[A-CG34] 地球規模環境変化の予測と検出

[ACG34-P03] Developments toward coupled climate and ice sheet simulations using MIROC and IcIES

*小長谷 貴志¹、阿部 彩子¹、齋藤 冬樹²、大石 龍太¹、陳 永利¹ (1.東京大学大気海洋研究所、2.海洋研究開発機構)

キーワード：気候モデル、氷床モデル

It is essential to represent interaction and feedback between climate and ice sheets in simulating future and past climate system changes. To represent interactions between climate and ice sheet, the ice sheet model has to receive atmospheric or oceanic fields from climate models, and climate models have to receive ice sheet extent, height, and mass balance from ice sheet models. One difficulty in climate and ice sheet coupling is that the typical horizontal resolution of the climate model is coarser than that of ice sheet models: climate model MIROC4m has a horizontal resolution of ~3 degrees, while the standard horizontal resolutions of ice sheet model IcIES adopt 6 and 32 km for Greenland and Antarctic Ice Sheet, respectively. Several studies proposed methods for bidirectional coupled simulations of ice sheet models and climate models by downscaling climate fields to ice sheet model grids (e.g. Mikolajewicz et al. 2007; Charbit et al. 2008; Smith and Gregory 2012; Vizcaino et al. 2013, Fischer et al. 2014). This study presents methods of script-based coupling between climate and ice sheet models, as well as results of off-line simulations (one-way simulations), toward coupling simulations of climate and ice sheets.