B43J:
Natural Wetlands and Open Waters in the Global Methane Cycle: Modeling, Observations, and Challenges II


Session ID#: 8296

Session Description:
Natural wetlands/open waters—the world's largest, climate-sensitive methane source—are contributors to interannual and decadal fluctuations in atmospheric CH4 concentrations. Uncertainties in CH4 dynamics in wetlands derive from heterogeneity in vegetation, microtopography, permafrost condition, hydrology, and processes governing CH4 production, oxidation, and emission. Understanding and modeling CH4 dynamics and distributions of wetlands/open waters is crucial to simulating methane dynamics and feedbacks between wetlands and past, present and future climates. 

We invite presentations addressing: global-to-regional modeling CH4 dynamics in wetlands and open waters; inverse- and climate-chemistry modeling of wetland-methane dynamics; process studies of CH4 production, oxidation and emission; modeling of wetland distributions; synthesis studies of CH4 fluxes and controlling variables; remote sensing of hydrologic dynamics and vegetation characterization of wetlands; role of wetlands and water bodies in the global CH4 cycle through time. We welcome submissions identifying challenges to quantifying the role of wetlands/open waters in the global methane budget.

Primary Convener:  Elaine Matthews, NASA, Ames Research Center, Moffett Field, CA, United States
Conveners:  Dr. Ruth K Varner, PhD, University of New Hampshire, Department of Earth Sciences, Durham, United States, Changhui Peng, University of Quebec at Montreal UQAM, Department of Biology Sciences, Montreal, QC, Canada and Paul J Hanson, Oak Ridge National Laboratory, Environmental Sciences Division and Climate Change Science Institute, Oak Ridge, TN, United States
Chairs:  Paul J Hanson, Oak Ridge National Laboratory, Environmental Sciences Division and Climate Change Science Institute, Oak Ridge, TN, United States and Changhui Peng, University of Quebec at Montreal UQAM, Department of Biology Sciences, Montreal, QC, Canada
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
Co-Sponsor(s):
  • IGBP: International Geosphere-Biosphere Programme -
Index Terms:

0365 Troposphere: composition and chemistry [ATMOSPHERIC COMPOSITION AND STRUCTURE]
0414 Biogeochemical cycles, processes, and modeling [BIOGEOSCIENCES]
1615 Biogeochemical cycles, processes, and modeling [GLOBAL CHANGE]
1836 Hydrological cycles and budgets [HYDROLOGY]

Abstracts Submitted to this Session:

Challenges and Conundrums in Modeling Global Methane Emissions from Wetlands: An Empiricist's Viewpoint (Invited) (61125)
Scott D Bridgham, University of Oregon, Eugene, OR, United States
The Ability of Atmospheric Data to Reduce Disagreements in Wetland Methane Flux Estimates over North America (Invited) (61174)
Scot M Miller1, Arlyn Andrews2, Joshua Simon Benmergui3, Roisin Commane3, Edward J Dlugokencky4, Greet Janssens-Maenhout5, Joe R Melton6, Anna M Michalak7, Colm Sweeney8 and Doug E. J. Worthy9, (1)Carnegie Institution for Science - Stanford, Department of Global Ecology, Stanford, CA, United States, (2)NOAA Earth System Research Lab, Boulder, CO, United States, (3)Harvard University, Cambridge, MA, United States, (4)NOAA Boulder, Global Monitoring Laboratory, Boulder, United States, (5)IES/ Joint Research Centre, Ispra (Varese), Italy, (6)CCCma, Victoria, BC, Canada, (7)Carnegie Institution for Science Washington, Washington, DC, United States, (8)NOAA, Global Monitoring Laboratory, Boulder, United States, (9)Environment Canada Toronto, Climate Research Division, Toronto, ON, Canada
A New Appraisal of Northern Peatlands and Global Atmospheric Methane Over the Holocene (66595)
Glen M MacDonald, University of California Los Angeles, Department of Geography, Los Angeles, United States, James Robert Holmquist, Smithsonian Environmental Research Center, Edgewater, United States, Konstantine Kremenetski, University of California Los Angeles, Los Angeles, CA, United States and Julie Loisel, Texas A&M University, Department of Geography, College Station, TX, United States
Methanogenesis in Peat Bogs – Insights from 14C Data Synthesis and Modeling (68406)
Alison Hoyt, Stanford University, Earth System Science, Stanford, CA, United States, Sunitha R Pangala, Lancaster University, Lancaster Environment Centre, Lancaster, United Kingdom, Laure Gandois, EcoLab France, Castanet Tolosan, France, Alex Cobb, Singapore-MIT Alliance for Research and Technology (SMART), Singapore, Singapore, Fuu Ming Kai, Agency for Science, Research and Technology, Singapore, Singapore, Xiaomei Xu, University of California Irvine, Earth System Science, Irvine, United States, Vincent Gauci, University of Birmingham, Birmingham, United Kingdom, Y. Mahmud, Brunei Heart of Borneo Centre, Bandar Seri Begawan, Brunei, A. Salim Kamariah, Universiti Brunei Darussalam, Biology Programme, Bandar Seri Begawan, Brunei, Jangarun A. Eri, Brunei Forestry Department, Bandar Seri Begawan, Brunei and Charles Franklin Harvey, Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, Cambridge, MA, United States
Understanding Methane Cycling Dynamics across Tropical African Wetland and Upland Ecosystems (79251)
Anya Hopple1, Scott D Bridgham2, Brendan J M Bohannan2 and Kyle Matthew Meyer2, (1)Smithsonian Environmental Research Center, Edgewater, United States, (2)University of Oregon, Eugene, OR, United States
METHANE FLUX OF AMAZONIAN PEATLAND ECOSYSTEMS: LARGE ECOSYSTEM FLUXES WITH SUBSTANTIAL CONTRIBUTION FROM PALM (MARITIA FLEXUOSA) STEM EMISSIONS (75209)
Joost L M Van Haren, University of Arizona, Biosphere 2, Tucson, AZ, United States and Hinsby Cadillo-Quiroz, Arizona State University, Tempe, AZ, United States
Unusually Warm Spring Temperatures Magnify Annual CH4 Losses From Arctic Ecosystems (82715)
Jordan P Goodrich1, Walter C Oechel1,2, Beniamino Gioli3, Patrick Murphy4 and Donatella Zona5, (1)San Diego State University, Global Change Research Group, San Diego, CA, United States, (2)The Open University, Environment, Earth, and Ecosystems, Milton Keynes, United Kingdom, (3)National Research Council, Biometeorology Institute (IBIMET-CNR),, Florence, Italy, (4)San Diego State University, San Diego, CA, United States, (5)San Diego State University, Department of Biology, San Diego, United States
Greenhouse Gas Balance in a Restored and Natural Wetland (63447)
Karina V Schafer, Rutgers University Newark, Department of Earth and Environmental Sciences, Newark, NJ, United States, Peter R Jaffe, Princeton Univ, Princeton, United States, Timothy Hector Morin, Syracuse University, College of Environmental Science and Forestry, Syracuse, United States and Gil Bohrer, The Ohio State University, Department of Civil, Environmental and Geodetic Engineering, Columbus, United States

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