NUMERICAL SIMULATIONS AND DOPPLER RADAR DATA ANALYSIS OF A HAIL PROCESS IN HUAIHE RIVER BASIN

• 作 者: 李柏 许小峰 周昆
• 机 构: Nanjing Institute of Meteorology Nanjing 210044,China Meteorological Administration,Beijing 100081,M
• 出 处: Acta Meteorologica Sinica
• 发表日期: 2002年03期
• 关键词: CINRAD RADAR cyclone troposphere CAPE convective storm mesoscale hasbeen disaste

A hail process in Huaihe River Basin observed by CINRAD Doppler radar on 12May 2000 hasbeen simulated by using nonhydrostatic mesoscale numerical model MM5.The simulated wind fieldis analyzed and compared with Doppler radar wind data,both of them show that there was ameso-β cyclone around the hail region.Results show that this meso-β cyclone existed below 3 kmin the troposphere and its cyclonic circulation was very obvious below 1 km.The temperature andmoisture fields from the simulation are also analyzed.Furthermore,the storm-relativeenvironmental helicity and CAPE(convective available potential energy)are discussed.

A hail process in Huaihe River Basin observed by CINRAD Doppler radar on 12 May 2000 hasbeen simulated by using nonhydrostatic mesoscale numerical model MM5. The simulated wind field is analyzed and compared with Doppler radar wind data, both of them show that there was ameso-beta cyclone around the hail region. Results show that this meso-beta cyclone became below 3 kmin the troposphere and its cyclonic circulation was very obvious below 1 km. the temperature andmoisture fields from the simulation are also analyzed. Future, the storm-relative environmental helicity and CAPE ( convective available potential energy are discussed.