摘要
利用多普勒雷达产品对比分析了连云港地区8次典型的强对流天气过程，结果表明：强度达到45～55dBz和56～65dBz的冰雹云回波顶高度比强降水云回波顶高出3．7、2．6km；在降雹前30min左右，垂直累积液态含水量VIL最大值都高于65kg／m^2，而其他对流性天气最大值仅达到48kg／m^2；冰雹天气的西南气流层分布浅薄，对流层中部干燥，形成上干下湿的形势，有利于冰雹强对流天气的形成：强降水天气的VWP显示湿层深厚，对流层中下层大多为西南急流以及东南暖平流，为强降水天气形成提供了充沛的水汽。
Eight typical convective weather processes in Lianyungang were compared and analyzed by using Doppler radar products. The results showed that the tops of echo in hails were taller than in precipitation by 3.7 and 2.6 km when the reflectivity were 45 - 55 dBz and 56 - 65 dBz respectively. The maximum values of VIL were above 65 kg/m2 30 minutes ahead the fall of the hail while the values of other convective weather just reached 48 kg/m2. The shallow distribution of air current layer and the situation of moisture inversion helped the development of the hail. VWP product indicated a thick humidity layer in southwest, the current in the middle and lower troposphere were basically southwest rapids and southeast warm advection, such situation provided plentiful water vapor for heavy precipitation.
出处
《安徽农业科学》
CAS
北大核心
2010年第2期815-819,共5页
Journal of Anhui Agricultural Sciences
基金
公益性行业科研专项(GYHY200806014)
关键词
多普勒雷达
沿海地区
强对流天气
Doppler radar
Coastland
Strong convective weather
