吴启树,连东英,刘爱鸣,覃丽,沈新勇.湿位涡子项在华南前汛期两类暴雨中的诊断分析.气象科学,,(): WU Qishu,LIAN Dongying,LIU Aiming,QIN Li,SHEN Xinyong.Diagnostic analysis of subitem of MPV on two types of rainstorm in pre-rainy season of South China.Journal of the Meteorological Sciences,,():
湿位涡子项在华南前汛期两类暴雨中的诊断分析
Diagnostic analysis of subitem of MPV on two types of rainstorm in pre-rainy season of South China
投稿时间:2012-05-27  修订日期:2013-09-04
DOI:10.3969/2013jms.0091
中文关键词:  暴雨  湿位涡子项  动态合成  诊断分析
英文关键词:Rainstorm  Subitem of MPV  Dynamic composite  Diagnostic analysis
基金项目:国家重点基础研究发展计划(973计划)项目(2013CB430103,2011CB403405);国家自然科学基金资助项目(41375058,41075039,41175065);江苏高校优势学科建设工程资助项目(PAPD );中国气象局预报员专项(CMAYBY2011-022);福建省气象局开放式气象科学研究基金(2013k04)
作者单位E-mail
吴启树 福州市气象局, 福州 350014 wuqishu942@sohu.com 
连东英 福建省气象台, 福州 350001  
刘爱鸣 福建省气象台, 福州 350001  
覃丽 广西区气象台, 南宁 530022  
沈新勇 南京信息工程大学 气象灾害教育部重点实验室, 南京 210044  
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中文摘要:
      本文从湿位涡的正压项(ζMPV1)和斜压项(ζMPV2)两子项出发,应用常规资料和NCEP再分析资料,通过动态合成分析法,分别分析ζMPV各子项在华南前汛期连续性锋面暴雨和暖区暴雨过程中的特征,并用双雨带过程进行了验证。结果表明:低层ζMPV2的子项(ζ22),对华南锋面降水诊断能力较强,特别是对强降水分布结构特征及中心位置具有明显的诊断能力,不足之处是其强弱并不能直接指示降水的强弱。低层ζMPV1对锋面强降水中心附近的ζMPV1与降水量有一定的反相关性。低层强ζMPV1负值对暖区强降水具有潜势预报能力,但其负中心位置或分布结构不能表征降水中心位置及其分布。ζMPV2及其两子项对暖区暴雨无明显诊断能力。以上所得结论物理意义明确,有助于预报员在实际预报业务中更好地使用湿位涡。
英文摘要:
      Based on the conventional observation data and NCEP reanalysis data, the characteristics of subitem of Moist Potential Vorticity (MPV) are analyzed in a frontal and warm-sector rainstorm event during the pre-rainy season in South China with dynamic composite analysis. The results show that MPV22 at lower level has an obvious diagnostic ability in frontal rainfall, especially in the distribution characteristics and the center location of the rainstorm, except in the precipitation intensity. MPV1 has the inverse correlation with the amplification of precipitation near the rainstorm center. MPV1, with great negative value at lower level, has the potential forecast function in the warm-sector rainstorm, whose distribution structure and negative location of center cant reflect those of rainstorms ever. MPV2 and its subitems have unobvious diagnostic meaning of rainstorms in warm sector. The clear physical meaning of the research conclusion can help the weather forecaster use MPV better.
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