EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Impact of the barotropic tides on the seasonal Indonesian Throughflow 

Oceane Richet, Bernadette Sloyan, Bea Pena-Molino, and Maxim Nikurashin
Oceane Richet et al.

The Indonesian seas play a fundamental role in the coupled climate system, featuring the only tropical exchange between ocean basins in the global thermohaline circulation. The Indonesian Throughflow (ITF) carries Pacific Ocean warm pool waters through the Indonesian Seas, where they are cooled and freshened. The incoming Pacific waters are strongly modified via vertical mixing driven by numerous ocean processes and ocean-atmosphere fluxes. The result is a unique water mass that can be tracked across the Indian Ocean basin and beyond. With our high-resolution regional model of the Indonesian Seas, designed with the MITgcm, we focus our study on the impact of the barotropic tides on the ITF. In fact, the strong tides coming from the Pacific and Indian Oceans enter in the Indonesian Seas through narrow straits and interact with the complex topography of the region (sills, islands, deep seas). This interaction between the tides and the topography impacts directly the ITF by modifying the transport toward the Indian Ocean.

How to cite: Richet, O., Sloyan, B., Pena-Molino, B., and Nikurashin, M.: Impact of the barotropic tides on the seasonal Indonesian Throughflow , EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-9307,, 2021.

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