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《热带气象学报(英文版)》 2009-01
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STUDY ON THE CHEMICAL CHARACTERISTICS OF POLLUTING FOG IN GUANGZHOU AREA IN SPRING

WU Dui, LI Fei 1, DENG Xue-jiao 1, BI Xue-yan 1, WANG Xin-hua 2 HUANG Xiao-ying 3 (1. Institute of Tropical and Marine Meteorology, CMA, Guangzhou 510080 China; 2. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640 China; 3. Guangdong Meteorological Observatory, Guangzhou 510080 China)  
Samples of fog water collected in the area of Guangzhou during February, March and April of 2005 are used in this work to study the chemical composition of fog water in polluting fog there. Three typical episodes of polluting fog are analyzed in terms of ionic concentration and their possible sources. It is found that the concentration of various ions in fog water is much higher than those in rainwater. Fog not only blocks visual range but contains liquid particles that result in high degree of pollution and are very harmful to human health. SO4= is the anion with the highest concentration in fog water, followed by NO3-. For the cation, Ca++ and NH4+ are the highest in concentration. It is then known that rainwater is more acidic than fog water, indicating that ionic concentration of fog water is much higher than that of rainwater, but there are much more buffering materials in fog water, like NH4+ and Ca++. There is significant enrichment of Ca++, SO4=, and Mg++ in fog water. In the Guangzhou area, fog water from polluting fog is mainly influenced continental environment and human activity. The episodes of serious fog pollution during the time have immediate relationships with the presence of abundant water vapor and large amount of polluting aerosol particles.
【Fund】: Natural Science Foundation of China (40375002 40418008 40775011 U0733004);; Project 863 (2006AA06A306 2006AA06A308);; National Basic Research Program of China (973 Program):2005CB422207;; Natural Science Foundation of Guangdong Province (033029);; Project of Key Scientific Research of Guangdong Province (2004A30401002 2005B32601011);; Project of Applied Fundamental Research of Guangzhou (2004J1-0021)
【CateGory Index】: X51
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