YANG Fu-mo1, HE Ke-bin1, LEI Yu1, MA Yong-liang1, YU Xue-chun1, Shigeru Tanaka2, Tomoaki Okuda2, Tamami Iwase2
Chemical characters of atmospheric precipitation in Beijing in years of 2001~2003
China Environmental Science, 2004-05
ISSN: 1000-6923 Language: Chinese
http://www.worldcat.org/oclc/611970175http://en.cnki.com.cn/Journal_en/B-B027-ZGHJ-2004-05.htm"To understand the chemical composition and temporal variations of atmospheric precipitation in Beijing, the precipitation samples were collected and analyzed continuously for two years. In 65 precipitation samples, 12% were acidic; annual precipitation acidity was mainly determined by summer precipitation. SO42-, NH4+, and Ca2+ were the most abundant components with their average concentrations all near or above 200 µg/L. Comparison analysis showed that in late years, the SO42- contribution to precipitation acidity was reduced markedly and its sulfur-pollution character was weaken, while that of NO3- was enhanced markedly. The concentrations of anthropogenic and crustal-elements were all higher in winter and spring while lowest in summer.
Key Words: precipitation chemical composition seasonal variation pollution characteristics Beijing
Funding: Tsinghua University - Keio 3E study of international cooperation projects"
http://en.cnki.com.cn/Article_en/CJFDTOTAL-ZGHJ200405007.htm1.Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China
2.Faculty of Chemistry, Keio University, Yokohama 223-8522, Japan
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