基于太阳光度计的天津城区气溶胶光学特性

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Abstract

Based on the data of CE-318 sunphotometer at Tianjin boundary layer station from 2013 to 2014, the distribution characteristics of aerosol optical depth and Ångström exponent were analyzed. The results showed that, the average value of the aerosol optical depth (AOD) under 440nm and 500nm spectral band were 0.99±0.34 and 0.87±0.30, respectively. The monthly average of AOD under 500nm was highest in June 2013 the value equal to 1.41±0.79 and lowest in November 2013 the value equal to 0.49±0.92. For the reason of sand and dust weather the Ångström exponent was lowest in spring which value equal to 0.85±0.32. For the reason of high temperature weather the Ångström exponent was highest in summer which value equal to 1.16±0.29.The urban-industrial aerosol was the dominant type in Tianjin by the analysis of the distribution characteristics of Ångström exponent. By the joint effect of fine mode and coarse mode aerosol, AOD was higher than 2in spring. By the main effect of fine mode aerosol, AOD was higher than 2in summer. And hygroscopic character of aerosol made AOD increased in summer. The situation of AOD higher than 2in winter also by the effect of fine mode aerosol but the partical size was larger than summer. In the condition of haze day the AOD and Ångström exponent were higher than dust day and non-pollution day which value were 1.41±0.68 and 1.17±0.29. In the condition of dust day the AOD was 0.99±0.62 and the Ångström exponent was 0.55±0.22 which was lower than haze day and non-pollution day. In condition of non-pollution day the AOD was lower than dust day and haze day which the value was 0.53±0.46. Increasing with AOD the Ångström exponent had trend of increased at first and decreased subsequently.

Key words： aerosol optical depth Ångström exponent sunphotometer Tianjin

Received: 08 April 2017

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X513

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	LIU Jing-le
	YAO Qing
	CAI Zi-ying
	HAN Su-qin

Cite this article:

LIU Jing-le,YAO Qing,CAI Zi-ying等. Analysis on aerosol optical characteristics with sun photometer in Tianjin[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(11): 4013-4021.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2017/V37/I11/4013

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