摘要
利用常规资料、中尺度模式(MM5)模拟结果和自动站资料分析了2003年10月11日渤海湾风暴潮的天气系统及风场结构特征。分析表明,强冷空气从偏东路径南下与强盛的暖湿急流及地面倒槽的共同作用,形成持续强东北大风是引发渤海风暴潮的主要强迫动力,风应力海水向岸输送(增水)范围约100km,持续时间10～12h,风应力增水作用与天文大潮相叠加直接导致风暴潮的发生。1985年以来渤海湾成灾风暴潮发生的几率明显增加。
Based on the observational data from conventional and automatic weather stations and numerical forecast products of the mesoscale model MM5, the synoptic system and wind field structure of a storm surge in the Bohai Sea on 11 October 2003 were analyzed. The results show that the main causes of the storm surge are the strong northeast wind engendered by strong cold air from northeast and warm air from southwest and inversion; the inshore transport of seawater lasted 10-12 hours over an area of 100 km, directly resulted from the inshore wind and astronomical tides concurrently. It is also found that the occurrence frequency of storm surges has increased obviously since 1985.
出处
《气象科技》
2005年第3期235-239,共5页
Meteorological Science and Technology
