[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)

Keywords: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.