气象学报Issue(4)：794-804,11.DOI:10.11676/qxxb2014.046
1979-2012年中国探空温度资料中非均一性问题的检验与分析
Homogenization and analysis of China radiosonde temperature data from 1979 to 2012
摘要
Abstract
Using the PMTred (penalized maximum t test)method developed by the Environment Canada with the ERA-interim reanalysis data as the reference series and first using the detailed metadata of each radiosonde station in China as the judging ba-sis,the inhomogeneity test and corrections are carried out on the monthly temperature data at mandatory levels at the 125 ra-diosonde stations in China.And combining with the detailed metadata,the main reasons causing the homogenization problem of the radiosonde temperature data in China have been analysed.The result shows that there are break points due to human factors in the radiosonde temperature data of China.With the height increasing,a general trend is presented,that is,both the number of the inhomogeneous stations and break points show less in lower levels and more in high levels.Also,the mean magnitude of correction increases with height and the negative correction values have the high proportion in the whole dataset,implying that the radiosonde temperature data in China is systematically higher.After adjustment,the temperature trend on 200 hPa level be-comes close to zero.The cooling trend on 100 hPa level weakens after adjustment,but the warming trend strengthens on 300-700 hPa.The update of the sounding systems in 2000 and 2001 including the radiation correction method is the main reason of the inhomogeneity in Chinese radiosonde temperature data.Another reason is the shifts of the radiosonde instrument.This two consecutive metadata changes caused the following monthly mean temperature data appears systematically lower.This is also the main reason why there are some differences in the temperature trend between before and after adjustment.关键词
探空资料/温度/非均一性检验/资料订正Key words
Radiosonde data/Temperature/Inhomogeneity test/Data adjustment分类
天文与地球科学引用本文复制引用
陈哲,杨溯..1979-2012年中国探空温度资料中非均一性问题的检验与分析[J].气象学报,2014,(4):794-804,11.基金项目
资助课题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）、中国气象局气候变化专项（CCSF201330）。 （）
