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《Journal of China Institute of Water Resources and Hydropower Research》 2014-03
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The study on change points in temperature and precipitation in Liaoning over the past 50 years

HAN Lu;CAO Yang;CHANG Jin;CAO Yong-qiang;School of urban planning and Environmental science,Liaoning Normal University;  
Based on the average annual temperature and precipitation during the period 1959—2008 at 22 meteorological stations,the climate variations and tendencies in Liaoning Province were analyzed by Climate tendency ratio in this study. Then,Mann-Whitney-Pettit method(MWP)and Morlet Wavelet analysis were applied to analyze change points and cyclical in temperature and precipitation. The results show that average annual temperature presents an increasing trend,and has an identified change point in 1988. Additionally,the average temperature after the change point is 12.7% higher than that before,and exists the primary cycle of 7 years. Furthermore,over the past 50 years,the average annual precipitation presents the overall downward trend,but there is no change point found,and its primary cycle is 9 years.
【Fund】: 水沙科学与水利水电工程国家重点实验室2012年对外开放研究基金项目(sklhse-2012-A-02);; 辽宁省高等学校杰出青年学者成长支持计划支持项目(LJQ2012092);; 国家自然科学基金资助项目(51279072)
【CateGory Index】: P468.02
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