摘要
利用常规观测的卫星云图资料、地面资料、探空资料以及北京站的风廓线雷达观测资料,对2017年5月4~5日京津冀区域的一次扬沙、浮尘天气过程进行了分析。研究发现:本次过程京津冀的沙源地为甘肃、内蒙古、蒙古国一带,蒙古低涡底部的高空急流输送是造成京津冀沙尘天气的主要原因。风廓线雷达资料显示,冷空气从中层侵入,中低层切变线出现早于沙尘天气出现2个小时,冷空气的再一次爆发使沙尘天气结束。
Using the satellite cloud image data, ground data, sounding data and wind profile radar observation data of Beijing station, a blowing sand and floating dust weather process of the Beijing- Tian-jin-Hebei region in May 4~5, 2017 is analyzed. The study found that the sand source of the Bei-jing-Tianjin-Hebei region is from Gansu, Inner Mongolia and Mongolia. The high level jet transportation at the bottom of Mongolia low vortex is the main cause of the dust weather in Beijing, Tianjin and Hebei. Wind profile radar data show that cold air has been infiltrated from the middle layer, and the middle and lower layers of shear lines appear as early as two hours before the dust, and the second outbreak of cold air causes the dust to end.
出处
《气候变化研究快报》
2023年第2期361-367,共7页
Climate Change Research Letters
