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| Titel |
Characterization of wildfire NOx emissions using MODIS fire radiative power and OMI tropospheric NO2 columns |
| VerfasserIn |
A. K. Mebust, A. R. Russell, R. C. Hudman, L. C. Valin, R. C. Cohen |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 11, no. 12 ; Nr. 11, no. 12 (2011-06-22), S.5839-5851 |
| Datensatznummer |
250009861
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| Publikation (Nr.) |
 copernicus.org/acp-11-5839-2011.pdf |
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| Zusammenfassung |
| We use observations of fire radiative power (FRP) from the Moderate
Resolution Imaging Spectroradiometer~(MODIS) and tropospheric NO2 column
measurements from the Ozone Monitoring Instrument (OMI) to derive NO2
wildfire emission coefficients (g MJ−1) for three land types over
California and Nevada. Retrieved emission coefficients were
0.279±0.077, 0.342±0.053, and
0.696±0.088 g MJ−1 NO2 for forest, grass and shrub fuels,
respectively. These emission coefficients reproduce ratios of emissions with
fuel type reported previously using independent methods. However, the
magnitude of these coefficients is lower than prior estimates. While it is
possible that a negative bias in the OMI NO2 retrieval over regions of
active fire emissions is partly responsible, comparison with several other
studies of fire emissions using satellite platforms indicates that current
emission factors may overestimate the contributions of flaming combustion and
underestimate the contributions of smoldering combustion to total fire
emissions. Our results indicate that satellite data can provide an extensive
characterization of the variability in fire NOx emissions; 67 %
of the variability in emissions in this region can be accounted for using an
FRP-based parameterization. |
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