Topography-mediated transport of warm deep water across the continental shelf slope, East Antarctica ...

• Main Authors: Liu, Chengyan, Wang, Zhaomin, Liang, Xi, Li, Xiang, Li, Xichen, Cheng, Chen, Qi, Di
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Antarctic; East Antarctica; The Antarctic; Antarc*; Antarctica; Ice Sheet; Ice Shelf; Ice Shelves
• Online Access: https://dx.doi.org/10.57757/iugg23-0322; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016138

<!--!introduction!--> Warm Deep Water intrusion over the Antarctic continental shelves threatens the Antarctic ice-sheet stability by enhancing the basal melting of ice shelves. In East Antarctica, the Antarctic Slope Current (ASC), along with the Antarctic Slope Front (ASF), acts as a potential vorticity barrier to prevent the warm modified Circumpolar Deep Water (mCDW) from ventilating the cold and fresh shelf. However, mCDW onshore transport is still observed within certain shelf regions, such as submarine troughs running perpendicular to the continental shelf. This study focuses on the dynamic mechanisms governing mCDW intrusion within a submarine trough over the fresh shelf regions, East Antarctica. Based on an idealized eddy-resolving coupled ocean-ice shelf model, two high resolution process-oriented numerical experiments are conducted to reveal the mechanisms responsible for the mCDW onshore transport. Three dynamic mechanisms governing cross-slope mCDW intrusion are identified: 1) the bottom ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...