风廓线雷达在高空风场分析中的应用

利用大连风廓线雷达高时空分辨率风场观测资料,统计2011年雷达站上空各层水平及垂直风速的分布特征.通过分析发现:最大水平风速通常出现在12 km上下,受高空急流的影响,各季节高空最大水平风速出现高度不同,4 km以下高空水平风速随高度的变化各月份存在一定差异,4 km以上至最大风速层,水平风速随高度的升高而增大,最大风速层以上至雷达测量的上限水平风速随高度增加先减小后增大；高空垂直风速在夏季较为明显,秋季次之,冬春季节最小；6月是全年月均垂直风速最大的月份,在500～1300 m高度层存在一个上升气流中心,平均风速大于0.6 m/s,2月各高度平均垂直风速全年最小.

The application of wind profiling radar in upper wind analysis

The characteristics of each layer of wind and vertical flow were analyzed using products of dalian wind profile radar observation data, Through the analysis, it had been found that the layer of maximum horizontal wind speed was usually at 12km,there was a significant change of wind speed with height difference below 4km in a year, wind speed increased with height increased from 4km to layer of maximum wind speed, the horizontal wind speed first decreased and then increased with height increasing from 12km to radar measurement-supper. The averaget vertical wind was the biggest in summer and the smallest in winter and spring. The monthly vertical wind speed was the biggest in June. There was an updraft center in 500-1300m level, the average vertical wind speed was greater than 0.6m/s,and the monthly vertical wind speed was the minimum in February.