摘要
为了对比宁波地区夏季强对流短时暴雨和台风短时暴雨的多普勒雷达回波特征,选取2004年和2005年该地区夏季出现的强对流短时暴雨和台风短时暴雨的个例作为研究对象,从回波的发展演变、回波形态及回波产品值等进行分析比较,发现:这两类短时暴雨在回波强度、回波高度及垂直液态水含量等产品有明显差异,而降水产品如OHP,STP估计的雨量值,在这两种天气过程中,均比实况雨量资料偏小,且实况雨量越大,偏差也越大;另外,在分析中也发现,用雷达缺省的Z-I关系来估计雨量有很大误差,特别是在台风降水过程中;最后分别建立了对流性降水与台风降水的Z-I关系,以修正宁波夏季的降水估计值。
In order to find the echo characteristics of convective short-time torrential rainfall and typhoon short-time torrential rainfall, the two types of Doppler weather radar data in NingBo during summers in 2004 and 2005 are analyzed based on these echoes＇ evolution, intensity, products and so on. The results indicate that they have significant differences in characteristics of products, such as Z, TOP and VIL etc. The estimated precipitation from those products, such as OHP and STP were lower than the reals, and the bigger the precipitation, the bigger errors there are; there were also big errors while using the relationship between Z and I to estimate precipitation, especially in the cases of typhoon. Finally, in order to improve the precipitation estimate in summer in Ningbo, the relationships between Z and I under convective and typhoon weather cases are established respectively.
出处
《气象》
CSCD
北大核心
2006年第11期67-72,I0002,共7页
Meteorological Monthly
关键词
强对流短时暴雨
台风短时暴雨
回波特征
Z-I关系
convective short-time torrential rainfall typhoon short-time torrential rainfall echo characteristics relationship between Z and I
