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| Vertical Distribution Characteristics of Aerosol over East Asia Based on CALIPSO Data |
| Received:May 28, 2019 Revised:June 25, 2019 |
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| DOI：10.7643/ issn.1672-9242.2019.06.021 |
| KeyWord:CALIPSO data East Asia aerosol vertical distribution |
| Author | Institution |
| SU Xing-tao |
1.Beijing Institute of Applied Meteorology, Beijing , China |
| ZHENG Jun |
2.32039 Troops of PLA, Beijing , China |
| LI Xue-gang |
2.32039 Troops of PLA, Beijing , China |
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| Abstract: |
| Objective To analyze the vertical distribution characteristics of aerosols over East Asia. Methods Based on the CALIPSO spaceborne laser radar data from 2006 to 2012 and the analysis result of the aerosol optical depth, the representative longitude and latitude bands were selected to study the vertical distribution of aerosols in the eastern coastal areas of East Asia and the vertical distribution of dust aerosols in East Asia-North Pacific region. Ulteriorly, three representative grid points were selected to study the vertical distribution of aerosols in North China and South China, and the vertical distribution of dust aerosols in the Taklimakan Desert. At last, the vertical distribution fitting curves were carried out. Results On the average, the aerosols over East Asia mainly appeared near the ground except for a few areas in a few months. The aerosol extinction coefficient generally decreased exponentially with height above the certain height in the eastern coastal areas of China. The dust extinction coefficient of the dust aerosol decreased almost linearly with height in the dust source area roughly from the ground to the middle layer of the troposphere. The vertical distribution of aerosol had apparent inter-monthly variation and regional difference. In the mid-latitude area, the transmission of Asian dust aerosols between the North Pacific was stronger in January to May. Conclusion CALIPSO data of high vertical resolution can be used as a powerful tool for fine analysis of aerosol vertical distribution. |
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