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L波段探空可降水量观测偏差分析及订正算法研究
胡姮, 曹云昌, 梁宏
(中国气象局气象探测中心)
Systematic Errors and Their Calibrations For Precipitable Water Vapor of L-band Radiosonde
Hu Heng, Caoyunchang, LiangHong
(CMA Meteorological Observation Centre)
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投稿时间:2018-01-18    修订日期:2018-12-25
中文摘要: 为了探讨探空观测的水汽可降水量资料的可靠性,本文以GNSS/MET遥感的大气可降水量为参照标准,对广东汕头地区2013年以及西藏那曲站2016年6月至2017年5月的两种可降水量观测结果进行对比分析和偏差订正。经过研究分析表明:两个站探空可降水量相比地基GNSS可降水量偏干,偏差分别为7.4%和9.8%。探空可降水量的偏差显示具有季节变化和日变化的特征,其中夏季偏差较明显,00时(UTC)比12时(UTC)明显。太阳辐射加热引起的地面气温的日变化和季节变化是造成偏差的重要原因。本文根据太阳辐射偏差订正经验公式,对两个站的探空可降水量进行偏差订正,订正后偏差明显减少。
Abstract:In order to investigate the reliability of total atmospheric water vapor data from L-band radiosonde observations(RS PW), the atmospheric water vapor of GNSS / MET remote sensing(GNSS PW) is taken as the reference standard in this paper to comparative analysed and corrected the observed RS PW in 2013 in Shantou and from June 2016 to May 2017 in Naqu. Research and analysis shows that: RS PW in this stations are obviously smaller than GNSS PW, the deviation were 7.4% and 9.8% . The deviation has obvious seasonal and diurnal variation characteristics, and in summer is most obvious, at 00UTC is more obvious than at 12UTC. Solar radiation heating and air temperature changes in the daily and seasonal variation is an important reason for the deviation. According to Solar radiation bias correction formula, the L bias correction algorithm is proposed. the deviation is reduced obviously.
文章编号:201801180038     中图分类号:    文献标志码:
基金项目:《探空湿度廓线订正算法研究》 MOCQNJJ201404
引用文本:
胡姮,曹云昌,梁宏,0.[en_title][J].Meteor Mon,():-.
Hu Heng,Caoyunchang,LiangHong,0.Systematic Errors and Their Calibrations For Precipitable Water Vapor of L-band Radiosonde[J].Meteor Mon,():-.