Spatio-temporal distribution of the climatic seasonsin China from 1961 to 2016
Received date: 2018-11-26
Request revised date: 2020-01-16
Online published: 2020-05-25
Supported by
National Natural Science Foundation of China(41561024)
National Natural Science Foundation of China(31760241)
Copyright
In this study, the spatio-temporal distribution characteristics of the climatic seasons in China from 1961 to 2016 are analyzed by using the climatic seasonal division standard (QX/T152-2012) issued by the China Meteorological Administration, the Chinese daily surface temperature dataset (V2.0, 0.5°×0.5°) issued by the National Meteorological Information Center, and the revised multiple regression model. The linear trend and extreme-point symmetric mode decomposition method (ESMD) are used to analyze the variations in the distribution area, durations, and start date of the climatic seasons. The main results are as follows. There are four climatic seasonal regions in China, namely, the perennial-winter, no-winter, no-summer and discernible regions, while there are no perennial-summer or perennial-spring regions. Considering the area variation of each region, the range of the perennial-winter region is significantly narrower, and the area of no-winter region increases, while the areas of no-summer and discernible regions have no significant changes. The regions with significant changes in the normal climatic seasons are mainly distributed in the Qinghai-Tibet Plateau and the Inner Mongolia Plateau. The regions with significant changes in the durations of the climatic seasons are mainly found in the northern China. The advance of the summer start date has led to a significant increase in the durations of climatic seasons in the central and western Inner Mongolia, Hexi Corridor and Xinjiang, and the postponement of the winter start date has resulted in a decrease in the number of winter days in these areas. In general, the climatic seasons at high altitudes in western China have more significant changes than those in the eastern coastal plains. Overall, the distribution and changes of the climatic seasons in China are revealed by this investigation, which could provide a reference for operational weather forecasting and climatic region division.
MA Bin , ZHANG Bo . Spatio-temporal distribution of the climatic seasonsin China from 1961 to 2016[J]. Acta Geographica Sinica, 2020 , 75(3) : 458 -469 . DOI: 10.11821/dlxb202003002
表1 不同气候基准期中国气候季节长度的多元回归模拟Tab. 1 Multiple regression models for the duration of climatic seasons in China for different climate normals |
气候基准期 | 气温界限(℃) | 多元回归模型 | 显著性水平 | |
---|---|---|---|---|
1961—1990年 | 10 | 0.97 | 0.001 | |
22 | 0.958 | 0.001 | ||
1971—2000年 | 10 | 0.97 | 0.001 | |
22 | 0.958 | 0.001 | ||
1981—2010年 | 10 | 0.97 | 0.001 | |
22 | 0.959 | 0.001 |
图3 1961—2016年各气候季节分区面积占中国大陆面积比例及其变化趋势Fig. 3 The area proportions of different climatic seasonal divisions and the variation trend in China from 1961 to 2016 |
表2 1961—2016年各气候季节分区面积变化倾向率Tab. 2 The area-changing tendency rate of the climatic seasonal divisions in China from 1961 to 2016 |
常冬区 | 无冬区 | 无夏区 | 四季分明区 | |
---|---|---|---|---|
倾向率(%/10a) | -0.69 | 0.22 | 0.08 | 0.39 |
R2 | 0.69 | 0.15 | 0.01 | 0.18 |
显著性水平 | 0.001 | 0.01 | 无 | 无 |
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