HR: 1330h
AN: A52B-0798    [PDF]
TI: Asian emissions of CO: constraints from aircraft and Chinese station data
AU: * Wang, Y X
EM: wang3@fas.harvard.edu
AF: Department of Earth and Planetary Sciences and Division of Engineering and Applied Sciences, Harvard University, Pierce Hall, 29 Oxford St. Harvard University, Cambridge, MA 02138 United States
AU: McElroy, M B
EM: mbm@io.harvard.edu
AF: Department of Earth and Planetary Sciences and Division of Engineering and Applied Sciences, Harvard University, Pierce Hall, 29 Oxford St. Harvard University, Cambridge, MA 02138 United States
AU: Wang, T
EM: cetwang@polyu.edu.hk
AF: Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, China, TU 702, Dept of Civil & Structural Engg. The Hong Kong Polytechnic University, Hung Hom, Kowloon, N/A Hong Kong
AU: Palmer, P I
EM: pip@io.harvard.edu
AF: Department of Earth and Planetary Sciences and Division of Engineering and Applied Sciences, Harvard University, Pierce Hall, 29 Oxford St. Harvard University, Cambridge, MA 02138 United States
AU: Yantosca, B M
EM: bmy@io.harvard.edu
AF: Department of Earth and Planetary Sciences and Division of Engineering and Applied Sciences, Harvard University, Pierce Hall, 29 Oxford St. Harvard University, Cambridge, MA 02138 United States
AB: Previous inversion studies indicate that Chinese anthropogenic emissions of CO are underestimated by current reporting. A 1(degree) x 1(degree) nested-grid capability has been implemented in the GEOS-CHEM global 3-D model of atmospheric chemistry and applied to Asia to better resolve the geographic distribution of CO sources. CO observations from (a) the TRACE-P aircraft mission over northwestern Pacific, and (b) two Chinese ground stations (in Hong Kong and Lin An) during spring 2001 are used in conjunction with an optimal estimation inverse model to improve estimates of Asian emissions of CO. A priori emissions are based on a detailed bottom-up inventory for the observation period. Error budgets for the ground-based and aircraft data are quantified separately. The inversion study indicates a 70% increase in anthropogenic CO emissions from eastern China (east of 110E, and south of 40N), distributed heterogeneously with the largest adjustments required in the south. A posteriori estimates of emissions from biomass burning in Southeast Asia are much lower than a priori values, consistent with conclusions reached in other TRACE-P studies. Integrating data from the ground-based stations with the aircraft results allows for better resolution of CO sources from three sub-regions in eastern China.
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting