The date of monthly mean maximum and minimum temperature are obtained in 74 stations in Northeast China, after minimizing the posssible effect of urban heat island from 1959-2002. The time series of maximum and minimum temperature for the area are got by averaging the 74 station values for the period. The temperature time series were further analyzed for the change characteristics on year and season in the area. The climate jumps of annual extreme temperature series, by dealing with slippage, were tested by both Mann-Kendall and Yamamoto method during the past 44 years in Northeast.The coefficients of extreme temperature trends were calculated in all stations and all seasons, and the characteristics of terrain distribution of increasing trend were analysed in each season. The results show that asymmetry is detectable in all seasons.Though both maximum and minimum temperature is increasing for the period. Tmin increase more than Tmax in all parts of Northeast China. The former doubles the latter. Their increases are biggest in winter, second in spring, least in autumn.In the center, there is a strong increasing temperature area, bigger and steadier in range.
SUN Feng-Hua, YUAN Jian, GUANG Ying
. Asymmetric Change of Maximum and Minimum Temperature in the Northeast China from 1959-2002[J]. SCIENTIA GEOGRAPHICA SINICA, 2008
, 28(4)
: 532
-536
.
DOI: 10.13249/j.cnki.sgs.2008.04.532
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