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Direct Top-down Estimates of Biomass Burning CO Emissions Using TES and MOPITT Versus Bottom-up GFED InventoryIn this study, we utilize near-simultaneous observations from two sets of multiple satellite sensors to segregate Tropospheric Emission Spectrometer (TES) and Measurements of Pollution in the Troposphere (MOPITT) CO observations over active fire sources from those made over clear background. Hence, we obtain direct estimates of biomass burning CO emissions without invoking inverse modeling as in traditional top-down methods. We find considerable differences between Global Fire Emissions Database (GFED) versions 2.1 and 3.1 and satellite-based emission estimates in many regions. Both inventories appear to greatly underestimate South and Southeast Asia emissions, for example. On global scales, however, CO emissions in both inventories and in the MOPITT-based analysis agree reasonably well, with the largest bias (30%) found in the Northern Hemisphere spring. In the Southern Hemisphere, there is a one-month shift between the GFED and MOPITT-based fire emissions peak. Afternoon tropical fire emissions retrieved from TES are about two times higher than the morning MOPITT retrievals. This appears to be both a real difference due to the diurnal fire activity variations, and a bias due to the scarcity of TES data.
Document ID
20140011121
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1002/jgrd.50624
Authors
Pechony, Olga (Columbia Univ. New York, NY, United States)
Shindell, Drew T. (NASA Goddard Inst. for Space Studies New York, NY United States)
Faluvegi, Greg (Columbia Univ. New York, NY, United States)
Date Acquired
August 27, 2014
Publication Date
July 27, 2013
Publication Information
Publication: Journal of Geophysical Research: Atmospheres
Publisher: Wiley-Blackwell
Volume: 118
Issue: 14
ISSN: 2169-897X
Subject Category
Earth Resources And Remote Sensing
Report/Patent Number
GSFC-E-DAA-TN11377
Funding Number(s)
CONTRACT_GRANT: WBS 281945.02.31.02.52
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
bias
satellite observation
inventories
troposhere
fires
estimates

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