Sponsor: National Science Foundation
Columbia University: Xiaojun Yuan
First Institute of Oceanography, China
University of Copenhagen, Denmark
May 2015 – April 2020
The overarching goal of our research is to understand the significance of the polar ocean in the Prydz Bay region of Antarctica to the global climate system through estimating the formation and export of dense shelf water in the region and illustrating the dynamic processes involved. Specific scientific questions that we are addressing include:
We are conducting three years of fieldwork with CTD/LADCP surveys including 2 yearly repeat sections and mooring deployments at critical sites to monitor seasonal-interannual variability of CDW intrusion, dense shelf water accumulation and export as well as overflow from the Prydz Bay shelf on the slope. A high-resolution regional ocean-sea ice coupled model will be developed to provide time and space continuous three-dimensional ocean state estimation. Both in-situ and remote sensing observations and modeling simulation results will be used to investigate (i) the local atmosphere-ocean-sea ice interaction and shelf processes that produce dense shelf water and (ii) the dynamic processes that control the shelf water export.
Work is in progress.
Poster: “Subantarctic Mode Water and Pycnocline Ventilation,” by B. Johnson at the 2018 Ocean Sciences meeting.