HR: 17:40h
AN: A14C-07    [Abstracts]
TI: Space-Based Constraints on Hydrocarbon Emissions in East Asia
AU: * Fu, T
EM: tmf@io.harvard.edu
AF: Harvard University, Division of Engineering and Applied Sciences, 29 Oxford Street, Cambridge, MA 02138 United States
AU: Jacob, D J
EM: djj@io.harvard.edu
AF: Harvard University, Division of Engineering and Applied Sciences, 29 Oxford Street, Cambridge, MA 02138 United States
AU: Palmer, P I
EM: pip@env.leeds.ac.uk
AF: Harvard University, Division of Engineering and Applied Sciences, 29 Oxford Street, Cambridge, MA 02138 United States
AU: Chance, K
EM: kchance@cfa.harvard.edu
AF: Harvard-Smithsonian Center for Astrophysics, Atomic and Molecular Physics Division, 60 Garden Street, Cambridge, MA 02138 United States
AB: Formaldehyde (HCHO) columns measured from space by solar backscatter allow quantitative mapping of reactive hydrocarbon emissions. We analyze measurements from the GOME satellite instrument between 1996 and 2001 over East Asia and compare the resulting monthly constraints on hydrocarbon emissions with the latest biogenic, anthropogenic, and biomass burning emission inventories. Multivariate regression, exploiting the spatial and seasonal variations of the HCHO column data, is used to quantify regional contributions from these different emission types. We show that current inventories are too low for anthropogenic emissions in winter and for biogenic and biomass burning emissions in summer. Large HCHO signals are consistently observed in early summer over the North China Plain, implying a large, previously unrecognized source from winter wheat harvesting and crop residual burning.
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0322 Constituent sources and sinks
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005