| The division of precipitation change and its regional characteristics in China during 1961—2010 |
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| DOI：10.7606/j.issn.1000-7601.2017.06.41 |
| Key Words: precipitation anomaly percentage rotated empirical orthogonal function the division of precipitation changes linear trend analysis 5-years moving average analysis |
| Author Name | Affiliation | | WANG Song | Jilin Province Meteorological Service Center, Changchun, Jilin 130062, China | | GAO Xi-ning | College of Agronomy, Shenyang Agricultural University, Shenyang, Liaoning 110866, China | | XIAO Yao | Henan Province Meteorological Service Center, Zhengzhou, Henan 450003, China | | WANG Qi | Jilin Meteorological Observatory, Jilin 130062, China | | WANG Ning | Jilin Province Meteorological Service Center, Changchun, Jilin 130062, China |
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| Abstract: |
| In order to study the division of precipitation change and its regional characteristics in recent 50 years of China, using each ten days precipitation data from 598 meteorological stations during 1961—2010, the precipitation anomaly percentage of each station was calculated. Through the empirical orthogonal function and rotated empirical orthogonal function, carried out the spatial analysis for the precipitation change and division of the precipitation change characteristics in recent 50 years of China, also using the linear trend analysis and 5-years moving average analysis methods, the variation characteristics of precipitation in the whole region and each district were analyzed. The results indicated that: China can be divided into 12, 11 and 11 change regions, respectively, according to the 1961—1990, 1971—2000 and 1981—2010. Synthesized the precipitaion change characteristics in three time periods, whole China can be divided into 11 regions, such as Jianghuai region, Central and Southern Northeast region, Northern part of China, Xinjiang region, Southern and South Eastern region, Huanghuai region, Eastern of Southwest region and West of Southern regions, Northern part of the Northeast region, Midwest of South China, Qinghai-Tibet region, West of the Southwest region. Through the analysis of the precipitaion change characteristics, the precipitation was tended to decrease in recent 50 years of China, but presented regional difference. The maximal precipitation decreasing trend was in Huanghuai region, and the climatic trend rate was -0.0183 mm·10 a-1. While the most obvious increase tendency of precipitation was occurred in Southern and south eastern region, the climatic trend rate was 23.2075 mm·10 a-1. |
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