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| 乌兰布和沙漠东北部干旱指数的变化特征 | |
| 引用本文： | 肖彩虹,郝玉光,马学献,郭承德.乌兰布和沙漠东北部干旱指数的变化特征[J].防护林科技,2008(2):4-6. |
| 作者姓名： | 肖彩虹 郝玉光 马学献 郭承德 |
| 作者单位： | 1. 西北农林科技大学,陕西,杨凌,712100;中国林科院沙漠林业实验中心 2. 中国林科院沙漠林业实验中心 3. 内蒙古磴口县林业局 4. 磴口县农业技术推广中心 |
| 摘 要： | 利用磴口县1954-2005年的降水、蒸发资料，分析该地区四季干旱指数的变化特征。研究表明，该地区气候以干旱为主，且持续时间长，最长达14a之久。冬季与春季以重旱为主，重旱频率分别为40．4％与36．5％；夏季以中旱为主，中旱频率为38．5％；秋季重旱与中旱频率一致，为32．7％。这种气候特点与该地区降水主要集中在夏季有关。以年代际划分，70年代春季干旱最为严重，80年代夏季干旱最为严重，60、90年代秋季干旱最为严重，60、80及90年代冬季干旱最为严重。 |
| 关 键 词： | 乌兰布和沙漠东北部 干旱指数 变化特征 |
| 文章编号： | 1005-5215(2008)02-0004-03 |
| 修稿时间： | 2007年10月12 |
Change of Drought Index in Dengkou County in Northeast of Wulanbuhe Desert |
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| XIAO Cai-hong,HAO Yu-guang,Ma Xue-xian,GUO Cheng-de.Change of Drought Index in Dengkou County in Northeast of Wulanbuhe Desert[J].Protection Forest Science and Technology,2008(2):4-6. | |
| Authors: | XIAO Cai-hong HAO Yu-guang Ma Xue-xian GUO Cheng-de |
| Institution: | XIAO Cai-hong ,HAO Yu-guang ,Ma Xue-xian ,GUO Cheng-de ( 1. Northwest Sci-Tech Univ. of A ＆ F,Yangling 712100, Shaanxi, China ;2. Experimental Center of Desert Forestry, CAF ; 3. Forestry Bur. ,Dengkou County,Inner Mongolia; 4. Agricultural Technology Popularization Station, Dengkou County) |
| Abstract: | Based on the precipitation and evaporation data of Dengkou county meteorological station from 1954 to 2005,the variety characteristic of drought index of four seasons are analyzed.The result shows that Dengkou's climatic is mainly drought,lasting long time and the longest one is 14 years.Heavy drought is dominant in winter and spring,the frequency of heavy drought is 40.4% and 36.5% respectively;it is mostly that moderate drought occurrs in summer,the frequency of moderate drought is 38.5%;the frequency of heavy drought is 32.7% as same as moderate drought in autumn.The cause is precipitation mainly concentrating in summer.Classifing by decade,drought is the most serious in spring of the 1970's,summer of the 1980's,autumn of the 1960's,the 1990's,winter of the 1960's,the 1980's and the 1990's. |
| Keywords: | northeast of Wulanbuhe desert drought index change |
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