阳江地区海陆风特征及其影响  

The Characteristic of Sea-Land Breeze in Yangjiang Area and Its Impact on Precipitation and Temperature

作　　者：周武 黄小丹 黄忠[2] 肖伟军[2] 

机构地区：[1]广东省阳江市气象局,529500 [2]广州中心气象台

出　　处：《气象》2008年第12期44-53,I0004,共11页Meteorological Monthly

基　　金：中国气象局多轨道项目“海岸带海-陆-气相互作用监测及灾害天气预测模式系统”;广东省气象局科研项目(2008C04)共同资助

摘　　要：以阳江地区常规气象站、中尺度观测网的自动气象站和海边的2个80m梯度观测塔资料为依据,对该地区海陆风特征及其影响进行研究,结果表明,阳江地区海陆风西岸早于东岸。在近地层,海陆风随高度升高而增大,5月份前后有时海陆风较浅,不能影响到80m高度。陆风转海风多发生在11:00—12:00之间,海风转陆风发生在23:00前后,都发生在日气压变化的峰值时段。海陆风与山谷风叠加可以达到离海岸线70～75km的内陆地区,但并不能越过云雾山山脉。海陆转换时期,在沿海海湾地区形成辐合区,这个辐合区使其北侧阳江市区附近成为广东4—7月的多雨中心,海风加强向北进到达阳春附近的"喇叭口"地区产生辐合,又使该地成为阳江4—7月另一个多雨地区,这些都是阳江成为广东省暴雨中心的重要因素之一。另外,如果海陆风环流没有受到破坏,阳江沿海地区不会出现高温天气。The characters and effects of sea-land breeze in Yangjiang were studied. The basic data were taken from weather stations, automatic weather stations in Yangjiang and two towers of 80- metre-high gradient observation on the seaside. The result shows that the western coast sea breeze formed earlier than the eastern coast one. In surface layer, the sea-land breeze increases with height. Sometimes in May, the sea-land breeze is too weak to reach the height of 80m. The change from land breeze to sea breeze occurs mostly during 11：00 - 12：00. On the contrary the change from sea breeze to land breeze happens at about 23 ： 00, both during the period of daily peak of pressure fluctuation. The sea-land breeze can reach 70- 75 km far from the coastline when it superimposes valley wind, but it cannot pass over the Mist Hill. During the period of sealand conversion, a convergent zone formed near the bay, which made the urban district of Yangjiang at its northern side to be a rainy center from April to July. The sea breeze conversed in the pipe socket area near Yangchun and made this region become another rainy center. All above are important factors making Yangjiang to be the rainy center of Guangdong. In addition, if the sea-land breeze circulation was not broken down, Yangjiang coastal areas would not have high temperature weather.

关 键 词：海陆风 降水 高温 

分 类 号：P425.41[天文地球—大气科学及气象学] X591[环境科学与工程—环境工程]