Adjoint Inverse Modeling of Dust Emission and Transport over East Asia
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概要
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A fbur-dimensional variational (4D-Var) data assimilation system for a regional dust model is applied to a heavy dust event which occurred between 30 March to 4 April 2007 over eastem Asia. The verdcal profiles of the dust extinction coefficients derived from 5 NIES LIDAR observation sites are directly assimilated. Themodeled dust extinction coefficients are improved considerably after assimilation. Assimilation results increase dust emissions over the Gobi Desert and Mongolia considerably; especially between 29 and 30 March. The heavy dust event is causged by the heavy dust uplift flux over the Gobi Deseit and Mongolia during those days. We obtain the total optimized dust emissions of 57.9Tg (57.8%laiger than before assimilation). We also confimed that the assimilated model results agreed with OMI aerosol index and WMO SYNOP report, and Lidar-4DVAR system has a potential to improve the accuracy of Asian dust emission/ transport model.
- 社団法人 大気環境学会の論文
社団法人 大気環境学会 | 論文
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