Precipitation Trend and Mutation Analysis of Shangqiu From 1954 to 2010
Abstract：Using linear regression,Mann-Kendall and other methods,the article gets the results of trend analysis and mutation testing on annual and seasonal precipitation in Shangqiu from December 1953 to November 2010.The results indicate that the trend of annual and seasonal precipitation is not significant,in summer and winter,the precipitation shows an increasing trend,and decreasing in spring and autumn.Mutations in the annual precipitation occur in 2003.In the spring,summer,autumn and winter,the mutation occurred respectively in 1992,2003,1988 and 1997.The days of daily precipitation≥0.01 mm is significantly decreasing at 5.41 d/10a,the rainy days mutates at 1975.The increasing trend of daily precipitation ≥25.0 mm and 50.0 mm is not significant.Annual average daily precipitation increases significantly at 0.56 mm/10a,and the mutation occurs in 1974.
Keywords：precipitationprecipitation daysprecipitation intensitychange trendmutation
Publication Date：2011-05-27
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：7( 67-73 )