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非均匀饱和广义湿位涡在暴雨分析与预测中的应用

周玉淑 曹洁 王东海

周玉淑, 曹洁, 王东海. 非均匀饱和广义湿位涡在暴雨分析与预测中的应用. 应用气象学报, 2007, 18(6): 754-759.
引用本文: 周玉淑, 曹洁, 王东海. 非均匀饱和广义湿位涡在暴雨分析与预测中的应用. 应用气象学报, 2007, 18(6): 754-759.
Zhou Yushu, Cao Jie, Wang Donghai. Application of generalized moist potential vorticity in non-uniformly saturated atmosphere to torrential rain forecast. J Appl Meteor Sci, 2007, 18(6): 754-759.
Citation: Zhou Yushu, Cao Jie, Wang Donghai. Application of generalized moist potential vorticity in non-uniformly saturated atmosphere to torrential rain forecast. J Appl Meteor Sci, 2007, 18(6): 754-759.

非均匀饱和广义湿位涡在暴雨分析与预测中的应用

资助项目: 

国家自然科学基金项目 40405007

中国科学院项目 KZCX2-YW-206-4

中国气象科学研究院灾害天气国家重点实验室开放课题 2006LASW05

中国科学院项目 KZCX2-SW-225

Application of Generalized Moist Potential Vorticity in Non-uniformly Saturated Atmosphere to Torrential Rain Forecast

  • 摘要: 考虑实际大气非均匀饱和特性, 通过引入广义位温及广义湿位涡方程, 对华北暴雨和江淮梅雨锋暴雨的发生及落区进行了广义湿位涡异常的诊断分析, 表明暴雨形成时大气低层有广义湿位涡的异常出现。对广义湿位涡倾向的计算表明:它对暴雨的发生有一定指示作用, 因而可利用广义湿位涡的异常来识别暴雨的出现。
  • 图  1  2001年7月27日06:00地面6 h降水实况 (单位:mm)(a) 与850 hPa广义湿位涡 (单位:PVU; 阴影区是广义湿位涡值≥1.5 PVU的区域, 1 PVU=10 -6K·m3·kg -1·s -1)(b)

    Fig. 1  Horizontal distribution of 6-hour precipitation from observation (unit:mm)(a), generalized moist potential vorticity at 850 hPa (unit:PVU; the shade area represents the generalized moist potential vorticity value≥1.5 PVU)(b) at 06:00 on July 27, 2001

    图  2  2003年7月9日00:00地面6 h降水实况 (单位:mm)(a) 与925 hPa广义湿位涡 (单位:PVU; 阴影区是广义湿位涡值≥1.5 PVU的区域)(b)

    Fig. 2  Horizontal distribution of 6-hour precipitation from observation (unit:mm)(a), generalized moist potential vorticity at 925 hPa (unit:PVU, the shade area represents the generalized moist potential vorticity value≥1.5 PVU)(b) at 00:00 on July 9, 2003

    图  3  2001年7月27日06:00沿暴雨中心的广义湿位涡沿115°E垂直剖面 (a) 和沿37°N垂直剖面 (b)(单位:PVU)

    Fig. 3  Meridional distribution along 115°E (a) and zonal distribution along 37°N (b) of generalized moist potential vorticity at 06:00 on July 27, 2001(unit:PVU)

    图  4  暴雨中心点不同高度处广义湿位涡倾向的时间演变 (单位:10 -8 PVU·s -1)(a)37°N, 115°E处2001年7月26日06:00—27日18:00, (b)33°N, 119°E处2003年7月7日18:00—9日06:00

    Fig. 4  The generalized moist potential vorticity tendency evolution of the torrential rain center at 37°N, 115°E from 06:00 on July 26 to 18:00 on July 27, 2001 (a) and at 33°N, 119°E from 18:00 on July 7 to 06:00 on July 9, 2003 (b)(unit:PVU·s -1)

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出版历程
  • 收稿日期:  2007-03-30
  • 修回日期:  2007-07-11
  • 刊出日期:  2007-12-31

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