青藏高原东南缘九龙地区风廓线雷达与无线电探空资料的对比分析OA

In order to verify the availability of wind profiler radar(WPR)data in in the Jiulong Area on the southeastern margin of the Qinghai-Xizang Plateau,improve the application value of WPR data in plateau area.This study systematically compares horizontal wind profiles from WPR and Southwest Vortex radiosonde obser-vations with four times daily[02:00(Beijing Time,the same as after),08:00,14:00,20:00]of the Jiulong Area from 2015 to 2022.Two temporal matching strategies(single-timepoint and multi-timepoint smoothed data)were employed to assess data consistency.The results reveal:(1)the WPR data acquisition rate exhibits a verti-cally non-monotonic pattern(decline-rise-sharp decrease),with diurnally varying effective detection heights(valid data ratio:0.8),peaking at 20:00 and reaching minimum at 08:00.(2)The WPR and radiosonde data showed strong correlation,which was further improved by temporally averaged WPR data.(3)Vertical stratifica-tion is evident,upper-level WPR-radiosonde correlations strengthen with altitude,whereas lower-level wind components show superior stability.Temporally averaged data significantly improve the quality of u and v compo-nents below 3000 m,but only marginally improve wind direction estimates.(4)The differences in the u,v com-ponents and wind direction between both WPR schemes and the radiosonde data approximately follow a normal distribution.Comparative analysis across different times indicated that the data quality of the u and v components was optimal at 08:00,whereas the largest errors in wind direction occurred at 14:00.(5)The frequency distribu-tions of wind direction and speed from both WPR schemes were generally consistent with those from the radio-sonde.The temporally averaged WPR data showed closer agreement with the radiosonde derived winds.Howev-er,both schemes slightly underestimated the frequency of southeasterly winds compared to the radiosonde,with this discrepancy being most pronounced at 14:00.