SATELLITE OBSERVATIONS OF TROPOSPHERIC NO₂ OVER ASIA : ANALYSIS OF SEASONAL VARIATIONS AND COMPARISON WITH MODEL
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- LALITAPORN Pichnaree
- Department of Environmental Engineering, Kyoto University
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- KURATA Gakuji
- Department of Environmental Engineering, Kyoto University
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- MATSUOKA Yuzuru
- Department of Environmental Engineering, Kyoto University
書誌事項
- タイトル別名
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- SATELLITE OBSERVATIONS OF TROPOSPHERIC NO<sub>2</sub> OVER ASIA: ANALYSIS OF SEASONAL VARIATIONS AND COMPARISON WITH MODEL
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抄録
Long-term trends of tropospheric NO2 columns from four satellites, GOME, SCIAMACHY, OMI and GOME-2, are analyzed over the capital cities in Southeast Asia, Japan and China for the period 1996 to 2011. The results show a significant increase in tropospheric NO2 columns over Shanghai during the study period (21.5% yr-1, reference year 1996). The seasonal variability reveals a different pattern between the different city locations. The cities located in low- and mid- latitude show the maximum levels in wintertime and minimum in summertime. Reversely, those cities near Equator give the opposite results. The inter-comparisons between the satellites show reasonably well agreements with the correlations larger than 0.75. The consistency between NOx emissions from several regional and global emission inventories and tropospheric NO2 columns is investigated and give the different results for each city due to the effect of meteorology. The comparison of ground- and satellite-based NO2 are performed for several stations. The results illustrate better relations for OMI and GOME-2 than GOME and SCIAMACHY owing to the differences in satellite overpass time and spatial resolutions. Finally, the results of seasonal variability from GEOS-Chem simulation generally agree well with satellite measurements. However, the model underestimated retrieved tropospheric NO2 columns by the factor of 3-4.
収録刊行物
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- 土木学会論文集Ｇ（環境）
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土木学会論文集Ｇ（環境） 68 (5), I_171-I_182, 2012
公益社団法人 土木学会