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《Meteorological Monthly》 2012-11
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Homogeneity Study and Comparison Analysis on Precipitation Series over China

WANG Qiuxiang~1 LI Qingxiang~2 ZHOU Haonan~1 WEI Na~3 XING Xuhuang~4 WU Sheng'an~4 1 Xinjiang Meteorological Information Centre,Urumqi 830002 2 National Meteorological Information Centre,Beijing 100081 3 Shaanxi Climate Centre,Xi'an 710015 4 Hainan Climate Centre,Haikou 570203  
Based on the precipitation data during 1951—2009 for all the 2415 stations in China,an SNHT (Standard Normal Homogeneity Test) method is used to test the homogeneity of annual data series.The result shows that about 114 stations contain data discontinuities,which covers about 4.72 percent of the total.In the following step,the inhomogeneous series at the 70 stations where the candidate series have good correlation with the reference stations with correlation coefficients above 0.7,have been adjusted in annual,monthly and daily time scales.Further comparison and analysis show that,the adjustment effects on winter precipitation series are much more than those on summer precipitation series.Finally the raw and adjusted data over plain,mountainous and station-denser or sparser areas have been analyzed,and the result shows that the adjustment is reasonable.The variation coefficients,precipitation anomalies and linear trends have not changed greatly for the most of the adjusted series,with an exception in mountainous areas,the changes are slightly larger.
【Fund】: 国家重点基础研究发展计划(2010CB951600);; 国家科技支撑项目(2012BAC22B00);; 中国气象局气候变化专项项目(CCSF2009-07);; 中国沙漠气象科学研究基金(sqj2005004);; 国家自然科学基金(40475041)共同资助
【CateGory Index】: P468.024
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