EGU23-4043, updated on 22 Feb 2023
EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Impacts of tide and cavity geometry on ocean-driven melting beneath the Nansen Ice Shelf

Taekyun Kim1, Ji-Seok Hong2, Jae-Hong Moon1, and Emilia Kyung Jin3
Taekyun Kim et al.
  • 1Jeju National University, Department of Earth and Marine Sciences, Jeju-si, Korea, Republic of (
  • 2Ocean Circulation Research Center, Korea Institute of Ocean Science and Technology, Korea, Republic of
  • 3Division of Glacial Environment Research, Korea Polar Research Institute, Korea, Republic of

Mass loss from ice shelves occurs through ocean-driven melting regulated by dynamic and thermodynamic processes in sub-ice shelf cavities. However, the understanding of these oceanic processes is quite limited because of the scant observations under ice shelves. Here, a regional coupled sea-ice/ocean model that includes physical interactions between the ocean and the ice shelf is used as an alternative tool for exploring ocean-driven melting beneath the Nansen Ice Shelf (NIS), Terra Nova Bay (TNB), Antarctica.

We will first show the spatiotemporal variability signatures for different modes of ocean-driven melting at the base of the NIS. Our model includes detailed bathymetry and ice shelf base topography based on in-situ observation and has been run with and without tides. We have also investigated how tide and model geometries (i.e., cavity geometry) affect the water mass transformations and ice shelf melting/freezing regimes at the base of the ice shelf which significantly affect the ice shelf stability.

How to cite: Kim, T., Hong, J.-S., Moon, J.-H., and Jin, E. K.: Impacts of tide and cavity geometry on ocean-driven melting beneath the Nansen Ice Shelf, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-4043,, 2023.