一次渤海气旋引发的大风成因分析

[目的]分析一次渤海气旋引发的大风成因。[方法]选取烟台浮标站和纪姆岛自动站作为实况参照资料,对2010年4月26～27日发生在烟台的大风天气过程进行分析。[结果]此次大风天气是由于高空强冷空气入侵,促使地面低压快速发展加深为渤海气旋造成的,而高空风动量下传作用使地面风速加大。天气在线和烟台Grapes模式在此次大风预报过程中,对大风的量级、风向以及影响系统预报基本准确,尤其是对10m风场预报具有很高的参考价值。[结论]该研究为今后此类大风的预报提供了参考依据。

Analysis on Formation Reason of a Gale Induced by Bohai Sea Cyclone

[Objective] The research aimed to analyze formation reason of a gale induced by Bohai Sea cyclone.[Method] Yantai buoy station and Jimu Island automatic station were selected as reference of the actual situation.Gale weather process which occurred in Yantai during 26-27 April,2010 was analyzed.[Result] This gale weather was caused by Bohai Sea cyclone.Upper strong cold air invaded,which promoted ground low pressure quickly developing into Bohai Sea cyclone.Momentum download effect of the upper wind made ground wind speed increase.In forecast process of the gale,weather online and Grapes model both had basic accurate forecasts to magnitude,direction and influence system of the gale,especially to the wind field at 10 m.[Conclusion] This research provided reference basis for forecast of this kind of gale in future.