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Vaisala RS92/90 探测仪的湿度观测偏差订正初步试验
郝民
(中国气象局数值预报中心)
A Preliminary Test for the Correction of the Humidity Observation Deviation of the Vaisala RS92/90 Detector
haomin
(CMA Numerical Prediction Center)
摘要
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投稿时间:2018-01-18    修订日期:2019-07-31
中文摘要: 探空观测资料无论在天气预报还是数值预报中都是最基本和最重要不可缺少的一类资料源。Vaisala RS92/90探测仪资料又在这类观测中占比很大,其湿度观测资料质量的好坏直接影响同化分析和降水预报,故需要对该资料进行质量评估与偏差订正。文中通过与NCEP和EC再分析的湿度场比较,发现Vaisala RS92/90探测仪的湿度观测偏差,并借鉴Yoneyama对该仪器湿度观测的偏差订正方案,从几种订正方案的比较中优选出对分析改进最为显著,考虑太阳辐射等因素影响的订正方案,并将该方案应用到全球GRAPES-GFS准业务试验中。试验结果表明:Vaisala RS92/90探空湿度观测偏差订正后,同化分析与预报有中性偏正效果。连续试验中预报距平相关订正后东亚与热带有改进,预报评分显示热带、北半球评分略高。故此针对Vaisala RS92/90探空仪湿度观测偏差订正方案在实际业务中有其应用价值。
Abstract:Sounding observation data are the most basic and important data source in weather forecast and numerical weather prediction. Vaisala Radiosonde 92/90 data account for a large proportion of this kind of observation. The quality of the humidity observation data directly affects the assimilation analysis and model forecast, so it is necessary to evaluate the quality of the data and correct the deviation. The humidity observation deviation of RS92/90 detector is found by comparing with the humidity field of NCEP and EC reanalysis. Based on the deviation correction scheme of Yoneyama for the humidity observation of the instrument, the revised scheme which is the most significant for the analysis and improvement and which takes into account the influence of solar radiation and other factors are selected from the comparison of several revised schemes. The scheme is applied to GRAPES-GFS test. The experimental results show that the deviation of humidity observation for the RS92/90 sounding is corrected. Assimilation analysis and prediction have neutral bias effect. After the correction of prediction anomaly correlation in the continuous experiment, there is an improvement in East Asia and tropics, and the forecast score shows tropics. The Northern Hemisphere score is slightly higher, so the correction scheme of humidity observation deviation of RS92/90 sounding instrument has its application value in practical operation.
文章编号:201801180042     中图分类号:    文献标志码:
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
Author NameAffiliationE-mail
haomin CMA Numerical Prediction Center haom2015@126.com 
引用文本:
郝民,0.[en_title][J].Meteor Mon,():-.
haomin,0.A Preliminary Test for the Correction of the Humidity Observation Deviation of the Vaisala RS92/90 Detector[J].Meteor Mon,():-.