Aerosol Optical Properties in Beijing Based on Observation by Sun-Photometer

Journal of Atmospheric and Environmental Optics ›› 2018, Vol. 13 ›› Issue (2): 88-96.

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Aerosol Optical Properties in Beijing Based on Observation by Sun-Photometer

MOU Fusheng1, LI Suwen1, LI Ang1, XIE Pinhua1,2, WANG Yang1, XU Jin1, CHEN Hao1, WU Fengcheng1

（1 College of Physics and Electronic Information, Huaibei Normal University, Huaibei 235000, China;
2 Key Laboratory of Environment Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Science, Hefei 230031, China;
3 School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230031, China）

Received:2016-09-07 Revised:2016-09-17 Online:2018-03-28 Published:2018-04-15
Supported by:
Supported by National Natural Science Foundation of China(国家自然科学基金, 41705012, 41475017, 61275151, 91544104), National High Technology Research and Development Program(国家863计划, 2014AA06A511, 2014AA06A508), Anhui Natural Science Foundation(安徽省自然科学基金, 1308085QF124, 1508085QD71), Ahui University of Natural Science Foundation(安徽省高校自然科学基金, KJ2017B013, KJ2015A069)

Abstract

Abstract:

Aerosol optical properties are studied using the data from 2011 to 2014 at Beijing station. It shows the aerosol optical depth in Beijing is high for the whole year, the annual mean of aerosol optical depth (AOD) at 440 nm for the four years are about 0.67±0.70，0.69±0.71，0.73±0.66 and 0.75±0.66, respectively. The average monthly AOD shows similar seasonal variation with a maximum in spring and a minimum in autumn. According to aerosol classification high aerosol level in Beijing is mainly caused by fine particles and there are also coarse dust particles in spring. Fine particles growth is found in four seasons , which is mainly a hygroscopic growth in summer and autumn and a coagulation growth in other seasons. Comparison of aerosol properties between dust and haze condition shows AOD in haze condition is general higher than that in dust condition and AOD at 440nm is 3.7 times than that in dust condition. The back trajectory analysis indicates that air-masses on the dust day are northwest wind across Mongolia grassland and Gobi deserts. The wind speed on the haze day is weak and dominated by southeast and northwest wind, and high aerosol load condition is caused by local accumulation and transportation from other places.

Key words: aerosol optical properties, aerosol classification, sun-photometer

CLC Number:

X513

MOU Fu-Sheng, LI Su-Wen, LI Ang, XIE Pin-Hua, WANG Yang, XU Jin, CHEN Hao, WU Feng-Cheng. Aerosol Optical Properties in Beijing Based on Observation by Sun-Photometer[J]. Journal of Atmospheric and Environmental Optics, 2018, 13(2): 88-96.

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Aerosol Optical Properties in Beijing Based on Observation by Sun-Photometer

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