholm, Sweden
Management Practices and Landscape Context Impact Methane Dynamics from Subtropical Wetlands (467857)
Nicholas DeLucia, University of Illinois at Urbana Champaign, Urbana, IL, United States, Carl Bernacchi, University of Illinois Urbana-Champaign, DOE Center for Advanced Bioenergy and Bioproducts Innovation, Urbana, United States and Nuria Gomez-Casanovas, University of Illinois at Urbana-Champaign, Institute for Sustainability, Energy, and Environment; Center for Advanced Bioenergy and Bioproducts Innovation; Carl R. Woese Institute for Genomic Biology, Urbana, IL, United States
Tracking Nighttime Methane Signals at the Amazon Tall Tower Observatory (ATTO). (382987)
Santiago Botia1, Christoph Gerbig1, Julia Marshall1, Gilberto Fisch2 and Jost Valentin Lavric3, (1)Max Planck Institute for Biogeochemistry, Biogeochemical Signals, Jena, Germany, (2)INPE National Institute for Space Research, Sao Jose dos Campos, Brazil, (3)Max Planck Institute for Biogeochemistry, Jena, Germany
Examining bottom-up calculations of global-scale fluxes from inland waters: possible contributors to variation and magnitude among estimates (438404)
Emily H Stanley, University of Wisconsin Madison, Center for Limnology, Madison, United States, Luke Loken, University of Wisconsin Madison, Madison, WI, United States, Nora J Casson, University of Winnipeg, Department of Geography, Winnipeg, MB, Canada and Jessica Corman, University of Nebraska Lincoln, Lincoln, United States
The Problem with Wetlands and Methane: Challenges in Understanding Regional Biophysical Drivers and Spatial Distributions of Emission from Northern Ecosystems (Invited) (454489)
Jennifer Watts, Woodwell Climate Research Center, Falmouth, MA, United States
Integrating Microbial and Isotopic Observations to Characterize Methane Emissions from Global High-Latitude Peatlands (437510)
Carmody K McCalley, Rochester Institute of Technology, Rochester, NY, United States, Louis J Lamit, Syracuse University, Syracuse, NY, United States, Joanne H Shorter, Aerodyne Research, Inc., Billerica, MA, United States, Patrick M Crill, Stockholm University, Stockholm, Sweden, Sari Juutinen, University of Helsinki, Department of Forest Sciences, Helsinki, Finland, Tuula Larmola, Natural Resources Institute Finland, Vantaa, Finland, Michael W Palace, University of New Hampshire, Dept. of Earth Sciences and Earth Systems Research Center, Durham, United States, Virginia Isabel Rich, Ohio State University, Department of Microbiology, Columbus, United States and Dr. Ruth K Varner, PhD, University of New Hampshire, Department of Earth Sciences, Durham, United States
Evaluation of Matthews-WLR-CH4: A New Wetland, Lake, and Reservoir Methane Emissions Data Set (381193)
Matthew S Johnson, Earth Science Division, NASA Ames Research Center, Moffett Field, CA, United States, Elaine Matthews, NASA, Ames Research Center, Moffett Field, CA, United States, Emma L Yates, NASA Ames Research Center, Moffett Field, CA, United States, Joy Romanski, Columbia University of New York/NASA GISS, New York, NM, United States, Scot M Miller, Johns Hopkins University, Environmental Health and Engineering, Baltimore, MD, United States, Arlyn Andrews, SilverLining, Washington, DC, United States, Lori Bruhwiler, NOAA, Global Monitoring Laboratory, Boulder, United States, Kirk W Thoning, NOAA, Global Monitoring Laboratory, Boulder, CO, United States and Doug Worthy, Environment Canada, Toronto, ON, Canada

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