On the influences of the continental shelf bathymetry correction in Prydz Bay, East Antarctica ...

• Main Authors: Sun, Chong, Liu, Chengyan, Wang, Zhaomin
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: East Antarctica; Prydz Bay; Antarc*; Antarctica; Ice Shelves
• Online Access: https://dx.doi.org/10.57757/iugg23-1047; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018193

<!--!introduction!--> The bathymetry around Antarctica can govern the shelf sea circulations and play a key role in conditioning water masses. In Prydz Bay, the Prydz Bay Gyre and coastal currents are also determined by the continental shelf topography. However, due to the paucity of beam echo sounding data, the bathymetric datasets in Prydz Bay still have large uncertainties. With the aid of in situ hydrographic observations, this study focuses on the correction of an up-to-date bathymetric dataset and the resultant influences on the shelf circulation and the basal melting of the ice shelves. The corrected bathymetry mainly improves the biased shallow representations in the uncorrected bathymetric data set, with a maximum change of ~500 m deepening in the eastern flank of Prydz Bay. Sensitivity numerical experiments show that the bathymetric corrections in Prydz Bay have a significant impact on the circulation pattern and onshore warm water intrusions. In addition, the corrected bathymetry markedly ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...