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阿不力米提江.阿布力克木,李娜,赵克明,孙鸣婧,闵月.塔里木盆地一次“东灌”沙尘暴大气边界层特征[J].沙漠与绿洲气象,2019,13(5):55~61
塔里木盆地一次“东灌”沙尘暴大气边界层特征
In Southern Xinjiang Basin
投稿时间:2018-08-15  修订日期:2018-10-30
DOI:10.12057/j.issn.1002-0799.2019.05.008
中文关键词:  沙尘暴  边界层  混合层厚度  廓线  南疆盆地
英文关键词:sandstorm  boundary layer, thickness  of mixed  layer, profile, Southern  Xinjiang Basin
基金项目:沙漠基金(Sqj2013007)资助
作者单位
阿不力米提江.阿布力克木 新疆气象台 
李娜 Institute of Desert Meteorology 
赵克明 Institute of Desert Meteorology 
孙鸣婧 Institute of Desert Meteorology 
闵月 Institute of Desert Meteorology 
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中文摘要:
      利用探空、NCEP/NCAR 1°×1°再分析资料、地面气象站观测资料,对南疆盆地2014年10月28日至29日的沙尘暴天气过程前中后大气稳定度、混合层厚度、风、温、湿廓线等边界层特征量进行分析。结果表明:此次天气过程为欧洲脊东移,推动西西伯利亚低槽快速进入北疆地区随后东移翻越东天山进入南疆盆地,造成“东灌”沙尘暴天气;沙尘暴造成边界层特征量表现为K指数减小,沙氏指数增大,理查逊数减小,混合层厚度降低等特征;风向由偏西风转为偏东风,风速则在静风转为30m/s的偏东急流;温度为沙尘暴之前为贴地逆温,之后大气混合比较均匀,相对湿度为先增加后减小,沙尘暴天气是一个降温增湿的过程,边界层风、温、湿廓线都打破了原有分布规律;沙尘暴过程是大气不稳定层结变为稳定层结的过程。
英文摘要:
      Based on the sounding data, NCEP reanalysis data and observation data in Xinjiang, atmospheric stability,thickness of mixed layer,reverse temperature field, reverse temperature thickness and boundary layer characteristics such as wind, temperature, wet profile before and after a sandstorm in Southern Xinjiang Basin are analyzed. Results show that European ridge eastward in 500hPa, pushing the West Siberia trough moving eastward when splitting into north and south branches. The north branch moving fast from the north to south Xinjiang overturn the east Tianshan Mountain cause the sandstorm. Cold high with 1050hPa in sea level pressure was a Westward path. It’s also showed that the K index and Richardson number decreases while the SI index increases, the mixing layer thickness and reverse temperature filed decrease, while the reverse temperature thickness increases and inverse temperature intensity weakens after the sandstorm. The wind shifted from westerly wind to easterly wind, while the wind speed shifted easterly jet to 30m/s from calm wind.The temperature is uniform after the sandstorm while there is aStemperatureSinversion in the surface before, and the relative humidity increases first and then decreases. So the sandstorm weather is a cooling and humidifying process, and the wind, temperature and wet profile of the boundary layer all break the original distribution. The sand storm process affects the development and change the atmospheric boundary layer structure.
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