湿位涡物质的保守性原理及其应用  

Impermeability of Moist Potential Vorticity Substance and its Application

作　　者：周玉淑[1] 邓国 雷霆[1] 

机构地区：[1]中国科学院大气物理研究所,北京100029 [2]国家气象中心,北京100081

出　　处：《中国科学院研究生院学报》2006年第5期692-700,共9页Journal of the Graduate School of the Chinese Academy of Sciences

基　　金：中国科学院海外杰出学者基金项目(2005-2-16);国家自然科学基金项目(40405007;40505009);国家重点基础研究发展规划项目(2004CB418302);中国科学院重要方向项目(KZCX3-SW-225)资助

摘　　要：论证了湿位涡物质的保守性，阐明强降水会造成湿位涡物质异常，异常高度主要出现在850～500hPa．用NCEP／NCAR1°×1°的分析资料，对1999年6月下旬引起长江流域暴雨的对流系统进行了湿位涡物质的诊断分析，结果表明梅雨期间大气的湿位涡物质异常区域与降水带的位置和走向基本对应，主要位于梅雨锋及其南侧，与等θe线的走向保持一致．依据湿位涡物质的保守性原理，等压面上等θe线间的湿位涡物质异常区的移动示踪了暴雨区的移动，这可为暴雨预报提供一定的动力依据．Based on the moist potential vorticity （MPV impermeability theorem of the MPV substance （MPVS） ） equation containing both heat and mass forcing, the is proved. It is clarified that mass forcing induced by intensive precipitation can lead to the MPVS anomaly. The MPVS anomaly is mainly located between 850 - 500 hPa. With NCEP/NCAR 1°× 1° data in Meiyu period in 1999, we find that the MPVS anomaly region corresponds well with the rain belt （include the location and movement of the rainbeh）. Namely, the MPVS anomaly region is mainly located on the southern side of the Meiyu front, and keeps the same orientation with iso-θe. According to the impermeability theorem of the MPVS, the movement of the MPVS anomaly region on the isobaric can indicate the movement of heavy rain region, which may provide a possible clue for forecasting the orientation of the rainbeh.

关 键 词：湿位涡物质 保守性 暴雨预报 

分 类 号：P4[天文地球—大气科学及气象学]