长江三角洲夏季海陆风与热岛环流的相互作用及城市化的影响  

INTERACTION BETWEEN SEA AND LAND BREEZE AND HEAT ISLAND CIRCULATION DURING THE SUMMER OVER THE DELTA REGION OF THE YANGTZE RIVER AND URBANIZATION EFFECT ON CLIMATE

作　　者：苗曼倩[1] 唐有华[1] 

机构地区：[1]南京大学大气科学系

出　　处：《高原气象》1998年第3期280-289,共10页Plateau Meteorology

基　　金：九五攻关项目

摘　　要：用三维中尺度模式研究长江三角洲夏季海陆风与城市热岛环流的相互作用。白天由于东海海风和太湖湖风环流与上海市热岛环流相互增强，最大垂直速度可达６．２ｃｍ／ｓ；夜间则相反。由于海风（包括长江江风）与湖风的对撞，因而在上海到江阴市沿江出现一条水平辐合带。如果上海周围地区随着经济发展，大片农田被城市下垫面所取代，而使绿地覆盖率下降到１５％以下，则夏季夜间地面气温可上升３℃，两个增温中心分别在苏州和嘉兴附近，并且空气比湿下降，气候将出现又干又热的特征。The interaction between sea and land breeze and urban island circulation during the summer over the delta region of the Yangtze River has been studied by means of three-dimensional mesoscale model. In the daytime, the heat island circulation over Shanghai region is strengthened by the sea breeze of the East sea and the lake breeze of Taihu Lake. The maximum vertical velocity is 6.2 cm·s -1 . The case is contrary in the nighttime. The horizontal convergence zone extends from Shanghai toward the Yangtze River in the northwest. It results from the convergence of the sea breeze and the lake breeze. If the region except Shanghai transformed into urbanized underlying surface with economy development, and the coverage rate of green land is lowered to 15%. The surface air temperature over urbanized region are increases widely. It may raise to over 3.0℃ in the nighttime in summer. The centres of height value are at Suzhou and JiaXing and air moisture decreases. The summer climate will be dry and hot.

关 键 词：海陆风 热岛环流 相互作用 城市化 长江三角洲 

分 类 号：P463.3[天文地球—大气科学及气象学] P425.41