近50年来中国北方沙尘暴的分布及变化趋势分析  

Analyses on Distributive Variation and Forecast of Sand-dust Storms in Recent 50 Years in North China

作　　者：钱正安[1] 宋敏红[1] 李万元[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000

出　　处：《中国沙漠》2002年第2期106-111,共6页Journal of Desert Research

基　　金：国家重点基础研究发展规划>"中国北方沙漠化过程及其防治研究"项目(G20000487)资助

摘　　要：为了得到中国北方沙尘暴分布的总体认识，了解它的变化特征和近期动向，利用1952-2000年间中国西北及华北的强及特强沙尘暴资料等进行了分析。主要结论如下：中国北方的沙尘暴源区主要分布在河西走廊和阿拉善高原、南疆盆地南缘以及内蒙古中部三地区；近50年来中国沙尘暴频数变化的特点是，20世纪60～70年代波动上升，80～90年代波动减少，2000年后又急剧上升，未来可能将进入新一轮沙尘暴活动的活跃期；沙尘暴活动的变化与东亚大气环流的年代际变化和生态环境的变化有关。Abstract: The data about sand-dust storms in Northwest and North China from 1952 to 2000 have been an-alyzed to get a comprehensive knowledge of distribution of sand-dust storms in China and to further under-stand their changing features and recent tendency. The sand-dust storm original sources in Northwest andNorth China mainly distribute in three regions: Hexi Corridor of Gansu Province and Alxa Plateau,south- ern rim of South Xinjiang Basin and central Inner Mongolia. The features on frequency variation of sand-dust storms in recent 50 years are as follows: a fluctuating increase during 1960s-1970s, a fluctuating de-crease during 1980s-1990s and a rapid increase after the year of 2000. In the future, sand-dust stormsmay enter a new active period. The variation of sand-dust storm activities has a close relationship with thedecadal changes of East Asia atmosphere circulation and changes of ecological environment.

关 键 词：沙尘天气 沙尘暴源地 年代际变化 

分 类 号：P445.4[天文地球—大气科学及气象学]