Cairo University

MTPR Journal


Solar forcing on cyclones - case study: Gonu 2007

2014-12-19 & doi:
Shahinaz Yousef, M. A. El-Rafy, Huma Abdallah Thani Al Hadabi

This paper establishes the physical cause and effect relationships between solar stimuli and terrestrial responses. The solar stimuli in our case is a fast stream of solar wind emanated from a coronal hole. This stream got through the Earth's magnetosphere like a bullet and hit a particular spot of the troposphere above the Arabian Sea on 31 May 2007. There the protons, ions and electron energies were deposited and heated the atmosphere. The hot spot expanded and formed a low-pressure spot above the Sea thus accelerated evaporation. The electric charges in this particular spot act as nuclei for water condensation and formation of intense clouds. As a second step, solar wind streams hit the two polar atmospheres, inducing two surface Meridional wind velocities that moved equator wards. The northern wind and the southern winds met at the cloud spot over the Arabian Sea and formed a torque that caused the clouds to rotate about the central eye. Thus, Hurricane Gonu was fully developed on early June 2007. Thus, the stimuli is the coronal hole stream and the response is the hurricane.