Coastal and offshore controls on the variability of the Undercurrent in the Amundsen Sea ...

• Main Authors: Dragomir, Oana, Silvano, Alessandro, Hogg, Anna, Meredith, Michael, Nurser, George, Naveira Garabato, Alberto
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Amundsen Sea
• Online Access: https://dx.doi.org/10.57757/iugg23-1663; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017938

<!--!introduction!--> The marine-terminating glaciers of the Amundsen Sea are experiencing increased basal melting associated with an inflow of warm and salty water from the deep ocean onto the shelf via submarine glacial troughs. Modelling work suggests that variability in the transport of this source of heat across the shelf-break and onto the Dotson Trough in the western Amundsen Sea is regulated by wind-driven changes in an eastward undercurrent that flows along the continental slope. What controls the strength and variability of the undercurrent, however, is not well documented due to a lack of observations in the region. Here, we use mooring records of undercurrent velocity near the shelf break in the Amundsen Sea throughs in conjunction with a novel 5-year altimetric sea level product that includes measurements in regions of near-perennial ice cover to describe the connection between undercurrent variability and climate on seasonal to interannual time scales. We find a robust signature of the ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...