Abstract:

Based on the detection data of ST wind profile radar in Huainan from March 2015 to February 2016, the detection capability of ST radar was evaluated in mountainous and hilly area by considering the operation pattern of radar and annual, seasonal and diurnal changes of data availability rate on different heights. The results show that ST wind profile radar could obtain detection data with high spatio-temporal resolution in mountainous and hilly area, the actual data availability rate was 85.6%. The detection capability of ST radar in the boundary layer and middle level of troposphere was higher than that in upper level of troposphere, and the annual average effective detecting height was about 14.0 km, which accounted for 67% of theoretical height. The data availability rate was lower in lower layer of troposphere from May to August and December due to the probable effects of air temperature and humidity. Furthermore, the detection capability affected by atmosphere turbulence presented significant seasonal and diurnal changes, it was higher in summer, then in spring, and lowest in winter, and it was lower at noon and higher before dawn.

Key words: mountainous and hilly area, wind profile radar, data availability rate, detection ability, assessment

摘要：

利用淮南2015年3月至2016年2月ST风廓线雷达探测资料，从雷达运行模式和不同高度数据获取率的年、季、日变化角度，对该型号雷达在山地丘陵地区的探测能力进行评估。结果表明：山地丘陵地区，ST风廓线雷达能够获取高时空分辨率的探测资料，雷达正常工作时间占比为85.6%。雷达的探测能力在边界层和对流层中层明显高于对流层高层，年平均有效探测高度约14.0 km，占雷达最大探测量程的67%。可能受大气湿度、温度影响，探测能力在5—8月和12月对流层低层变低。受大气湍流影响，探测能力综合表现为夏季较高，春季次之，秋、冬季依次降低的季节差异，以及正午较低、凌晨较高的日变化特征。

关键词: 山地丘陵, 风廓线雷达, 数据获取率, 探测能力, 评估