期刊论文

中文

湖南农业大学学报(自然科学版)

1007-1032

2014

40

6

637-642

10.13331/j.cnki.jhau.2014.06.015

41171075:国家自然科学基金 71273081:国家自然科学基金 2012FJ3019:湖南省科技厅项目 :湖南省重点学科人文地理支持项目

本校为第一机构

全球变暖背景下区域气候变化响应已引起学术界的高度关注,将气候变化与干旱趋势相结合进行研究具有理论意义。利用衡阳盆地1981-2013年的逐日气温和降水量,综合分析衡阳盆地的气候变化特征与干旱发展趋势。结果表明:衡阳盆地的气候呈暖干趋势发展,年平均气温增加0.034 1℃,其中春季升温贡献最大,春季气温年增加0.054 4℃;年降水量约减少0.808 0 mm,呈缓慢减少趋势,以秋季降水的减幅最大,年减少3.335 1 mm;利用综合气象干旱指数(CDI)法计算出干旱频率年增加0.379 9%,其中秋季干旱频率增加最大,年增加0.910 4%,不同等级干旱类型中,以特旱频率增加率最大,年增加0.231 6%。

It is of great theoretic and practical implications to study regional climatic change and drought trend at the background of global warming, which was extensively concerned by academic circles. Climatic change and drought trend were analysed by mathematical statistical method using daily temperature and precipitation data collected from 1981 to 2013 in Hengyang basin. The results showed that the climate in Hengyang basin had a warm dry trend with 0.034 1℃ annual average temperature increase per year, moreover, the increase trend was mostly ded...