Analysis of precursors of tropical cyclogenesis during different phases of the solar cycle and their correlation with the Dst geomagnetic index

作者：Pazos Marni^*; Mendoza Blanca; Gimeno Luis

来源：Journal of Atmospheric and Solar-Terrestrial Physics, 2015, 133: 54-61.

DOI：10.1016/j.jastp.2015.07.020

• Tropical cyclogenesis
• Solar activity
• Geomagnetic activity

Three tropical cyclogenesis precursors, (absolute vorticity, relative humidity, vertical shear)and, the combined Genesis Potential Index are investigated in order to analyse their behaviour during three different phases(descending, minimum and ascending) of the solar cycle. The correlation between these tropical cyclogenesis precursors and the Dst geomagnetic index is also assessed, with the main finding being that the correlations between both the Genesis Potential Index and the vertical shear with the Dst index are statistically significant. This result suggests that the relationship between geomagnetic activity and tropical cyclones might be modulated by the influence of geomagnetic activity on the vertical wind shear.

• 出版日期2015-10