山东半岛冬季冷流暴雪的气候特征及其成因征兆  

Climatic characteristics and causality of cold air-outbroken snowstorm events in Shandong Peninsula in winter

作　　者：周淑玲 李宏江 吴增茂[2] 林曲凤 

机构地区：[1]山东省威海市气象局,山东威海264200 [2]中国海洋大学海洋环境学院,山东青岛266003 [3]山东省烟台市气象局,山东烟台264003

出　　处：《自然灾害学报》2011年第3期91-98,共8页Journal of Natural Disasters

基　　金：国家自然科学基金项目(40675068);"黄渤海高影响天气预报中的关键技术研究"(GYHY201106006)共同资助

摘　　要：利用山东半岛降雪资料、海温观测资料和NCEP/NCAR再分析资料,首先用EOF方法,在探讨了山东半岛41年(1965-2005年)冬季冷流降雪气候特征的基础上,重点分析了冷流暴雪的气候特征及时空分布。结果表明:山东半岛冬季冷流暴雪在文登附近有一个强正值中心,在招远附近有一个次强正值中心;降雪量在1980-1995年间呈5年左右的周期振荡,1996-2005年间呈2～3年周期振荡;山东半岛平均每年有0.9个冷流暴雪日。其次,分析了气温和海-气温差与冷流暴雪发生的关系。最后,根据山东半岛冬季冷流暴雪的3种不同的空间分布形态,建立了对应的3种冷流暴雪的500hPa环流模型。Using daily observation of surface snowfall in Shandong Peninsula and NCEP/NCAR daily data during the winter （between November and the next February ） from 1965 to 2005 ,the climatic characteristics and spatiotemporal distribution of the cold air-outbroken snowstorm events in Shandong Peninsula was analysed based on the methods of EOF. The results show that the winter cold air-outbroken snowstorm events in Shandong Peninsula have a strong center near Wendeng and a weak center near Zhaoyuan. The snowfall exhibits quasi-periodic oscillations of 5 years from 1980 to 1995 and 2 -3 years from 1996 to 2005. The yearly average number of cold-air outbroken snowstorm events is 0.9 from 1965 to 2005, The cold air-outbroken snowstorm events have inter-annual and monthly change characteristics. The conceptual model of atmospheric circulation in relation to three distributions of cold air-outbroken snowstorm events was established by composite analysis, which are for events with center near Wendeng, for events along the north of Shandong Peninsula and for events with double centers.

关 键 词：冷流暴雪 特征分析 山东半岛 环流模型 

分 类 号：P458[天文地球—大气科学及气象学]