沙漠与绿洲气象2016，Vol.10Issue(2)：18-24,7.DOI:10.3969/j.issn.1002-0799.2016.02.003
干侵入对江淮流域一次强飑线过程的作用分析
Analysis of Impact of Dry Intrusion in a Strong Squall Line Process in Eastern China
摘要
Abstract
Using the NCEP/NCAR reanalysis data, radar and satellite data in this paper the synoptic characteristics of a strong squall line process in eastern China during 30th~31st July, 2014 were analyzed. The mechanism of dry intrusion in the process were revealed. The results indicate that:the mid-level stairs-shape trough introduced dry-cold air from the high-level superimposed on the low-level warm air, the atmospheric instability enhanced and unstable energy accumulated; low level shear line prompted unstable energy released, it was an important trigger mechanism for the squall line. The analysis results of dry intrusion show that: in this squall line process, dry intrusion originated from downdraft behind the high-level trough, wind adjustment at the bottom of dry intrusion urged the squall line to change the moving direction. Dry intrusion was expanded and strengthened during the development of squall line;Dry intrusion made air over the squall line came colder and dryer and increased atmospheric instability. Low equivalent temperature air under dry intrusion mixed with high equivalent temperature air inside the squall line, it is the important reason for squall line to maintain for a long time.关键词
飑线/干侵入/水汽图像/结构特征/作用机制Key words
squall line/dry intrusion/water vapor images/structural feature/mechanism分类
天文与地球科学引用本文复制引用
崔强,王春明,张云..干侵入对江淮流域一次强飑线过程的作用分析[J].沙漠与绿洲气象,2016,10(2):18-24,7.基金项目
国家自然科学基金资助项目(41275128). （41275128）
