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1971-2010年茶陵县大风气候特征分析


□ 谢露霞蔡海朝 施徐忠等

谢露霞1 蔡海朝2 施徐忠1 祝光明3

(1湖南省茶陵县气象局,湖南茶陵 412400; 2娄底市气象局; 3怀化市气象局)

摘要  基于1971—2010年茶陵县地面气象观测资料,使用线性倾向估计法、Mann-Kendall突变检验等方法分析茶陵县近40年大风天气的气候变化特征。结果表明:近40年茶陵县年大风日数呈减少趋势,减少率为-0.967 d/10 a,近10年转为非活跃期。主导风向季节性差异明显,春、秋、冬季盛行WNW风和NW风,夏季SSW风加强,具有明显的季风特性。茶陵县大风日数月变化呈多波动型,第1峰出现在3月,第2峰出现在7月,第3峰出现在10月,最少月为9、11月,大风主要集中在3—5月。

关键词  大风;Mann-Kendall检验;气候特征;湖南茶陵;1971—2010年

中图分类号   P425.47    文献标识码  A    文章编号  1007-5739(2011)17-0029-02

Characteristics of Gale in Chaling County From 1971 to 2010

XIE Lu-xia 1  CAI Hai-chao 2  SHI Xu-zhong 1  ZHU Guang-ming 3

(1 Chaling Meteorological Bureau of Hunan Province,Chaling Hunan 412400; 2 Loudi Meteorological Bureau; 3 Huaihua Meteorological Bureau)

Abstract  Based on Chaling meteorological observation data from 1971 to 2010,characteristics of windy weather climate change in recent 40 years in Chaling County were County analyzed by using linear regression and Mann-Kendall technique.The results showed that the gale days in Chaling County was decreasing at the trend rate of -0.967 d/10 a,recent 10 years into non-active period. Seasonal differences of the prevailing wind direction were significant,the prevailing winds were NW and WNW in spring,autumn and winter,but SSW wind was strengthened in summer,There-fore,it had obvious the monsoon feature in Chaling County.Gale days monthly change was more volatile type in Chaling County,it was the first peak in March,the second peak in July,and the third peak in October,the gale happened mainly from March to May,but at least in September and November.

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