Were based on the fact that the Antarctic ice is present due to the fact that the winter seasons in the southern hemisphere are longer than the winter in the northern hemisphere by up to 8 days thus allowing additionally longer time for the Antarctic ice to form.The effect, as Fligge, Solanki, Unruh, FroK, & Wehrli (1998) observes, result in the thickness of the Antarctic ice being more than the Arctic region. Winter was defined by Adhemar as the period between the equinoxes (the period when the sun is overhead the equator). Besides these observations, the difference in duration of seasons have been observed by Fligge, Solanki, Unruh, FroK, & Wehrli (1998) based on Keplers second law as well as in the fact that the earth moves closest to the sun during the perihelion period. This period, perihelion period currently occurs during the winter seasons in the northern hemisphere. Adhemar’s views and observations were later modified by Fligge, Solanki, Unruh, FroK, & Wehrli (1998), who argued that the variations in the amounts of insolation experienced around the globe and which results into ice melts is associated with the distance from a point on the earth’s surface from the sun.Recent studies by NASA (2014) tend to concur with these arguments. NASA notes that several factors handle the variations in the extent of ice melts experienced in various parts of the world. Among these include the nature and extent of tilt that has occurred on the earth’s axis and which is responsible for the occurrence of seasons, the shape of the earth’s orbit that determines the earth’s distance from the sun at different points in its orbital path, and the average distance of the earth to the sun. Regarding these matters, NASA (2014) reports further indicates that the earth’s orbit has tilted by 230. This variation affects the latitude of the sun by making it to vary by about 230 in the northern hemisphere and the beginning of the summer seasons in the northern hemisphere. This makes the suns insolation to vary in intensity and duration in the northern and the southern hemisphere. The variations in the solar intensity across the seasons results into the variations in the magnitude of the polar ice melts in terms of spatial and depth.Experimental studies indicate that the amount of distance travelled by heat to reach a particular point determines the intensity of heat received at the point. Also to the distance, clarity of the atmosphere is another
Fligge, M., Solanki, S., Unruh, Y., FroK, h. C., & Wehrli, C. (1998). A model of solar total spectral irradiance variations. Astronomy and Astrophysics, 335, 709-718.
NASA banner. (2014, January 21 ). Solar System Exploration. Retrieved June 17, 2015, from Science and Technology: http://www.nasa.gov/audience/foreducators/postsecondary/features/F_Planet_Seasons.html
NASA. (2015, June 15). What causes the seasons. Retrieved June 17, 2015, from http://spaceplace.nasa.gov/seasons/en/
Unruh, Y., Solanki, S., & Fligge, M. (1999). The spectral dependence of facular contrast and solar irradiance variations. Astronomy Astrophysics, 345, 635-642.
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