摘要
20 0 0年春天北京出现多次沙尘天气 ,多为扬沙和浮尘。从北京 5 0a的沙尘天气观测资料分析 :① 71%为扬沙 ,浮尘和沙尘暴分别占 2 0 %和 9%,沙尘为就地起沙 ,而沙尘暴和浮尘则来自内蒙古高原中部农牧交错地区 ;②风沙天气是呈波动式减少的 ,其中可以分出 4个 11～ 14a的周期性变化 ,2 0 0 0年 ,进入新的一轮变化周期 ,这一轮的风沙天气仍以扬沙为主 ,沙尘暴强度很弱。从过去的变化规律看 ,至少在未来的 4～ 5a之内 ,不会发生类似去年沙尘天气猛增的现象。继续绿化首都的环境 ,减少就地起沙 ;在沙尘暴和浮尘源区划定旱作农业北界 ,科学地实施“退耕还林还草”是解决北京风沙问题的关键。
There had records of special strong dust storm in Beijing since 400 A D. During the high frequent occurring periods of special strong dust storm in Beiwei, Min and Qing dynasties, the special strong dust storm often occurred in arid climate condition, but there were some exception examples. The period of special strong dust storm occurrence had a directional relationship with the land's development and the destruction of trees nearby Beijing. Since Beijing became the capital of new China, the government had been paying attention to control environment, so the dust climate in Beijing decreases, particularly the special strong dust storm does not exist nearly.
出处
《中国沙漠》
CSCD
北大核心
2001年第4期402-407,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 (G2 0 0 0 0 487)资助
