张振东,魏鸣,王皓.利用地基GPS水汽监测系统对一次强对流性降水过程的综合分析.气象科学,,(): ZHANG Zhendong,WEI Ming,WANG Hao.Comprehensive analysis of a severe convective precipitation based on ground-based GPS water vapor monitoring system.Journal of the Meteorological Sciences,,():
利用地基GPS水汽监测系统对一次强对流性降水过程的综合分析
Comprehensive analysis of a severe convective precipitation based on ground-based GPS water vapor monitoring system
投稿时间:2012-03-06  修订日期:2012-07-26
DOI:10.3969/2012jms.0146
中文关键词:  GPS-PWV  卫星云图  强对流降水  WRF模拟
英文关键词:GPS-PWV  Satellite image  Severe convective precipitation  WRF model simulation
基金项目:高校博士点专项科研基金(20093228110002);江苏省高校自然科学重大基础研究项目(10KJA170030);灾害天气国家重点实验室开放课题(2010LASW-A01);北极阁基金(BJG201001);江苏省2011年度普通高校研究生科研创新计划项目(CXZZ11_0617)
作者单位E-mail
张振东 南京信息工程大学 大气物理与大气环境重点实验室, 南京 210044  
魏鸣 南京信息工程大学 大气物理与大气环境重点实验室, 南京 210044 njueducn@126.com 
王皓 南京信息工程大学 大气物理与大气环境重点实验室, 南京 210044  
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中文摘要:
      用江苏省地基GPS水汽监测系统得到的大气可降水量资料(PWV),对江苏地区2009年夏季一次强对流性天气产生的降水过程进行了综合分析,分析了各时段GPS-PWV的变化特征和水汽的输送特点,并利用WRF中尺度数值模式对此次过程进行了数值模拟。结果表明:GPS-PWV对于空中水汽变化具有很高的敏感性,能及时地反映大气中水汽的时空变化。通过对数值模式结果进行分析后,发现强盛的水汽输入及辐合上升、中高层弱冷空气的侵入活动、低层西南气流加强、对流不稳定层加剧等多种因素的共同作用是造成此次中小尺度对流性降水的主要原因。GPS-PWV提供的精确水汽变化结合数值模式所模拟出的动力热力条件对于强对流性暴雨预报和降水区域判定具有较好的参照意义。
英文摘要:
      In this paper, the GPS-PWV obtained from Jiangsu ground-based GPS water vapor monitoring system was used to comprehensively analyze a severe convective weather process happened in Jiangsu province in summer, 2009, as well as the variation of GPS-PWV at each period and the characteristics of water vapor transportation. Numerical simulation to this process with WRF model shows GPS-PWV has serious sensitivity and timely reflection to the change of the water vapor. Results of numerical simulation analysis on WRF model suggests that the strong convective storm is caused by the interaction of many factors such as strong vapor and convergence ascending motion, weak cold air activities in middle-high levels, the strengthening southwest low-level jet and the weakening stability of convection layer, etc. the combination of these metheod precision variation of water vapor provided by GPS-PWV and the thermal and dynamic condition analoged out by numerical simulation, could forecast the strong convective storm and precipitation areas.
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