摘要
利用1°×1°NCEP再分析资料和探空资料,对2009年6月3日发生在黄淮流域的强飑线天气过程进行诊断分析,并采用WRF模式进行天气过程模拟和进一步研究。结果表明:本次飑线天气是东北冷涡后部横槽引导冷空气南下与南方暖湿气流相遇引发的。地面干线附近是雷暴和飑线的高发区。这次飑线天气发生在高空急流减弱之际、低空急流建立之前。高低空急流的U、V风分量变化对飑线有一定的指示意义。不同阶段的飑线降水和大风出现位置不同。
Using NCEP 1°×1° reanalysis data and soundings data, a severe squall line case on June 3, 2009 in the Yellow River and Huaihe River basins was analyzed, and the case was simulated by the WRF model and studied further. Results showed that squall line was created by the horizontal trough behind the northeast cold vortex leading cold air to a southward movement and meeting with south warm moist air. The area near the ground dry line was a high incidence of thunderstorms and squall lines. Squall line occurred in the occasion of upper-level jet weakening and before the low-level jet establishing. The change of U and V wind component in upper and low level jet had some indicating significance. The locations of precipitation and strong wind in squall line were varied in different stages.
出处
《气象与环境科学》
2012年第3期54-58,共5页
Meteorological and Environmental Sciences
基金
安阳市气象局科研项目(201210)资助
关键词
飑线
干线
急流
数值模拟
squall line
dry line
jet
numerical simulation
作者简介
张玉峰（1975-），男，河南焦作人，工程师，在读研究生，从事天气预报预警工作．E-mail：13240848@qq．com
