[A-OS11] Ocean Mixing Frontiers

[AOS11-13] Internal tide radiation and intensified mixing in the Philippine Sea

*Zhenhua Xu¹、Jia You¹、Yang Wang¹、Qun Li¹、Toshiyuki Hibiya²、Robin Robertson³ (1.Institute of Oceanology, CAS、2.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, Japan、3.Xiamen University Malaysia, Malaysia)

キーワード：Internal tides, Turbulent mixing

The spatially inhomogeneous and seasonally variable diapycnal diffusivities in the upper Philippine Sea were estimated from ARGO float data using a strain-based finescale parameterization. We found that internal tides are the main driving process for diapycnal diffusivities. Based on a coordinated analysis of multi-source data, we provide evidence that the mesoscale environment in the Philippine Sea played a significant role in regulating the intensity and shaping the spatial inhomogeneity of the internal tidal mixing. The combined and relative contributions of various factors to the long-range radiation and dissipation map of internal tides were also clarified.