Dust, Stability and Stratus Cloud Cover over the Subtropical North Atlantic Region
Received date: 2001-11-26
Revised date: 2002-05-08
Online published: 2003-01-18
Supported by
supported by China NKBRSFP roject(G1999043400)and Knowledge Innovation project KZCX2305 funded by Chinese Academy of Sciences
夏祥鳌 , 王明星 , 张仁健 . 北大西洋沙尘与大气稳定度以及层云的关系[J]. 中国科学院大学学报, 2003 , 20(1) : 92 -96 . DOI: 10.7523/j.issn.2095-6134.2003.1.014
Massive dust aerosols from the Northwest Africa exporting to the research region (50°W～20°W, 10°N～25°N) during the summer season, with a peak in July, are regularly ob-served by satellite. Dust aerosols are confined within the layer between two inversions. Themain effect of them is to heat the lower troposphere, but cool the surface, so the presence ofdust may cause a stabilizing effect on the temperature lapse rate, then affect the ocean low-lev-el stratus cover. Attempt to illustrate these relations based mainly on the satellite measure-ment of cloud and dust amount in July for six years (1984～1989). The results show that, inthis location, the presence of dust may influence the stratus cover through media of static sta-bility, although the signal is not easy to be revealed due to a few disturbances of undesirablefactors.
Key words： dust aerosol; stability; stratus
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