My research interest is to study past environmental changes quantitatively so that the results can be used for better understanding physics of earth's various components such as cryosphere, ocean and atmosphere. I have been using various geochemical and geophysical measures to obtain high-resolution data spatially and temporary since Earth's climate is very complex and non-linear system and hence it requires comprehensive approaches. Samples that I have used are Antarctic ice cores, Deep Sea and Lake sediments, Corals, Tree rings, and so forth. Since I have been also studying sea-level changes extensively, assessing human migrations and climate impacts on cultural developments also have been tackled. Recently started projects includes assessing stability of Antarctic ice sheets, Sun-Climate linkage, Tropical oceanic role for climate changes and Coral-AOGCM based Pacific oceanic changes.