沙漠与绿洲气象Issue(1)：45-51,7.DOI:10.3969/j.issn.1002-0799.2015.01.008
阿勒泰地区暖季昼夜降水气候特征
Climate Characteristics of the Diurnal Precipitation in Altay in the Warm Season
摘要
Abstract
Using daily precipitation data from seven weather stations from May to September in 1961-2013, climate statistical characteristics and the change of day-night rainfall in Altay in the warm season was analyzed with mathematical statistics. The results show as follows.(1)In the warm season day and night rainfall spatial distributions were basically consistent in Aletai nearly 50 years, with a decreasing trend from the foothills to river valley plain. In the warm season precipitation and rainy days number in daytime were more than those in nighttime at each station. (2)Rose distribution of day-night rainfall days showed single peak type, and peak value was in July in the whole area.(3)Daily precipitation showed an increasing trend in Aletai, precipitation days number showed a decreasing trend. The rate of increasing of nighttime precipitation was larger, and the rate of decreasing of the days number of nighttime rain wass less. It means intensity of day-night precipitation in the warm season became strengthening, extreme precipitation events increased, and the two kinds of changes were more obviously.(4)The inter-annual variability of nighttime precipitation and its days number were consistent with that of daytime. And that were the most in 1990s, and the least in 1970s. The days number of nighttime rainfall was the most in 1980s, and the least in 2000s. Days of day-night rainfall mutated in 1972. The day and night precipitation mutated in 1983 and 1991.(5)Morlet wavelet analysis of warm season rainfall showed periodic variation of day and night precipitation and their days are different, but there were similarities between them. For the current time, the nighttime precipitation, days of nighttime rainfall,days of daytime rain, are in the periods of less than normal.关键词
昼夜降水/气候特征/阿勒泰地区Key words
diurnal rainfall/climate characteristics/Altay分类
天文与地球科学引用本文复制引用
白松竹,李博渊,黄晓华..阿勒泰地区暖季昼夜降水气候特征[J].沙漠与绿洲气象,2015,(1):45-51,7.基金项目
新疆气象局科研项目（201314）。 （）
