Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 40, Issue 18, Pages 4938-4943Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/grl.50937
Keywords
methane; fires; ENSO; remote sensing
Categories
Funding
- National Aeronautics and Space Administration
- Natural Sciences and Engineering Research Council of Canada
- National Aeronautics and Space Administration (NASA) Earth Observing System (EOS) Program
- National Science Foundation
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Dry conditions from a moderate El Nino during the fall of 2006 resulted in enhanced burning in Indonesia with fire emissions of CO approximately 4-6 times larger than the prior year. Here we use new tropospheric methane and CO data from the Aura Tropospheric Emission Spectrometer and new CO profile measurements from the Terra Measurements of Pollution in the Troposphere (MOPITT) satellite instruments with the Goddard Earth Observing System (GEOS)-Chem model to estimate methane emissions of 4.25 0.75 Tg for October-November 2006 from these fires. Errors in convective parameterization in GEOS-Chem, evaluated by comparing MOPITT and GEOS-Chem CO profiles, are the primary uncertainty of the emissions estimate. The El Nino related Indonesian fires increased the tropical distribution of atmospheric methane relative to 2005, indicating that tropical biomass burning can compensate for expected decreases in tropical wetland methane emissions from reduced rainfall during El Nino as found in previous studies.
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