Ocean mixing and heat transport at the ice front of Dotson Ice Shelf, Antarctica ...

• Main Authors: Sheehan, Peter, Damerell, Gillian, Hall, Rob, Dotto, Tiago, Zheng, Yixi, Heywood, Karen
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Amundsen Sea; Dotson Ice Shelf; Antarc*; Antarctica; Ice Shelf
• Online Access: https://dx.doi.org/10.57757/iugg23-1876; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017703

<!--!introduction!--> The Dotson Ice Shelf, which abuts the warm waters of Antarctica’s Amundsen Sea, has exhibited high rates of ocean-driven basal melting in recent decades. As part of the UK-US ITGC collaboration, we surveyed the ice front using a vertical microstructure profiler (VMP) and two ocean gliders equipped with shear and temperature microstructure probes, as well as an ordinary conductivity-temperature sensor. Closely spaced (~1 km horizontal resolution) profiles in the principal in- and outflow regions were collected using the VMP, while the gliders conducted a series of near-zonal sections along the ice front over a three-week period. The glider sections reveal a concentrated inflow, 10 km across, of Circumpolar Deep Water in the east; outflow is concentrated in the west, but occurs over the remainder of the 40 km section. Estimates of turbulent kinetic energy dissipation rate, ε, from shear and temperature, and from gliders and the VMP, generally agree to within an order of magnitude. ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...