沙漠与绿洲气象2025，Vol.19Issue(4)：28-36,9.DOI:10.12057/j.issn.1002-0799.2409.23003
春季塔里木河流域浮尘天气与副热带西风急流的联系
Relationship between the Spring Float Dust over the Tarim River Basin and the Subtropical Westerly Jet Stream
摘要
Abstract
Using NCEP/NCAR(National Centers for Environmental Prediction/National Center for Atmospheric Research)atmospheric reanalysis data and monthly records of floating dust days in the Tarim River Basin from 1988 to 2021,this study investigates the variation characteristics of the subtropical westerly jet stream(20°-40°N,70°-95°E)and its relationship with floating dust weather in the basin during spring.The results indicate a northward shift in the axis of the subtropical westerly jet stream during spring,accompanied by a weakening trend in jet intensity over the years.The interannual zonal position of the jet stream axis was significantly negatively correlated with the interannual variations of floating dust days in the basin.In years with more floating dust events in spring,the subtropical westerly jet stream shifts southward compared to years with fewer dust events.Additionally,the zonal wind speed at 200 hPa on the northern side of the jet is relatively high,with a particularly pronounced increase over the Tarim River Basin.The distribution of wind speed and geopotential height fields at 500 and 850 hPa also contributes to an increase in surface wind speeds in the basin.As the upper-level westerly wind speed increases,momentum is transferred downward,causing strong surface winds in the Tarim River Basin,which leads to the frequent occurrence of floating dust weather.关键词
浮尘天气/西风急流/合成分析Key words
floating dust weather/westerly jet stream/composite analysis分类
天文与地球科学引用本文复制引用
李红军,马玉芬,姚梦莹,谢欣芮,王敏仲..春季塔里木河流域浮尘天气与副热带西风急流的联系[J].沙漠与绿洲气象,2025,19(4):28-36,9.基金项目
"天山英才"培养计划—科技创新团队(天山创新团队)项目(2022TSYCTD0007) （天山创新团队）
新疆维吾尔自治区杰出青年科学基金项目(2022D01E07) （2022D01E07）
