沙漠与绿洲气象2011，Vol.5Issue(4)：14-19,6.
1961——2009年伊犁雷暴气候特征分析
Analysis on Climatic Characteristics of Thunderstorm in Yili Region during 1961-2009
摘要
Abstract
Based on the surface-meteorological observation data from 10 stations in Yili region from 1961 to 2009,and using the methods of linear trend, EOF and wavelet transform, the temporal and spatial distribution of the thunderstorm weather and its variation features were analyzed. The results showed as the following： （1）The annual mean thunderstorm days was 35.6 d in Yili region during 1961-2009, and it showed the decrease trend in the recent 49 years. （2）The spatial distribution of thunderstorm had the characteristics of obvious vertical and vertical zonality. The peak center of it was located at Zhaoso, the south side of the Wusun Mountains. The area with frequent thunderstorm was also the area with longer duration of it. （3）The thunderstorms occurred mainly from May to August, which accounted for 89.8% of its annual mean days. （4）Further research showed that the time series of annual mean thunderstorm days in Yili region had the cycle of 5-6 a, 9-12 a, 2 a. （5）The fact that the strength of the subtropical high of northern hemispheric intensified, the area of it increased and expanded northward was the one of the primarily reason for obvious reduction of annual mean thunderstorm days in Yili.关键词
伊犁/雷暴/气候特征Key words
Yili/thunderstorm/climatic characteristics分类
天文与地球科学引用本文复制引用
高婧,井立军,井立红,张静,祝小梅..1961——2009年伊犁雷暴气候特征分析[J].沙漠与绿洲气象,2011,5(4):14-19,6.基金项目
新疆气象局青年基金项目（200929）资助. （）
