Abstract
Eclipse induced changes in solar radiation is a common interest of scientists all over the world. The disturbance of the heat balance along the supersonic travel of the trajectory of the Moon’s shadow could generate gravity waves during solar eclipse, which results a reduction in the concentration of ozone layer in the stratosphere. We, in this context, conducted some experiments to detect the possible radiations reaching the surface of the earth and the impact of such radiation in seawater during the recent total and annular solar eclipses. This is the first time that the variation in pH value of seawater during solar eclipse is examined, and the experimental data demonstrated that the solar eclipse phenomenon affects the pH value of seawater due to the shorter wavelength radiations received on the surface of the earth. The reduction is around 20% and 40% of the difference between ordinary water and seawater during total and annular eclipses respectively. The multidisciplinary influences of these findings are addressed.
Highlights
The solar eclipse being a rare natural phenomenon gives an opportunity to investigate how the ionising radiations react to the material surface of the earth due to the fast solar radiation changes
India had a total solar eclipse on 22 July 2009, which was visible over the central India, while a partial eclipse in southern part, and an annular eclipse on 15 January 2010, and this paper focuses on the study conducted on sea water during these events
A significant decrease in the pH value of seawater is recorded on the total solar eclipse day, 22 July 2009, when exposed to solar radiation during the eclipse period, which reveals an increase in Hydrogen ion activity in seawater
Summary
The solar eclipse being a rare natural phenomenon gives an opportunity to investigate how the ionising radiations react to the material surface of the earth due to the fast solar radiation changes. A huge quantity of shorter wavelength radiations are expected to reach the earth’s surface during solar eclipse since the disturbance of the heat balance along the supersonic travel of the trajectory of the Moon’s shadow could generate eclipseinduced gravity waves [1,2,3,4], which results a reduction in the concentration of ozone layer in the stratosphere [1,5,6,7]. Several measurements of solar radiation were carried out since 1960; recent works [7,8] focussed on the study of eclipse-induced changes in the spectral solar irradiance at the earth’s surface, the effect of multiple scattering on sky brightness, and the wavelength dependence of the limb darkening effect etc. India had a total solar eclipse on 22 July 2009, which was visible over the central India, while a partial eclipse in southern part, and an annular eclipse on 15 January 2010, and this paper focuses on the study conducted on sea water during these events
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