J4 ›› 2008, Vol. 26 ›› Issue (3): 48-52.

• 论文 • 上一篇    下一篇

风廓线仪与气球测风资料的对比分析

孙旭映,韩 晖,段海霞,张 良,李忆平,闫敬泽,渠永兴   

  1. 中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,中国气象局干旱气候变化与减灾重点开放实验室,甘肃 兰州 730020
  • 收稿日期:2008-03-10 修回日期:2008-05-13 出版日期:2008-09-30 发布日期:2008-09-30
  • 作者简介:孙旭映(1973-) ,男,甘肃静宁人,硕士,助理研究员,从事大气物理学研究工作. E-mail: sunxuy@tom. com
  • 基金资助:

    干旱气象科学研究基金“风廓线仪在沙尘暴天气观测中的应用研究”( IAM200820)资助

Compara tive Ana lysis on W ind Da ta from Atmospheric Wind Prof iler and Ba lloon Sound ing

SUN Xuying, HAN Hui, DUAN Haixia, ZHANG L iang, L I Yip ing, YAN J ingze, QU Yongxing   

  1. Institute of A rid M eteorology, CMA; Key Laboratory of A rid Clim atic Change and Reducing D isaster of Gansu Province;Key Open Laboratory of A rid Clim atic Change and D isaster Reduction of CMA, Lanzhou 730020, China
  • Received:2008-03-10 Revised:2008-05-13 Online:2008-09-30 Published:2008-09-30

摘要:

利用风廓线仪和气球同步探测风场资料对比,分析了风廓线仪探测风场资料的可靠性。结果表明:在稳定天气过程中,由于风廓线仪的探测盲区和地物杂波的影响,自地面至高空200 m范围内,廓线仪探测的风向、风速与气球探测的风向风速值有一定偏差, 200 m高度以上风廓线仪和气球探空所测得的风场廓线具有很好的相关性;在复杂天气过程中风场廓线形状出现较大偏差,主要原因是由于气球探空资料在各高度层之间的整体连续性方面存在明显不足,而风廓线仪的观测资料无论在各高度层之间还是整体连续性方面都明显好于气球探空。这与在较高海拔地区,气球观测期间的大气局部不稳定有关。由于气球在经过某高度层时的取值明显受到当时大气层局部小湍流活动或者较强的下沉或上升气流影响,使气球经过该点时的位移与其相邻两点之间出现明显的飘逸,从而造成气球在某个高度范围内的风资料观测值出现较大偏离。但由于探空气球的资料不连续,无法准确判断气流扰动情况,而风廓线仪获取的不同高度上的风资料是10 min 内的平均观测值,一般不受小范围的空气扰动而出现较大偏离,另外,风廓线仪的观测是连续的,每组观测值之间只存在10 min的时间差,通过对前后几组数据的对比分析,可以明显看出当时气流的扰动情况。因此,风廓线仪探测在资料的连续性和分析气流扰动情况,尤其是大尺度湍流活动方面更有探空气球不可替代的作用,风廓线仪观测资料的可靠性具有良好的应用价值。

关键词: 风廓线仪, 工作原理, 对比分析

Abstract:

Firstly,the working p rincip le and measurement p recision of the Airda - 3000Q type atmospheric wind p rofiler (AWP) were introduced. Then, a contradistinctive analysis on the wind p rofile data acquired by both AWP and synchronous balloon sounding was conducted to estimate the reliability ofAWP for detectingwind field. The results show that under the stable weather condition, the p rofiler’s detection ofwind direction and wind speed had some deviation compared by the balloon’s detection from the ground to 200 m height due to the detecting blind spots of the AWP and the ground clutter, but above 200 m, both wind field p rofiles correlated well;Under the comp lex weather condition, theirwind p rofiles had obvious deviation because the wind information on the different height acquired by AWP is a temporal average of wind field in a time period, but the wind data measured by sounding balloon on a specific height is the instantaneous value while balloon passed by.

Key words: atmospheric wind p rofiler, working p rincip le, contradistinctive analysis

中图分类号: