ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 36 Issue 12 > 2010,36(12):62-67. DOI:10.7519/j.issn.1000-0526.2010.12.009 Prev Next
Comparison of Climatic Characteristics Between Hailstorm and Intense Gust in Jiangxi Province
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Abstract:
Based on the observation data and records at 85 observation stations in Jiangxi Province during 1959-2004, spatialtemporal characteristics of hailstorm and intense gust in Jiangxi are investigated by using multiple statistics. Major results are as follows: Hail often occurs in the central and west parts of the province with four extreme centers, while intense gust occurs in the central and north plains with two centers. In terms of seasonal variations, the temporal distributions of hail is categorized as onepeak type, and is more likely to occur from March to May and most frequent in April. While gust shows a doublepeak distribution, indicating the concentration of gust between March and August, with one peak during the period of March to May and the other peak from June to August. From spring to summer in the past 46 years, the abrupt climate change of gust shows that its frequency has decreased in Jiangxi since 1992, while the interdecadal variation of hail has not demonstrated obvious climate abruption. Hail varies by a 12a scale before 1981 with three periods, while after 1981 it becomes an 18a cycle and at the same time with 4 periods on a 9a scale. The middle to highfrequency variations are dominated for the gust, showing a 12a scale before 1973 and a 6a cycle after 1974. The first mode of EOF indicates that the variation trend is consistent for hail and intense gust. According to the second mode of EOF, the spatial variation of hail and gust in the plain shows a reverse trend in relation to mountainous areas, especially gust in the south Jiangxi.
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