气象科学2017，Vol.37Issue(6)：753-765,13.DOI:10.3969/2017jms.0012
一次梅雨锋暴雨的边界层热通量输送与湍流动能收支分析
Analysis of heat flux transfer and TKE budget in the boundary layer during a Meiyu rainstorm
摘要
Abstract
A heavy rainfall caused by Meiyu front during July,2007 is simulated by high-resolution mesoscale WRF model to analyze the characteristics of heat flux transportation and Turbulent Kinetic Energy (TKE) in the boundary layer during the event.Results show that the temporal and spatial distribution of heat flux and TKE are different from diurnal change characteristics during the rainstorm event.Latent heat flux appears to be positive-negative-positive as the height above ground grows,while sensible heat flux is mostly minus,with the height of negative center corresponding with that of latent heat changing from negative to positive.The height and duration of the development of TKE increased during the event,with the TKE in the precipitation zone is weaker than in other areas in the near-surface but stronger at 468 m or higher levels.The development of TKE in the precipitation zone transferred mainly from mechanical turbulence generated by shear of the average wind,while buoyancy and viscidity dissipation make the consumption.Turbulent transportation transfers TKE from near-surface to higher levels,contributing to the TKE at upper levels while decreasing TKE at lower levels.The critical height between the negative effect and the positive corresponds to the height of the maximum center of TKE.关键词
梅雨锋暴雨/边界层/热通量/湍流动能Key words
Meiyu rainstorm/Boundary layer/Heat flux/Turbulent kinetic energy分类
天文与地球科学引用本文复制引用
马铮,沈新勇,黄文彦,李小凡,冯涛..一次梅雨锋暴雨的边界层热通量输送与湍流动能收支分析[J].气象科学,2017,37(6):753-765,13.基金项目
科技部国家大气污染专项项目(2016YFC0203301) （2016YFC0203301）
国家重点基础研究发展计划(973计划)项目(2015CB453201 （973计划）
2013CB430103) （）
国家自然科学基金资助项目(41375058 （）
41530427 （）
41475039 （）
41405067) （）
江苏省自然科学基金重点资助项目(BK20150062) （BK20150062）
