Research for Length Change of Four Seasonsover China in Recent 47 Years

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Plateau Meteorology ›› 2011, Vol. 30 ›› Issue (1) : 182-190.

Research for Length Change of Four Seasonsover China in Recent 47 Years

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Abstract

Using the daily temperature data at 599 stations in 1961-2007, the length change trends of four seasons during the past 47 years was analyzed. The results show that throughout the change region of length of seasons are: The spring becomes shorter(-0.8 d·(10a)-1), the summer, longer(3.2 d·(10a)-1), the autumn, shorter(-0.5 d·(10a)-1), and the winter, shorter(-1.6 d·(10a)-1). This trend is different in spatial distribution, namely more obvious in the North of China than in the South, and more obvious in the eastern part of China than in the western part. Summer change is the most obvious, but autumn change has little comparatively. This trend is highly obvious in the North, East China, Central China and South China. In the Southwest of China the summer becomes longer and the winter shorten starts in the 21st century. The Plateau region has a trend that the spring becomes longer and the winter becomes shorter from 1980s. The average annual temperature increases during the past 47 years, the change of the average annual temperature occurs preceding the season length, the average annual temperature has a rather influence on the length change of season.

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The four-season leng / Standard for season / Season change / Global warming / Climate trend coeffi

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. Research for Length Change of Four Seasonsover China in Recent 47 Years. Plateau Meteorology. 2011, 30(1): 182-190

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