HR: 17:15h
AN: B34A-05    [Abstracts]
TI: Methane Emissions from Natural Wetlands in the United States: Satellite-Derived Estimation based on Ecosystem Carbon Cycling
AU: Hiatt, S
EM: shiatt@mail.arc.nasa.gov
AF: California State University, Mail Stop 242-4, Moffett Field, CA 94035 United States
AU: * Potter, C
EM: cpotter@mail.arc.nasa.gov
AF: NASA Ames Research Center, Mail Stop 242-4, Moffett Field, CA 94035 United States
AU: Klooster, S
EM: sklooster@mail.arc.nasa.gov
AF: California State University, Mail Stop 242-4, Moffett Field, CA 94035 United States
AU: Genovese, V
EM: vbrooks@mail.arc.nasa.gov
AF: California State University, Mail Stop 242-4, Moffett Field, CA 94035 United States
AU: Gross, P
EM: pgross@mail.arc.nasa.gov
AF: California State University, Mail Stop 242-4, Moffett Field, CA 94035 United States
AU: Fladeland, M
EM: mfladeland@mail.arc.nasa.gov
AF: NASA Ames Research Center, Mail Stop 242-4, Moffett Field, CA 94035 United States
AB: Wetlands are an important natural source of methane to the atmosphere. The amounts of methane emitted from inundated ecosystems in the United States can vary greatly from area to area. Seasonal temperature and carbon content of soils are principal controlling factors. To calculate the effect of wetlands (and their potential conversion to other land uses) on global greenhouse gas emissions, information on area covered by various wetland types is needed, along with verified projections of spatial variation in net methane emissions. Both of these variables are poorly known, and estimates are largely unavailable at the country level. Nationwide satellite data sets (MODIS and Landsat) for the U.S. have been combined with ecosystem model predictions of monthly net carbon exchange with the atmosphere to produce the first detailed mapping of methane fluxes from natural wetlands on a monthly and annual basis. Ranked in terms of total annual flux, the ten states with the highest predicted emissions are all located in the Great Lakes region and the southern coastal U.S. Eight of the ten states with the highest predicted methane emissions are dominated by woody wetlands.
UR: http://geo.arc.nasa.gov/sge/casa/
DE: 0414 Biogeochemical cycles, processes, and modeling (0412, 0793, 1615, 4805, 4912)
DE: 0426 Biosphere/atmosphere interactions (0315)
DE: 0428 Carbon cycling (4806)
DE: 0429 Climate dynamics (1620)
DE: 0480 Remote sensing
SC: Biogeosciences [B]
MN: Fall Meeting 2005