渤海海峡大风的对比分析

Comparative Analysis of the Gale over Bohai Straits

[目的]为了解渤海海峡大风的空间分布特征。[方法]统计了烟台、大连沿海共6站1975-2005年共31年的逐日风资料，进行了大风的分区对比分析。[结果]分析表明，海岛站不仅大风日数多，且风力大，能较好地代表渤海海峡大风的情况；渤海海峡大风的主导风向为NW-NNE，大连沿海以北大风为主，烟台沿海春秋季南大风次数明显增多；偏北风和偏南风时风力较大，而偏东风和偏西风时风力较小。南隍城大风增幅大，增速快，大风日数明显偏多，风力偏大。渤海海峡大风增大时间存在明显的时间差。[结论]该研究可为渤海海峡大风预报服务提供重要的参考依据。

[ Objective ] The space distribution characters of the gale over Bohai straits were investigated. [ Method ] Based on the daily meteorological data of 6 stations in the coastal area of Yantai and Dalian from 1975 to 2005, the space contrast distribution characters of the gale were analyzed . [ Result ] The result showed that island stations had more gale days and strong wind power, representing gale situation perfectly over Bohai Straits. The main gale＇s direction over Bohai Straits was NW-NNE. The galeg direction was north in Dalian coastal, and the south gale days increased obviously in Yantai coastal in spring and autumn; north and south gales were stronger than the east and west. Gale in the Nanhuangcheng station was bigger in amplitude, faster in speed increase, more excessive in gale days stronger in wind power. The time when wind power became large was evidently different between both stations. [ Conclusion] This study could provide important reference to the gale forecast and service over Bohai Straits.