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| Temporal evolution of the boundary layer height and contribution of dust devils to dust aerosols |
| LUO Han1, HAN Yong-xiang1, LI Yan-ying2 |
1. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China;
2. Wuwei Meteorological Bureau in Gansu Province, Wuwei 733000, China |
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Abstract By using the method of dry adiabatic curve,the daily maximum convective boundary layer height (CBLmax) in Dunhuang was calculated and the influence factors were also analyzed.Then the dust devil contribution to dust aerosols were estimated.The results showed that the CBLmax had obviously the annual variations with the single-peak distribution from a minimum in December to a maximum in May.The annual average of CBLmax was 2.2km with an extreme height of nearly 6km.Thermal factors played a dominant role in the CBLmax variation,and cloud amount could affect the variation of CBmax.More than 54.4% amount of annual dust aerosols was contributed by dust devils.
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Received: 02 December 2016
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