气象科学2017，Vol.37Issue(2)：222-230,9.DOI:10.3969/2016jms.0014
分层气流条件下地形降水的二维理想数值试验
Two-dimensional idealized numerical experiments on the orographic rainfall with a stratified flow over mountain
摘要
Abstract
By using Weather Research and Forecast model (WRF v.3.5),a series of two-dimensional numerical experiments were carried out under the conditionally unstable stratification to investigate the effect of different height,wide terrain and basic air currents of different directions on the rainfall mode and distribution,when the stratified air currents (uniform distribution of the two layer currents with different wind velocity and wet buoyancy frequency) flow over a terrain.Results show that the terrain gravity wave is the main mechanism to trigger the convection,and the features (amplitude and wavelength) and propagation of the terrain gravity wave are affected by the terrain and environmental flow.When the strong air currents flow over the high and steep mountain,it is easier to recognize the gravity wave located in the lee side of mountain,and a number of types of precipitation modes can be detected,or vice versa.The strength and distribution of rainfall depend on the angle between air currents and mountains because of changes in forced uplift rate and wave stability.关键词
地形/分层气流/重力波/降水/数值试验Key words
Orography/Stratified flow/Gravity wave/Rainfall/Numerical experiments分类
天文与地球科学引用本文复制引用
杨婷,闵锦忠,张申龑..分层气流条件下地形降水的二维理想数值试验[J].气象科学,2017,37(2):222-230,9.基金项目
国家重点基础研究发展计划(973计划)项目(2013CB430102) （973计划）
国家自然科学基金重点资助项目(41430427) （41430427）
江苏省高校自然科学重大基础研究项目(11KJA170001) （11KJA170001）
