Doppler lidar observations of aerosols over Beijing during spring 2011

Abstract

Abstract:

It describes the Doppler lidar observations carried out in the southern suburbs of Beijing on March 21, 2011 to April 19, focusing on the analysis of the aerosol extinction coefficient retrieved by the Fernald method. Combined with data obtained by the radiosonde at the same period, the paper illustrates the characteristics and changes of aerosols in the boundary layer and lower stratosphere. Observational data indicates that in the cloudless and clear day, aerosol extinction coefficient descends gradually from low to high altitude. In cloudy weather, aerosol extinction coefficient increases at the cloud layer. In addition, the low-altitude aerosol extinction coefficient has apparent diurnal variation characteristics that aerosol extinction coefficient in the morning is lower than that of evening. During the experiment, the mean optical thickness from the ground to 10km is 0.52.

Key words: atmospheric optics, lidar, aerosol, Fernald method, optical thickness

JIN lei, WU Song-hua, CHEN Yu-bao, YAN Bao-dong, SONG Xiao-quan, LIU Bing-yi. Doppler lidar observations of aerosols over Beijing during spring 2011[J]. J4, 2013, 30(1): 46-51.

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