Characteristics of aerosol optical properties in pollution and Asian dust episodes over Beijing, China

被引：84

作者：

Xie, Chenbo ^{[1
,2
]}

Nishizawa, Tomoki ^{[1
]}

Sugimoto, Nobuo ^{[1
]}

Matsui, Ichiro ^{[1
]}

Wang, Zifa ^{[3
]}

机构：

[1] Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Ctr Atmospher Opt, Hefei 230031, Anhui, Peoples R China

[2] Natl Inst Environm Studies, Div Atmospher Environm, Tsukuba, Ibaraki 3058506, Japan

[3] Chinese Acad Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China

来源：

APPLIED OPTICS | 2008年 / 47卷 / 27期

关键词：

D O I：

10.1364/AO.47.004945

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Aerosol optical properties were continuously measured with the National Institute for Environmental Studies (NIES) compact Raman lidar over Beijing, China, from 15 to 31 December 2007. The results indicated that in a moderate pollution episode, the averaged aerosol extinction below 1 km height was 0.39 +/- 0.15 km(-1) and the lidar ratio was 60.8 +/- 13.5 sr; in heavy pollution episode, they were 1.97 +/- 0.91 km(-1) and 43.7 +/- 8.3 sr; in an Asian dust episode, they were 0.33 +/- 0.11 km(-1) and 38.3 +/- 9.8 sr. The total depolarization ratio was mostly below 10% in the pollution episode, whereas it was larger than 20% in the Asian dust episode. The distinct characteristics of aerosol optical proper-ties in moderate and heavy pollution episodes were attributed to the difference in air mass trajectory and the ambient atmospheric conditions such as relative humidity. (C) 2008 Optical Society of America

引用

页码：4945 / 4951

页数：7

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