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Evaluation of Space-Based Constraints on Global Nitrogen Oxide Emissions with Regional Aircraft Measurements over and Downwind of Eastern North AmericaWe retrieve tropospheric nitrogen dioxide (NO 2) columns for May 2004 to April 2005 from the SCIAMACHY satellite instrument to derive top-down emissions of nitrogen oxides (NO(x) = NO + NO2) via inverse modeling with a global chemical transport model (GEOS-Chem). Simulated NO 2 vertical profiles used in the retrieval are evaluated with airborne measurements over and downwind of North America (ICARTT); a northern midlatitude lightning source of 1.6 Tg N/yr minimizes bias in the retrieval. Retrieved NO2 columns are validated (r2 = 0.60, slope = 0.82) with coincident airborne in situ measurements. The top-down emissions are combined with a priori information from a bottom-up emission inventory with error weighting to achieve an improved a posteriori estimate of the global distribution of surface NOx emissions. Our a posteriori NOx emission inventory for land surface NOx emissions (46.1 Tg N/yr) is 22% larger than the GEIA-based a priori bottom-up inventory for 1998, a difference that reflects rising anthropogenic emissions, especially from East Asia A posteriori NOx emissions for East Asia (9.8 Tg N/yr) exceed those from other continents. The a posteriori inventory improves the GEOS-Chem simulation of NOx, peroxyacetylnitrate, and nitric acid with respect to airborne in situ measurements over and downwind of New York City. The a posteriori is 7% larger than the EDGAR 3.2FT2000 global inventory, 3% larger than the NEI99 inventory for the United States, and 68% larger than a regional inventory for 2000 for eastern Asia. SCIAMACHY NO2 columns over the North Atlantic show a weak plume from lightning NO(x).
Document ID
20090024808
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Martin, Randall V.
(Dalhousie Univ. Halifax, Nova Scotia, Canada)
Sioris, Christopher E.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Chance, Kelly
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Ryerson, Thomas B.
(National Center for Atmospheric Research Boulder, CO, United States)
Flocke, Frank M.
(National Center for Atmospheric Research Boulder, CO, United States)
Bertram, Timothy H.
(California Univ. Berkeley, CA, United States)
Wooldridge, Paul J.
(California Univ. Berkeley, CA, United States)
Cohen, Ronald C.
(California Univ. Berkeley, CA, United States)
Neuman, J. Andy
Swanson, Aaron
Date Acquired
August 24, 2013
Publication Date
August 11, 2006
Publication Information
Publication: Journal of Geophysical Research
Publisher: American Geophysical Union
Volume: 111
Subject Category
Meteorology And Climatology
Funding Number(s)
CONTRACT_GRANT: NNG04GE15G
Distribution Limits
Public
Copyright
Other

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