1965—2015年大连市旅顺口区大风气候特征分析

Climatic Characteristics of Gale of Lvshunkou District in Dalian City During 1965-2015

利用1965—2015年旅顺口区本站气象观测站大风资料,得出旅顺口区8级以上大风的分布规律。结果表明:旅顺口区冬夏季风交替显著,大风的季风特征明显,冬季大风多为冷空气大风,春季初夏的大风主要由低压和倒槽引起,夏季的大风主要受热带气旋和副热带高压北上引起。受三面环海影响,旅顺口区大风日数远远高于内陆地区。从近50年大风日数分布规律来看,旅顺口地区大风日数总体呈线性递减趋势。春季和夏季以东南、南东南风向为主,秋季和冬季以北风、北东北风向为主。

Using the gale data of Lvshunkou District Meteorological Observation Station during 1965-2015,the distribution regulation of the gale above 8 level in Lvshunkou District was concluded. The results showed that the winter and summer monsoons in Lvshunkou District alternated obviously,the feature of monsoon wind was obvious. The winter gale was mostly cold wind ,gales in spring and early summer were mainly caused by low pressure trough, and the gale in summer was mainly affected by tropical cyclones and subtropical northwards. Affected by the sea on three sides ,windy days in Lvshunkou District were much more than that of inland areas. Based on the distribution regulation during past 50 years,the gale days in Lvshunkou Distict showed a linear decreasing trend. In spring and summer, the wind directions were mostly SE and SSE, and that in autumn and winter were mostly N and NNE.