摘要:为进一步加深南北气候过渡带上山地丘陵地区的风场认识，利用淮南2015年3月至2016年2月ST（Stratosphere-Troposphere）风廓线雷达的探测资料，分析了该地区20 km高度内风场的变化特征及垂直结构。结果表明：淮河流域850 hPa、700 hPa、500 hPa、100 hPa等压面高度上，风场有明显的垂直变化，风速及其波动幅度随春、夏、秋、冬先减小后增大，且随高度增加，夏季最小、冬季最大的季节规律逐渐增强；风场的垂直分布存在差异，在中低层以下，以小于10 m/s的风为主，风向转换多，中低层以上10～25 m/s的偏西风居多；年平均风场结构为低层以5 m/s北风为主，到2 km左右向西偏转，风速小于10 m/s，在5 km高度处形成15 m/s的西风，且风速持续增大，10 km左右达到25 m/s后逐渐减小，到15 km左右风向顺时针向北偏转，直到20 km附近与低空风场相近。
关键词:淮河流域/
风廓线雷达/
风场垂直结构/
特征分析
Abstract:To further understand wind fields in mountains and hilly areas in the north-south climate transition zone, based on the March 2015 to February 2016 observational data of ST (stratosphere-troposphere) wind profiler radar, the variation characteristics, and vertical structure of 20-km high wind fields in Huainan were analyzed. The results show the following: In Huaihe River valley, the wind field exhibited significant vertical changes at 850 hPa, 700 hPa, 500 hPa, and 100 hPa; through the seasons, the wind speed and its amplitude first decreased and then increased; they were minimum in summer, followed by in autumn, and maximum in winter, whereby the seasonal variation amplified with increasing height. The vertical distribution of the wind field displayed a great difference; the speed was mainly less than 10 m/s, and the wind directions below the middle and lower levels shifted; western winds of 10-25 m/s dominated the region above these levels. As observed from the annual wind vertical structure, in the lower level, mainly about 5 m/s southern wind turned to the west with less than 10 m/s at 2 km height; 15 m/s western wind was developed at 5 km height; its speed continued to increase and reached 25 m/s at 10 km height; when turning north from 15 km height , it gradually decreases to a level closer to that of the lower wind field until about 20 km.
Key words:Huaihe River valley/
wind profile radar/
vertical structure of wind field/
characteristic analysis
PDF全文下载地址:
http://www.iapjournals.ac.cn/qhhj/article/exportPdf?id=18010
