%0 Journal Article
%T 边界层急流与地形在密云局地暴雨过程中的作用研究<br>Study on the Role of Low Level Jet and Topography in Local Rainstorm Process in Miyun
%A 闫霜
%J Climate Change Research Letters
%P 139-148
%@ 2168-5703
%D 2024
%I Hans Publishing
%R 10.12677/CCRL.2024.131015
%X <span style=\"font-size:14px;\">利用常规观测资料、雷达等资料，对密云区2016年8月12日局地暴雨天气进行分析。研究结果表明，此次暴雨天气是在高空短波槽和低空切变背景下，由边界层急流和地形触发共同影响造成的。副高的稳定少动为此次暴雨提供了充分的水汽条件。高温高湿条件所形成的不稳定层结，在边界层西南急流和地形的强迫抬升动力条件下释放能量。另外，边界层急流与地形的相互作用能够加强辐合抬升，配合山谷风改变的热力条件，最终触发暴雨形成。</span><br />
<span style=\"font-size:14px;\">Using the intensified observation data and radar data to analyze the heavy rain on Aug. 12, 2016 in Miyun, the results show that the rainstorm is caused by the combination of low level jet and topo-graphic trigger under the background of upper short-wave trough and lower shear. The stable and low movement of the subtropical high provided sufficient water vapor conditions for the rainstorm. The unstable stratification formed by high temperature and high humidity releases energy under the forced uplift of southwest jet and terrain in the boundary layer. In addition, the interaction between the boundary layer jet and the topography can strengthen the convergence and uplift, and with the changing thermal conditions of the valley wind, the formation of heavy rain is finally triggered.</span>
%K 暴雨，边界层急流，地形<br>Heavy Rain
%K Low Level Jet
%K Topography
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=79652