[A-OS24] Exploring new frontiers of oceanic mixing research in the next decade

[AOS24-09] Eddy-resolved ocean characteristics of the MIROC coupled model incorporating effects of tidal mixing of the 18.6-yr modulation

*松浦 知徳¹、建部 洋晶²、安田 一郎¹ (1.東京大学、2.海洋研究開発機構)

キーワード：MIROC結合モデル、18.6年潮汐周期、渦解像モデリング、千島ーアリューシャン列島、東南アジア沖、長周期変動

A comparative study of long-term simulations (200-500 years) of three versions of the MIROC coupled model (MIROC3.2, MIROC5.2, and MIROC6.subhi) was performed. This model incorporates the effects of the 18.6 tidal period into the ocean mixing process. It is revealed that in Miroc6.subhi, the main factors of ocean-atmosphere interaction (SST, SSH, SLP) and the internal structure distribution of the ocean (potential temperature, salinity, potential density, and current) were the most consistent with the observations. Long-term variability (decadal to multidecadal) was evident in the waters off the Kuril-Aleutian and off Southeast Asia where tidal and topographical interactions are prominent.