Abstract:
Variations in the first Euler angle known as Earth precession phenomenon which is
described as a change in the Earth’s orbit; found to have strong impact on the climate of
Earth. These observations of climate changes were connected with the behavior of the
global ice sheets, including their advancing and retreating movements which have been
recorded. In fact, Earth’s climate depends essentially on the cycle of glaciers' growth and
reduction. The alternative glacial periods and the interglacial periods coincide with the
variations in Earth’s orbit known as “Milankovitch cycles”, which affect the insolation,
and the sunlight exposure of different regions of the world and thus ultimately the behavior
of ice formation. This paper aims to document the variations of the Earth’s axis
orientation and to discuss how these changes have affected to the sea-level fluctuation of
the South Asian Region during late Pleistocene. Experiment methodology consists of
compelling a standardized dataset of the sea-level index (Data SET 01-Radiocarbon
Journal, Katupotha. J, Data SET 02- SEAMIS database and selected 35 number of carbon
dating values recorded and published in the literature of the South Asian Region) and then
compare it with the data of Milankovitch Cycles. The discussed results show that the sealevel
variations occurred mainly between 12,500 ± 1,500 YBP to 11,000± 1,500 YBP,
indicating that 25m ± 5m recorded to be the lower sea level documented than the current
sea level found around the South Asian region. This has been resulted by a quick glacier
transition that happened in the Late Pleistocene.
