[A-AS01] 大規模な水蒸気場と組織化した雲システム

[AAS01-12] NICAMを用いたHighResMIP気候実験と富岳における将来展望

★招待講演

*小玉 知央¹、山田 洋平¹、大野 知紀¹、清木 達也¹、八代 尚²、野田 暁¹、中野 満寿男¹、Roh Woosub³、佐藤 正樹^3,1、新田 友子³、五藤 大輔²、三浦 裕亮⁴、那須野 智江¹、宮川 知己³、Chen Ying-Wen³、杉 正人⁵ (1.海洋研究開発機構、2.国立環境研究所、3.東京大学大気海洋研究所、4.東京大学大学院理学系研究科、5.気象研究所)

キーワード：気候シミュレーション、雲解像モデル

The Non-hydrostatic ICosahedral Atmospheric Model (NICAM), a global model with an icosahedral grid system, has been under development for nearly two decades. Here, we present its recent updates for the Coupled Model Intercomparison Project Phase 6, High Resolution Model Intercomparison Project (HighResMIP) and their impact on the simulated mean states using 56-14km mesh model. Major updates include updates of the cloud microphysics scheme and land surface model, introduction of natural and anthropogenic aerosols and a subgrid-scale orographic gravity wave drag scheme, and improvement of the coupling between the cloud microphysics and the radiation schemes. A short-term sensitivity experiments demonstrate improvements in the ice water content, high cloud amount, surface air temperature over the Arctic region, location and strength of zonal mean subtropical jet, and shortwave radiation over Africa and South Asia. The decadal climate simulations further reveal an improvement in the genesis and structure of the tropical cyclones compared with those with the previous model. Finally, we will address outlook toward the cloud-resolving climate simulation based on a fresh benchmark result on supercomputer Fugaku.