Effects of total eclipse of the sun in november 12th, 1966 in Bagé (RS), Brazil, on the meteorological parameters

Frederico Luiz Funari,Paulo Marques Dos Santos

doi:10.33958/revig.v39i3.603

Frederico Luiz Funari, Paulo Marques Dos Santos

Open Access

https://doi.org/10.33958/revig.v39i3.603

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Abstract

This work presents the evaluation of the thermal sensitivity index and global radiation during the total eclipse of the sun on November 12th, 1966, in the city of Bagé, RS, Brazil, located in the central line of the totality range of the eclipse. Temperature (oC), relative air humidity (%), cloudiness and wind speed were acquired in the international airport of the city for the calculation of the resultant temperature index by using Missenard’s method (1948). Global radiation data was obtained from Eppley spectral radiometer. The results showed a variation in thermal sensation, due to the decreased global radiation and corresponding decreased temperature and increased relative humidity during the eclipse.

Highlights

In astronomy, eclipse refers to the partial or total obscuration of a celestial body due to the interposition of another
The objective of the present study was to evaluate the modifications on air temperature, relative humidity (%), global radiation (W m-2), wind (m s-1) and cloud cover during the total eclipse of the sun in November 12th, 1966 in Bagé (RS), Brazil
There was a decrease in air temperature, with consequent increase of the relative humidity

Summary

Introduction

Eclipse refers to the partial or total obscuration of a celestial body due to the interposition of another. When a new moon is in perfect alignment with the Earth and the sun, it projects a cone of shadow that can reach regions of the terrestrial surface, completely or partially eclipsing the sun. The fact that the sun and the moon present almost the same apparent diameter (about half a degree), and being the eclipse of the sun caused by the projection of lunar shadow on Earth, this phenomenon is impossible to be seen at the same time from all points of the globe. Due to the centering of the axis of the conelike shadow, the solar eclipse can be partial, total, or even annular – i.e., when the lunar diameter is Funari & Marques dos Santos inferior to the one of the sun at that moment. A total solar eclipse can last up to 7 minutes during its peak (total darkening)

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