Paleoclimate Research Group

Using a hierarchy of climate models with varying degrees of complexity, this project will explore the physical and chemical processes that control past changes of climate, ice sheet extent and oceanic circulation. It also validates climate models based upon the simulation of the climates of geological past such as the last glacial maximum and the late Cretaceous period.

The emphasis of this project is also on the quantitative assessment of the astronomical theory of glacial/interglacial fluctuation of global climate during the Quaternary. Using coupled or uncoupled ocean-atmosphere-continental ice sheet models of varying degrees of complexity, this project inquires why the changes of EarthÕs orbit around the Sun had an enormous impact upon the fluctuation of ice volume and global climate. In addition, this project will attempt to project future changes in Greenland and Antarctic ice sheets associated with global warming.

These studies are conducted in close collaboration with the Center for Climate System Research (CCSR) of the University of Tokyo.