中国近百年地面温度变化自然因子的因果链分析

The Causal Chain Analysis of Natural Factors for China Surface Temperature Variation during the Recent 100 Years

  • 摘要: 采用格兰杰(Granger)因果检验法,从自然因素的角度,即从天文因子(太阳黑子数SSN)和地球运动因子(地极移动X方向和Y方向)的角度,对我国近百年地面温度(TC)的变化进行了归因分析。所得结果如下:滞后1~11年内,SSN都不是TC的Granger原因;对于TC和极移X方向,当滞后6年时信度最高,此时极移X方向是TC的Granger原因(87%信度)。研究结果可能暗示,极移X方向的变化可能会导致6年后中国地面气温的变化。

     

    Abstract: The attribution analysis of China surface temperature(TC) in the recent 100 years is done from the angle of the astronomical factor(sunspot number, SSN) and the earth movement factor(polar shift x direction and y direction) by using Granger causality test. The results are as follows: (1) SSN is not the Granger cause of TC in all of 1 to 11 years lags; (2) when the lag is 6 years, confidence is the highest, at this time polar shift x direction is the Granger cause of TC (87% confidence); (3) when the lag is 12 years, TC is the Granger cause of the polar shifty direction, the confidence is 86%. The research results of the paper suggest that the change of polar shift x direction possibly results in the change of TC, and the change of TC possibly influences the change of the polar shiftydirection.

     

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