Variability and remote controls of the warm-water halo and Taylor cap at Maud rise ...

• Main Authors: Gülk, Birte, Roquet, Fabien, Naveira Garabato, Alberto C., Narayanan, Aditya, Rousset, Clément, Madec, Gurvan
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Maud Rise; Weddell; Weddell Sea
• Online Access: https://dx.doi.org/10.57757/iugg23-2594; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019295

<!--!introduction!--> The region of Maud Rise, a seamount in the Weddell Sea, is known for the occurrence of irregular polynya openings during the winter months. Hydrographic observations have shown the presence of a warmer water mass below the mixed layer along the seamount’s flanks, commonly termed the warm-water Halo, surrounding a colder region above the rise, the Taylor Cap. A combination of observational data sets, an eddy-permitting reanalysis product and a regional high-resolution configuration allows to investigate the properties of these features and shows a strong interannual variability. A warming of deep waters is observed in the Taylor Cap during the years preceding the opening of the Polynya in 2016 and 2017, starting in 2011. By analyzing regional simulations, we are able to demonstrate that most of the observed variability in the warm-water Halo is forced remotely by advection of Weddell Gyre deep waters in the region surrounding Maud Rise. Deep water anomalies found in the Halo are ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...