ANALYSIS OF THE CHARACTERISTICS OF SUSTAINED TORRENTIAL RAINS IN JUNES DURING 1958-2000 |
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| Authors: | DING Zhi-ying CHANG Yue ZHU Li and HE Jin-hai |
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| Institution: | 1. Jiangsu Key Laboratory of Meteorological Disaster, NUIST, Nanjing 210044 China;Department of Atmospheric Sciences, NUIST, Nanjing 210044 China
2. Jiangsu Key Laboratory of Meteorological Disaster, NUIST, Nanjing 210044 China;Department of Atmospheric Sciences, NUIST, Nanjing 210044 China;Weather Bureau of Guangzhou, 510080 China |
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| Abstract: | Day-to-day precipitation data of Junes during the 43 years of 1958-2000 from stations to the
south of Yangtze River are used to divide regions and run statistical analysis of sustained torrential rainfall
processes. A preliminary analysis is then made based on it and the results show that June is the month in
which torrential rains in the southern half of China take place frequently and sustained torrential rains
occur at the same time in South China and the area to the south of Yangtze River. In addition, the analysis
gives the basic features of sustained torrential rains of June in China and their interannual variability
patterns, with the suggestion that the amount of these events increases significantly after the 1990s. Lastly,
the sustained torrential rains occurring in Junes of 1994, 1998 and 2005 in the southern half of China are
taken as examples in the research on the basic patterns and formation mechanisms of the evolution of
double rain-bands during the rain season in South China and the area to the south of Yangtze River. The
analysis shows that the large scale environment field in which sustained torrential rains occur is related to
the stable sustaining of the South Asia High and upper level jet streams. |
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| Keywords: | sustained torrential rains South Asia High upper level jets South China dual rain bands |
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