摘要
利用1967—2016年东乡县地面气象观测站大风频次资料进行统计分析。结果表明,近50年来东乡县平均风速为2.5 m/s。春季平均风速最大,夏季次之,冬季最小。年平均最大风速为15.5 m/s,大风日数呈波动式下降趋势,20世纪60—80年代为大风高发期,而20世纪90年代及21世纪初年大风日数处于波动期,2005年大风日数为历史最低值。大风日数的月变化曲线呈典型抛物线型。大风天气主要集中在夏季,春季次之,冬季最少。
The wind characteristics were analyzed based on the meteorological data of Dongxiang County from 1967 to 2016. The results showed that mean annual wind speed was 2.5 m/s in the past 50 years. The largest mean wind speed appeared in spring ,followed by summer,and the smallest was in winter. The maximum of mean annual wind speed was 15.5 m/s.The windy clays showed a fluctuating decrease trend. The windy clays occurred frequently from 1960s to 1980s,and fluctuated during 1990s to 2000s. The minimum of windy days appeared in 2005. The monthly change curve of windy days was typical parabolic shape. The windy days were concentrated in the summer, followed by spring, and the least in winter.
出处
《现代农业科技》
2017年第20期185-186,共2页
Modern Agricultural Science and Technology
