气象2016，Vol.42Issue(6)：743-755,13.DOI:10.7519/j.issn.1000-0526.2016.06.010
中国区域高空三种气温、湿度资料交叉对比
Cross Comparison of Three Kinds of Upper Air Temperature and H umidity Data over China
摘要
Abstract
In this study,the differences of temperature and humidity profiles over China obtained from L band sounding system,COSMIC occulation observation system and ERA-Interim reanalysis data during the period 2011-2013 are compared.Time series comparisons show a good positive linear correlation among these three data sets.In addition to a few levels above 10 hPa,L band,COSMIC occultation and ERA-Interim reanalysis temperature data accord well with each other,with the temperature bias ranging within ±0 .4℃,and the standard deviation between 1℃ and 2℃.L band temperature is higher due to the great influence by solar radiation in the middle to upper troposphere,with the maximum bias of 0.64℃when compared with COSMIC occultation.As for relative humidity,things are strikingly different.L band relative humidity data exhibit a varying degree of dry bias between the lower troposphere and the up-per troposphere.Moreover,there are obvious diurnal,seasonal and climate regional differences,and the differences become even more evident during daytime,spring/summer period,and over south moisture cli-mate areas.Generally,the dry bias is more obvious in the region near the top of troposphere;L band rela- <br> tive humidity turns to wet bias at above 200 hPa atmospheric pressure layer.L band and COSMIC occulta-tion sounding relative humidity,ERA-Interim relative humidity have positive correlations obviously below the top of troposphere.Nevertheless,there is a negative correlation above the tropopause.关键词
L波段探空/COSMIC/ERA-Interim/气温/相对湿度Key words
L band sounding/COSMIC/ERA-Interim/temperature/relative humidity分类
天文与地球科学引用本文复制引用
余君,李庆祥,廖捷,牟容,李奇临..中国区域高空三种气温、湿度资料交叉对比[J].气象,2016,42(6):743-755,13.基金项目
国家科技支撑项目（2012BAC22B05）和公益性行业（气象）科研专项（GYHY201206028）共同资助 （）
