地理学报 ›› 2011, Vol. 66 ›› Issue (9): 1179-1190.doi: 10.11821/xb201109003
贺晋云, 张明军, 王鹏, 王圣杰, 王兴梅
收稿日期:
2011-04-15
修回日期:
2011-06-03
出版日期:
2011-09-20
发布日期:
2011-11-04
通讯作者:
张明军(1975-), 男, 教授, 博导, 中国地理学会会员(S110007775M), 主要从事气候变化与冰川研究。E-mail: mjzhang2004@163.com
E-mail:mjzhang2004@163.com
作者简介:
贺晋云(1986-), 女, 硕士研究生, 主要从事全球变化与可持续发展研究。E-mail: hejinyun300@163.com
基金资助:
教育部新世纪优秀人才支持计划项目(NCET-10-0019); 国家自然科学基金项目(41161012); 陇原青年创新人才扶持计划项目; 西北师范大学知识与科技创新工程创新团队项目(NWNU-KJCXGC-03-66)
HE Jinyun, ZHANG Mingjun, WANG Peng, WANG Shengjie, WANG Xingmei
Received:
2011-04-15
Revised:
2011-06-03
Online:
2011-09-20
Published:
2011-11-04
Supported by:
Program for New Century Excellent Talents in University by the Education Ministry of China, No.NCET-10-0019;National Natural Science Foundation of China, No.41161012; Foundation for Young Innovative Scientists in Gansu Province; Knowledge and Technological Innovation Project of Northwest Normal University, No.NWNU-KJCXGC-03-66
摘要: 利用中国气象局整编的1960-2009 年西南地区108 站逐日气温、降水等资料,计算年、月地表湿润指数,并进行标准化,统计极端干旱发生频率,对年际、年代际、季风期和非季风期的极端干旱变化特征进行分析,得出结论:(1) 整体上,四川盆地西南部、横断山区南端、广西南部沿海和贵州北部是近50 年来年极端干旱发生频率明显增加的地区;年代际变化上,20 世纪60-80 年代极端干旱呈逐渐减少趋势,高发区交替出现在东南—西北—东,90 年代下降明显,整个地区都转湿,进入21 世纪后,极端干旱距平呈现正距平,且增幅较大,区域间差异却显著减小。(2) 季风期与非季风期的极端干旱变化有很大差异,季风期极端干旱频率在不断增加,多发生在四川盆地周边海拔较高的山区、广西大部和“帚形山脉”地带,海拔对季风期极端干旱发生频率有一定影响;非季风期缓慢下降,整体偏湿。(3) 通过滑动t 检验和小波分析发现,季风期西南极端干旱在2003 年发生突变,非季风期在1989 年突变,年极端干旱发生频率是季风期和非季风期的突变叠加的结果;年极端干旱存在准5年和准12 年的周期变化。
贺晋云, 张明军, 王鹏, 王圣杰, 王兴梅. 近50 年西南地区极端干旱气候变化特征[J]. 地理学报, 2011, 66(9): 1179-1190.
HE Jinyun, ZHANG Mingjun, WANG Peng, WANG Shengjie, WANG Xingmei. Climate Characteristics of the Extreme Drought Events in Southwest China during Recent 50 Years[J]. Acta Geographica Sinica, 2011, 66(9): 1179-1190.
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