SPATIAL AND TEMPORAL VARIATIONS OF EVAPORATION OVER SOUTH CHINA IN AUTUMN |
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Authors: | XIAO Wei-jun LIANG Yu-qiong HE Ju-xiong and CHEN Bing-hong |
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Institution: | 1. Guangzhou Central Meteorological Observatory, Guangzhou 510080 China;Research Center for Monsoon and Environment / Department of Atmospheric Sciences, Sun Yat-Sen University, Guangzhou 510275 China 2. Research Center for Monsoon and Environment / Department of Atmospheric Sciences, Sun Yat-Sen University, Guangzhou 510275 China 3. Guangzhou Central Meteorological Observatory, Guangzhou 510080 China |
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Abstract: | The spatial and temporal variations of the instrument-based evaporation and actual evaporation
in autumn during a 45-year period from 1960 to 2004 are studied using the observation data from 66
stations over South China. The results reveal that there are two main anomalous centers of the
instrument-based evaporation in autumn in the central and northwestern parts of South China respectively.
The instrument-based evaporation over the central part of South China in autumn experiences not only a
decreasing trend but also a main interdecadal variation. The solar radiation is best correlated with the
instrument-based evaporation among all affecting factors. For the actual evaporation, two main anomalous
centers are located at the central and western parts of the South China respectively. The actual evaporation
over the two regions illustrates an interannual variation. Among the affecting factors, precipitation is the
most remarkable. The actual evaporation is usually 40 percent of the instrument-based one, and the overall
rate has a slightly increasing trend from the southern part to the northern part of the South China in
autumn. |
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Keywords: | South China autumn evaporation spatial and temporal variation |
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