青岛地区8月一次海风环流实例分析和WRF模拟

An Analysis and WRF Simulation of a Case of Sea-Breeze Circulation in August at Qingdao

根据青岛地区2006年8月份浮标站、岸基站和陆地站观测资料及探空加密测风资料,分析了8月21日到22日一次典型的海、陆风环流过程,并进行了WRF数值模拟和检验分析。观测数据分析表明:海、陆风环流在垂直方向分别具有闭合环流,海风环流发展高度远高于陆风环流,海风环流午后发展最强盛,海风在底层最先发展并在底层最先消失,风速大小随高度减小,发生海风环流时青岛站与浮标站的海陆气温差在4℃以上,海风环流向内陆推进大约40多千米;WRF模式较好地模拟了海风环流发生发展的完整过程,并揭示了海风环流与半岛北部相向风场的相互作用,在半岛中部地区存在辐合上升区。

Based on the observational data in August 2006 obtained by buoys, automatic weather stations and radio sounding in Qingdao Region, a typical land-sea breeze case is studied in detail, and verified by WRF modeling results. The results indicate that both sea breeze circulation and land breeze circulation in the vertical direction are closed, and the thickness of sea-breeze circula- tion is much thicker than land breeze circulation. Sea-breeze appears and disappears firstly in the lower level, which is strongest in the afternoon. The wind force decreases with height. When the land-sea temperature difference between Qingdao Station and buoy station reaches to 4℃, sea breeze occurs, which can extend to captures the sea breeze circulation, the peninsula, which results in the inland about more than 40km. The WRF model successfully and reveals the interaction convergence and ascending between sea breezes on both sides of in the middle part of the peninsula.