Observed summer to winter evolution of the ocean mixed layer over the Maud Rise in the Weddell Sea ...

• Main Authors: Lindeman, Margaret, Naveira Garabato, Alberto, Silvano, Alessandro, du Plessis, Marcel, Swart, Sebastiaan, Roquet, Fabien, Gülk, Birte
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Maud Rise; Southern Ocean; Weddell; Weddell Sea; Sea ice
• Online Access: https://dx.doi.org/10.57757/iugg23-4001; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019828

<!--!introduction!--> Air-sea-ice fluxes of heat, freshwater, and carbon in the Southern Ocean are critical to global ocean circulation and climate. During the ice-free summer months, carbon-rich Warm Deep Water (WDW) around Maud Rise in the eastern Weddell Sea is insulated from the atmosphere by a surface mixed layer and residual Winter Water layer. Fluxes across the mixed layer base control exchanges between WDW and the atmosphere, as well as determining water column stability in early winter at the onset of sea ice formation. A weakly stratified winter mixed layer could be susceptible to overturning, leading to ventilation of heat from WDW and the possible formation of an open ocean polynya, as observed over Maud Rise in the 1970s and 2016-17. We use high-resolution observations from autonomous platforms deployed during the 2022 SO-CHIC campaign to analyze the summer to winter mixed layer evolution in the Maud Rise region. 6 free-drifting UpTempO buoys collected over 12,500 hourly temperature ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...