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| Titel |
Evaluation of NOx emission fluxes over East Asia using model-predicted and OMI-retrieved tropospheric NO2 columns |
| VerfasserIn |
Kyung M. Han, Sojin Lee, Chul H. Song |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250108180
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| Publikation (Nr.) |
 EGU/EGU2015-7923.pdf |
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| Zusammenfassung |
| To evaluate bottom-up NOx emission fluxes of INTEX-B, CAPSS, and REAS v1.11
inventories, CMAQ-simulated tropospheric NO2 columns were compared with OMI-retrieved
tropospheric NO2 columns. For the direct comparison between the two columns, the
averaging kernels retrieved from the KNMI algorithm were applied to the CMAQ model
results. In the study, the two tropospheric NO2 columns showed good spatial and seasonal
correlation with correlation coefficients ranging from 0.71 to 0.96. In terms of the normalized
mean error, the CMAQ-simulated NO2 columns were, on annual average, ~28% smaller than
the OMI-retrieved NO2 columns, indicating the NOx emission fluxes were possibly
underestimated in East Asia. In addition, large absolute differences between the two
tropospheric NO2 columns found over Central East China during winter were investigated
and analyzed with several sensitivity runs (monthly variations in NOx emissions;
different NOx emission fluxes; and reaction probability of N2O5 onto aerosols). |
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