JpGU-AGU Joint Meeting 2020

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A (Atmospheric and Hydrospheric Sciences ) » A-OS Ocean Sciences & Ocean Environment

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

convener:Toshiyuki Hibiya(Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo), Ichiro Yasuda(Atmosphere and Ocean Research Institute, The University of Tokyo), Lakshmi Kantha(Aerospace Engineering Sciences, University of Colorado, Boulder, Colorado, USA)

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

*Tomonori Matsuura 1, Hiromasa Tatebe2, Ichiro Yasuda1 (1.The University of Tokyo , 2.Japan Agency for Marine-earth Science and Technology )

Keywords:MIROC coupled model, 18.6-yr tidal period, eddy-resolving modeling, Kuril-Aleutian Ialands, off Southeast Asia, long-term variability

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.