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The combined influences for solar-geomagnetic activities and the atmospheric circulation NAO on global surface temperatures
Indian Journal of Physics ( IF 1.6 ) Pub Date : 2020-06-01 , DOI: 10.1007/s12648-020-01757-9
M. A. El-Borie , A. A. Thabet , E. S. El-Mallah , M. Abd El-Zaher , A. A. Bishara

This work aims to investigate the effect of solar-geomagnetic activities on atmospheric circulation and to examine their influences on global surface temperature (GST). Used data are the sunspot number (Rz) as a solar activity index, geomagnetic activity index (aa), the North Atlantic Oscillation index (NAO), and GST. We have performed an extensive analysis by using the wavelet power spectra (WPS) and global wavelet spectra (GWS). Results from WPS showed that both NAO and GST exhibited periodicities of ~ 22 years and 11 years, indicating the imprint of solar activity on both parameters. Additionally, the WPS of NAO exhibited three dominant modes; firstly, periodicity of 2 to 4 years appeared in the time intervals: (1954–1967), (1987–1997), and (2007–2015), possibly related to El-Nino Southern Oscillation. Secondly, sporadic oscillation of 1 to 2.5 years observed during the whole period, which corresponding to quasi-biennial oscillation. Finally, oscillatory modes with high power on the band 7 to 8.5 years are observed on NAO spectrum: 7.6 years for the period (1872–1892) and 8.3 years for 1996–2005. This oscillatory mode with enhanced power in the 8.3 years has been detected significantly on the GWS of GST, indicating the influence of climatic pattern on GST. Our results showed that the solar-geomagnetic activities influence partially and indirectly on GST through atmospheric circulation pattern.



中文翻译:

太阳地磁活动和大气环流NAO对全球地表温度的综合影响

这项工作旨在调查太阳地磁活动对大气环流的影响,并研究其对全球地表温度(GST)的影响。使用的数据是作为太阳活动指数的黑子数(Rz),地磁活动指数(aa),北大西洋涛动指数(NAO)和GST。我们已经使用小波功率谱(WPS)和全局小波谱(GWS)进行了广泛的分析。WPS的结果表明,NAO和GST均表现出约22年和11年的周期性,这表明太阳活动在这两个参数上都有印记。另外,NAO的WPS表现出三种主导模式。首先,每隔2到4年的周期出现在时间间隔中:(1954–1967),(1987–1997)和(2007–2015),这可能与厄尔尼诺南部涛动有关。其次,偶发振荡为1到2。在整个时期内观测到5年,这对应于准两年振荡。最后,在NAO频谱上观察到在7至8.5年频段上具有高功率的振荡模式:时期(1872-1892年)为7.6年,1996年至2005年为8.3年。在GST的GWS上已明显检测到这种8.3年功率增强的振荡模式,表明气候模式对GST的影响。我们的结果表明,太阳地磁活动通过大气环流模式部分或间接地影响了GST。在GST的GWS上已明显检测到这种8.3年功率增强的振荡模式,表明气候模式对GST的影响。我们的结果表明,太阳地磁活动通过大气环流模式部分或间接地影响了GST。在GST的GWS上已明显检测到这种8.3年功率增强的振荡模式,表明气候模式对GST的影响。我们的结果表明,太阳地磁活动通过大气环流模式部分或间接地影响了GST。

更新日期:2020-06-01
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