ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 39 Issue 4 > 2013,39(4):453-459. DOI:10.7519/j.issn.1000-0526.2013.04.007 Prev Next
Analysis on Variation Characteristics of Low Visibility Events in the Coastal Areas of Southern Fujian
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Abstract:
The observation data of visibility and relative humility during 2005-2010 from 9 weather stations located in Xiamen, Tong’an, Zhangzhou, Dongshan, Zhangpu, Longhai, Zhao’an, Jinjiang and Chongwu were used to analyze the annual, seasonal and daily variation characteristics of low visibility events seen in the coastal region of southern Fujian Province with the statistical method. Through comparative analyses, it was found that the annual average low visibility was about 6 km and the visibility was better when haze occurred than when mist or fog occurred. During the first half of the year, low visibility lasted for a longer time and the frequency was high. On the contrary, during the second half of the year, low visibility lasted shorter and the frequency was low. Usually, the visibility at 08:00 was the lowest and improved at 14:00 and 20:00. The visibility at 02:00 was better than at 08:00. But Dongshan and Chongwu had poorer visibility at 02:00 than at 08:00 in winter and spring. It is concluded that haze is the primary reason that causes the low visibility events in coastal areas in southern Fujian and the mist is the second reason. All the above reveals that the rapid developing economy in this region has significant impacts on the atmospheric visibility.
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