【作者】 张璐； 包玉海； 玉山； 银山； 戴策乐木格；

【Author】 Lu Zhang;Yuhai Bao;Shan Yu;Shan Yin;Dacelemuge;College of Geoeraphical Science,Inner Mongolia Normal University;Inner Mongolia key laboratory of Remote Sensing and GIS;

【机构】 内蒙古师范大学地理科学学院； 内蒙古自治区遥感与地理信息系统重点实验室；

【摘要】 本文选择1980-2011年逐日降水资料,采用调整后的我国通用的干早等级标准划分标准,对苏尼特左旗草原研究区域内苏尼特左旗气象观测站点(53195)的降水距平百分率进行分析。按不同的时间尺度划分不同的干早等级。结果表明:苏尼特左旗草原十年约有六早,年干早程度有加剧趋势,季干早发生率高达36%,冬季出现特早和重早的频率居各季之首,次之春季,秋季。除春季外,夏、秋、冬都有干旱等级上升趋势,2、4月居各月特早之首,2、4、11月的重特早率均在20%以上,全年7,8,9月无特早,5,6,月干早频率最少为31%,1、2月发生干早的频率最高为47%。总体上,研究区干早频发,干早程度有加剧趋势。更多还原

【Abstract】 The characteristics of drought in Sonid Left Banner were analyzed by using the observed weather data from1980 to 2011 of Sonid Left Banner station to calculate the precipitation anomaly percentage and to accord different time scales to divided different levels of droughtthe results showed that drought occurred in six years every decade at Sonid Left Banner,after 21 centry have been the very severe drought,yearly scale drought levels exist an exacerbating trend;the frequency of seasonal drought is about 36%,frequency of very severe and severe droughts in winter is the first of the four seasons,spring is second.spring is third.Except spring,the drought degree in other seasons become serious.The frequency of very severe drought appears in Tuesday and April in the first of 12 months and the frequency of very severe and severe drought appears in Tuesday,April.November is reached to 20%,July,August and September did not appear the very severe,May and June have th minimum frequency of drought,which is 31%,January and February have th maximum frequency of drought,which is 47%.In sum,droughts is frequently occurred and exist an exacerbating trend in study area.更多还原