摘要
20 0 0年我国北方春季干旱少雨 ,气温回升快 ,低涡频繁侵入 ,4月 3～ 9日连续 3次冷空气活动 ,造成了北京地区严重的沙尘暴天气。笔者利用卫星云图和中尺度数值模式MM 5 ,分析了该次沙尘暴源地及沙尘输送机制。结果证明 ,北京沙尘暴初始源地为蒙古高原及冷涡移动路径上的沙漠戈壁地区 ;北京周边地区裸露地的沙尘在气旋尾部上升气流的扰动下 ,亦形成了边界层的近距离输送。
North China was drought with little rainfall, and became warm earlier in the spring in 2000. Eddy often arrived. From 3 to 9 April three cold eddies continuously brought a great deal of sand-dust to Beijing. In this paper with cloud map data from satellite and results from Model MM5, the source of this sand-dust storm and the mechanism of sand transportation are analyzed. As a result, it is found that air current from upper reaches brought sand-dust through free atmospheric layer. Moreover, sand-dust from the peripheral bare soil was raised from the end of eddy and brought to Beijing.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2001年第2期1-3,共3页
Research of Environmental Sciences
基金
中国西部干旱区生态环境演变与调控研究项目!(G19990 435 0 5 )
