Based on CALIPSO observation data of Level 2 from 2013 to 2015, the Aerosols of arid and semi-arid areas in Northwest China are classified and the annual average frequency of different aerosol under different optical thickness is analyzed. It shows that the dust aerosol is decreasing with the increase of aerosol optical thickness, while the polluted dust frequency of the six types of aerosols is the highest; The frequency of the polluted continental aerosol is mainly in[0.1,0.35], and the frequency increases with the increase of aerosol optical thickness. The frequency of smoke aerosol is mainly concentrated in[0.2,0.4], in the case of different aerosol optical thickness, the frequency is higher than that of the polluted continental aerosol. With the increase of aerosol optical thickness, the frequency tends to increase. In autumn and winter, when the aerosol optical thickness is greater than 0.1, the frequency of the polluted continental aerosol is significantly higher than that of the dust aerosol. In spring, the aerosol optical thickness of Hexi area is higher than that of the other three seasons. In the southern and southeast parts of the study area, the aerosol optical thickness of autumn and winter is higher than that of the spring and summer two seasons. The aerosol optical thickness presents in autumn>spring>summer>winter.
Bai Bing
,
Zhang Qiang
,
Chen Xuhui
,
Liu Yang
,
Liu Fengmin
. Classification and Characteristics of Aerosols in Arid and Semi-arid Areas of Northwest China[J]. Journal of Desert Research, 2019
, 39(5)
: 105
-110
.
DOI: 10.7522/j.issn.1000-694X.2018.00122
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