浙江多源资料高空风对比分析

使用浙江探空数据对EC再分析数据评估发现两者风场存在较好的相关性,可用EC再分析数据取代探空数据对风廓线数据进行评估。评估结果显示当无降水时,风廓线雷达数据与EC再分析数据相关系数在0.85～0.9之间;当有降水时,两类数据相关系数在0.7～0.8之间。统计结果还显示,无降水时风廓线雷达数据在中层2～4 km与EC再分析数据相对误差较小,在低层和高层由于相关资料的缺测造成相对误差较大。有降水时风廓线雷达数据与EC再分析数据相对误差随高度变化特征不明显。通过对台风个例的风力演变特征分析发现,雷达资料的时空完整性都比较好,相对探空数据可以观察到系统演变过程中更精细的风力结构。

The evaluation and application of radar wind profiler data in zhejiang

Based on a deep comparison between wind profile radar data and air sounding data within 39 months. It is found the correlation of the two data increased based on the improvement of interpolation method about wind profile radar data. TheScorrelation of wind speed seemsSslightly better than inSthe wind direction. Statistical results also show that theSbest correlationSof the two data is at the middle level of 2-4 km, while the poor correlation level is at low-level of 1km and high-level of 5km for the influence of surface friction and instantaneousSobservation error relatively. Moreover, cases analysis also indicated that atmospheric baroclinicity bring about by wind difference between high and low level conducive to strengthen precipitation.