温泉县大风气候变化特征的非均一性分析

Non-uniformity Analysis of Gale Climatic Change Characteristics in Wenquan County

利用1985～2011年温泉县大风观测资料,通过数理统计、小波变换和M-K分析,研究了温泉县大风的气候变化特征。结果表明:27年来年大风日数总体上呈减少趋势,年平均大风日数为24 d;大风日数以7月最多,2月最少,以夏季最多,秋季和冬季较少;年大风日数存在6年左右的主周期变化和3年的次周期变化。年大风日数在1988年发生了由多向少的突变。

The climatic features of gales in Wenquan county were investigated by using mathematical statistics, wavelet analysis, and M - K methods based on the gale data of Wenquan county from 1985 to 2011. Results indicated that in recent 27 years the number of gale days was decreased. However the number of the gale days in Wenquan was still more and the annual average was 24 days. It had the most gale days in July, and the least in February. It usually easily happened in summer but not in autumn or winter. From the cycle analysis, the oscillation change of the annual gale days had the main cycle of about 6 years and secondary cycle of 3 years. The annual gale days suddenly changed from more to less in 1988.