摘要
利用鄂西南2个探空站(恩施、宜昌)L波段雷达的探空秒级资料,分季节分高度分析了鄂西南高空风向风速特征。结果显示:总体而言,鄂西南高空平均风速随高度为先迅速增大后迅速减小,至20.0kgpm后随高度趋于稳定的变化趋势;平均风向随高度则为由NE风以顺时针方向转为偏W风后趋于稳定,之后又转为偏E风的趋势;在距海平面位势高度20.0kgpm以下时,高空平均风速表现为明显的冬季>春秋>夏季;而在20.0kgpm以上时,则夏季明显大于其余三季;在3kgpm以下时四季的最多风向、次多风向表现明显不同,但各季的风向除在近地层偏N风稍多外基本以偏S风为主;在中层四季最多、次多风向基本均为偏W风,而在18.0kgpm以上时,四季最多、次多风向均逐渐转为偏E风。
This paper used the sounding data of the L band radar from the two sounding stations（Enshi and Yichang） in southwest Hubei Province to analyze the characteristics of the wind direction and wind speed there. The results showed that, in general, when the height increasing, the average wind speed in the southwest Hubei increased rapidly and then decreased rapidly until 20.0 kgpm the trend tended to be stable; the average wind direction with height is that when the northeast wind changed to the westly wind in a clockwise direction, it became stable, and later it had a trend to convert to a eastly wind. When the height of the sea level was below 20.0 kgpm, the average wind speed in the upper air was winter spring and autumn summer, while it was above 20.0 kgpm, the speed in summer was much greater than the rest of seasons. When the height was below 3 kgpm, the wind direction are different in four seasons, but the main wind direction of each season was south wind while which was northly wind in the near surface layer; in the middle layer, the most frequent and multiple wind directions were all westly winds, while above 18.0 kgpm, the multiple wind directions gradually turned to eastly winds.
作者
张明
杜裕
廖雪萍
Zhang Ming;Du Yu;Liao Xueping(Yichang Meteorological Bureau, Yichang Hubei 443000;Guangxi Institute for Meteorological Disaster Reduction, Nanning Guangxi 530022)
出处
《气象研究与应用》
2018年第1期85-90,共6页
Journal of Meteorological Research and Application
关键词
高空风
规定层
矢量
四季
high altitude wind
prescribed layer
vector
four seasons.
