A04

A04 Integrative modeling of the Antarctic Ice Sheet, ocean, and climate
The Role
We will develop numerical experiments on variations in the Antarctic ice sheet, the ocean, climate, and material circulation at the various time scales by incorporating the latest findings from observations by other research groups into each modeling method accumulated.
We will try to understand the interaction between the Antarctic and global environmental changes, and the “tipping point”, which is a critical threshold when a transition to a new state occurs in the Antarctic ice sheet.
Research overview
Analysis of the Antarctic ice sheet and the ocean variability: We will build a model that can calculate the interaction between the ice sheet, the ocean, and the solid Earth. We will analyze factors on the observational evidence through integrated research on observations and models. We will conduct this research project   in collaboration with the bottom water group, the ecosystem group, the ice sheet group, the solid earth group, and the exploration group.
Integrated research on climate modeling and data over the past few million years, including a “very warm period”: Using survey data on ice cores, deep-sea cores, and topography for the input and verification, we will conduct modeling studies of the material circulation such as the ice sheet, the ocean, sea ice, carbon, and water isotopes. We will also analyze their variation mechanisms in collaboration with the paleoceanography group, the ice sheet group, and the solid earth group.
Understanding of the tipping points and future predictions: Using the results of models and data, we will clarify the condition and mechanism when the Antarctic ice sheet and the bottom water formation pass a tipping point. We will also plan for the future research. We will conduct this project in collaboration with the bottom water group, the paleoceanography group, the ecosystem group, the ice sheet group, and the solid earth group.