甘肃省干热风的气候特征及其对气候变化的响应  

Characteristics of Dry-hot Wind in Gansu Province and Its Response to Climate Change

作　　者：刘德祥[1,2] 孙兰东[1,2] 宁惠芳[1] 

机构地区：[1]中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,中国气象局干旱气候变化与减灾重点开放实验室,甘肃兰州730020 [2]兰州区域气候中心,甘肃兰州730020

出　　处：《冰川冻土》2008年第1期81-86,共6页Journal of Glaciology and Geocryology

基　　金：中国气象局气候变化专项“气候变化对祁连山区冰雪水资源影响的研究”(CCSF2007-26);中国气象局2007年多轨道业务建设项目“气象灾害风险区划与影响评估--沙尘暴风险区划与影响评估”资助

摘　　要：对全省80个站1961—2006年资料统计6—7月干热风次数,采用小波分析其演变周期,用相关方法研究干热风对气候变化的响应.结果表明:甘肃干热风可划分为最重区、较重区、最轻区和无干热风区;近46 a来全省和河西的干热风次数随时间的变化呈增加趋势,小波分析显示出存在准6 a周期演变;干热风气象灾害对气候变化的响应十分敏感,在气候暖干时期干热风强度强,次数多,危害重,而在气候凉湿期强度弱,次数少,危害轻.Based on the data from 80 meteorological stations in Gansu Province from 1961 to 2006, the number of dry-hot wind days in June and July is worked out, their evolution cycle is studied using wavelet analysis, and their response to climate change is revealed. It is found that the dry-hot wind in Gansu Province can be divided into four regions slight i. e., strongest region, stronger region region and no dry-hot wind region. The number of dry-hot wind days in Gansu Province （or in Hexi Corridor） increases in the last 46 years. A quasi six-year evolution period is revealed by the wavelet analysis. The dry-hot wind disaster is very sensitive to climate change. The dry-hot wind disaster is stronger and more dangerous during the warm-dry period and weak and less dangerous during the cold-wet period.

关 键 词：干热风 分布特征 变化 气候变暖影响 甘肃 

分 类 号：P425[天文地球—大气科学及气象学]