摘要
利用NCEP再分析数据和探空数据,使用MM5中尺度数值模式模拟分析了发生在中国东南沿海的一次大气波导过程与温度、湿度和位涡等气象物理量场的相关性。数值模拟分析表明:此次悬空波导的发生是西风槽等系统携带的冷空气与北上台风共同作用引起的,同时位涡场极大值区域(极大值一般大于2PVU)与大气波导出现的区域相对应,分析位涡场变化可作为大气波导机理和预报研究的途径之一。
The relations between the atmospheric duct which arise in the Southeast China sea and the meteorological fields quantities like air temperature, humidity and potential vorticity are simulated by mesoscale numerical model MMS, base on repeated NCEP analysis data and sounding data. Computer simulation results show that the occurrence of the duct is caused by westerly trough and northward typhoon, in addition, maximum value （greater than 2 PVU, generally） region of potential vorticity is corresponding to duct region, which is one of important research approaches for duct forecasting and mechanism.
出处
《电波科学学报》
EI
CSCD
北大核心
2009年第4期742-747,共6页
Chinese Journal of Radio Science
关键词
大气波导
西风槽
台风
MM5模式
atmospheric duct
westerly trough
typhoon
MM5 model
