ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 38 Issue 11 > 2012,38(11):1390-1398. DOI:10.7519/j.issn.1000-0526.2012.11.008 Prev Next
Homogeneity Study and Comparison Analysis on Precipitation Series over China
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Abstract:
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.
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