气象Issue(1)：38-47,10.DOI:10.7519/j.issn.1000-0526.2014.01.005
2009年豫南一次强暴雨过程的位涡方程诊断分析
Diagnostic Analysis on Potential Vorticity Budget of One Severe Torrential Rain Process in Southern Henan in 2009
摘要
Abstract
Using mesoscale WRF model,conventional meteorological data and NCEP/NCAR reanalysis da-ta,the severe rainstorm process from 28 to 30 August in Henan Province is simulated and diagnosed with the equation of potential vorticity budget.Using the simulation results,this paper diagnoses the rainstorm by the potential vorticity and potential vorticity budget.The results show that WRF model has good simu-lation results to severe rainstorm.The simulated intensity and location of the rainstorm is well consistent with the observation.Potential vorticity can reflect the main dynamic and thermodynamic characteristics of the rainstorm.High potential vorticity value area has a better correlation with the rainstorm center,which is located in the southeast of the high potential vorticity area.The various items of potential vorticity budget can well show the main dynamic and thermodynamic characteristics of the rainstorm.The potential vorticity in the low-middle atmosphere increases locally with the large value area corresponding to the rain-storm center in the process of rainstorm developing.Among the items of the potential vorticity budget,the latent heat and the horizontal advection and vertical transportation and friction are the main contribution i-tems ,of which the horizontal advection and the latent heat contribute positively to the local changes of po-tential vorticity.The latent heat makes the potential vorticity gradually increase.The horizontal advection is helpful for the potential vorticity to gather to the convergence zone of the flow field.The vertical trans-portation and friction make the negative contribution to the local changes of potential vorticity.The verti-cal transportation can transfer the potential vorticity from the lower to the high-level and reduce the low-level potential vorticity.Under the influence of the friction,the potential vorticity in low-level is dissipa-tived and reduced.关键词
暴雨/数值模拟/位涡/位涡收支Key words
torrential rain/numerical simulation/potential vorticity/potential vorticity budget分类
天文与地球科学引用本文复制引用
赵小平,沈新勇,朱晶晶,庆涛,郭学峰..2009年豫南一次强暴雨过程的位涡方程诊断分析[J].气象,2014,(1):38-47,10.基金项目
国家重点基础研究发展计划项目（2013CB430103和2011CB403405）及国家自然科学基金项目（41075039、41375058和41175065）共同资助 （）
