3种方法对中国探空温度资料均一性检验对比分析  

Comparative analysis of three methods detecting inhomogeneity of radiosonde temperature data in China

作　　者：陈哲[1] 杨旭[2] 刘靓珂 侯文杰 

机构地区：[1]国家气象信息中心,北京100081 [2]辽宁省人工影响天气办公室,辽宁沈阳110166 [3]南京信息工程大学,江苏南京210044 [4]辽阳市气象局,辽宁辽阳111000

出　　处：《气象与环境学报》2014年第6期141-146,共6页Journal of Meteorology and Environment

基　　金：国家重点基础研究发展计划项目(2010CB951602);国家科技支撑计划课题(2012BAC22B00);公益性行业(气象)科研专项(GYHY201406016)共同资助

摘　　要：利用美国国家气候数据研究中心开发的Pairwise均一性检验订正方法、加拿大环境研究中心开发的PMFT方法和PMT方法,结合20世纪再分析资料和详细的元数据信息对1951—2008年中国123个探空台站的温度资料进行均一性检验和订正。结果表明:3种方法对中国探空温度资料订正幅度和订正前后的趋势变化存在差异。产生差异的主要原因,一方面由于Pairwise方法设计的问题,导致对中国大部分台站同时改变辐射误差订正方法和系统升级造成的断点检测能力较弱;另一方面由于PMFT方法未使用参考序列,不能去除气候变化本身的变化趋势,导致PMFT方法在断点判断上存在漏判的现象。而PMT方法结合20世纪再分析资料的客观判断方法较适合中国探空资料的均一性检验和订正,其订正结果表明,利用该方法得到的中国探空温度数据的统计学特征在低层小于全球尺度探空温度的订正结果,而在高层基本和全球探空数据的订正尺度相当。两个间断点和0.0—0.2℃的订正量所占的比例最大。从中国范围来看,对流层为增温趋势,这种增温趋势随高度的增加逐渐减弱,至对流层顶100 h Pa转为弱的降温趋势。Combining reanalysis data as a reference series and the detailed metadata of each radiosonde station in China,homogeneity test and corrections were carried out for monthly temperature data at mandatory levels at 123 radiosonde stations from 195 1 to 2008 in China using a Pairwise method developed by America National Climatic Data Center,PMFT and PMT methods developed by the Environment Center of Canada.The results show that ad-justed values of radiosonde temperature data in China and its trends before and after correction have some differ-ences for three different methods.One of the main reasons is that design of the Pairwise method leads to the weak capability for break points detection if majority regional stations of China change their radiation correction method and update the system simultaneously.Another reason is that the PMFT method cannot remove the climate temper-ature trend because of no reference series,so some break points cannot be detected.The PMT method combines with reanalysis data,which is more suitable for homogeneity test and correction of radiosonde temperature data in China.The adjusted results show that the statistical characteristics of radiosonde temperature are greater than those of the global scale at the low level,and both are consistent at the high level.Two break points and adjusted values between -0.2 ℃to 0.0 ℃have a larger proportion in datasets.After adjustment,the troposphere temperature av-erage over China is warming trend.This warming trend weakens gradually with increase of heights and becomes a weak cooling trend till 100 hPa.

关 键 词：探空温度资料 均一性检验 PMFT方法 Pairwise方法 PMT方法 

分 类 号：P413[天文地球—大气科学及气象学]