2021年京津冀地区一次典型回流沙尘天气多元资料分析  

Analysis of Typical Circumfluence Dust Weather Characteristics based on CALIPSO Satellite and Other Multi-source Data

作　　者：王鹤婷 WANG Heting(Langfang Meteorological Bureau,Langfang,Hebei 065600)

机构地区：[1]廊坊市气象局,河北廊坊065600

出　　处：《现代农业研究》2023年第1期133-138,共6页Modern Agriculture Research

基　　金：廊坊市气象局自立课题“春季典型沙尘回流过程特征及预报指标分析”(项目编号:2021-16)。

摘　　要：利用CALIPSO卫星观测资料和ERA5再分析资料等多元观测资料对2021年3月28~30日京津冀地区发生的一次沙尘回流天气进行分析,结果表明:回流阶段沙尘传输高度较强沙尘阶段有所降低,集中在3km及以下,由深达700hPa偏南风输送而来,该阶段沙尘浓度较低,风速较小。与正面传输强沙尘阶段对比,相对涡度、位势涡度、水平螺旋度的极端性较弱,但回流阶段沙尘落区附近同样为负水平螺旋度中心,近地面位势涡度转为正值,相对涡度具有不对称性。Using CALIPSO satellite observation data and ERA5 reanalysis data and other multiple observation data, we analyzed a dust reflux weather in the Beijing-Tianjin-Hebei region from March 28 to 30, 2021. The results show that the sand dust transmission height in the reflux stage is strong, the sand dust stage is reduced, concentrated at 3km and below, and transported by the southerly wind with a depth of 700hPa. In this stage, the sand dust concentration is low and the wind speed is small. Compared with the stage of strong dust transport in the front, the extremes of relative vorticity, potential vorticity and horizontal helicity are weak, but in the reflux stage, the center of negative horizontal helicity is also near the dust falling area,the near ground potential vorticity turns to positive, and the relative vorticity is asymmetric.

关 键 词：CALIPSO ERA-5再分析资料 水平螺旋度 沙尘回流 

分 类 号：P445.4[天文地球—大气科学及气象学]