江剑民,刘荣. 1993. 对我国年、季大气干旱指数的气候跃变分析[J]. 气象学报, 51(2):237-240, doi:10.11676/qxxb1993.031 |
对我国年、季大气干旱指数的气候跃变分析 |
AN ANALYSIS OF THE CLIMATE JUMP ON SEASONAL AND ANNUAL ATMOSPHERIC DROUGHT INDEXES OVER CHINA |
投稿时间:1991-04-15 修订日期:1991-08-09 |
DOI:10.11676/qxxb1993.031 |
中文关键词: |
英文关键词: |
基金项目:国家自然科学基金 |
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中文摘要: |
近来,严中伟等[1]利用COADS及我国的观测资料,分析指出了北半球夏季自北非、印度、我国中部至日本一带,在60年代出现了降水突发性减少的气候跃变.作者曾分析过近30多年来我国的年度大气干旱指数及其年际变化,指出我国大陆长江以北的变化趋势,与Sahel地区、英格兰中部及威尔士的夏季降水变化相类似[2]. |
英文摘要: |
After the regionalization of the winter, summer and annual Atmospheric Drought Indexes (ADI) over China based on the data of monthly precipitation and monthly mean temperature with the orthogonally Rotated Principal Component (RPC) analysis, the Student's "t" test and other statistic tests were applied to the subsampies of the regional ADI over a time span of 1-2 decades.It was emphasized that a brupt changes were also significant for the winter and annual AD1 in the northern part of China besides for the summer. |
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