Document Detail


Characteristics of aerosol optical properties in pollution and Asian dust episodes over Beijing, China.
MedLine Citation:
PMID:  18806856     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
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 properties in moderate and heavy pollution episodes were attributed to the difference in air mass trajectory and the ambient atmospheric conditions such as relative humidity.
Authors:
Chenbo Xie; Tomoki Nishizawa; Nobuo Sugimoto; Ichiro Matsui; Zifa Wang
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Applied optics     Volume:  47     ISSN:  1539-4522     ISO Abbreviation:  Appl Opt     Publication Date:  2008 Sep 
Date Detail:
Created Date:  2008-09-22     Completed Date:  2008-10-17     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0247660     Medline TA:  Appl Opt     Country:  United States    
Other Details:
Languages:  eng     Pagination:  4945-51     Citation Subset:  -    
Affiliation:
Atmospheric Environment Division, National Institute for Environmental Studies, Tsukuba, Ibaraki, 305-8506, Japan.
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