Geomorphic evidence for along-margin ice flow from Melville Bugt slope, west Greenland

• DOI: 10.5194/egusphere-egu24-12152
• Publication Date: 2024-03-08T22:29:45Z
• Authors: Shannon Klotsko; Rob Hatfield; Brendan Reilly; Alan Mix; Anne Jennings; Erin Gregory; Joe Stoner; Maureen Walczak; Jonas Donnenfield; Cara Fritz; Alice Hough; Robert Kelleher; Lindsay Monito; Paloma Olarte; Megan Siragusa; Katherine Stelling; Tobias Vonahme
• Keywords: Margin (machine learning); Groenlandia

In summer 2023, the Baffin Bay Deglacial Experiment (BADEX) completed a 33-day cruise focused on west Greenland margin; overarching goal of this project is to investigate evolving ocean and ice conditions along sheet from last glacial maximum through deglaciation. The collected seafloor sub-seafloor data, as well water plankton samples, with aim establishing 1) timing extent warm Atlantic incursion north-western 2) phasing initial margin retreat relative oceanic atmospheric changes; 3) role local or regional shelves in buttressing trough-bound outlet glaciers; 4) influence geology, geomorphology, dynamics ice-margin retreat. Here, we present results ~600 km new multibeam sonar data slope just north Melville Bugt trough mouth fan (TMF). this area curves landward, forming crescent-shaped, submarine amphitheater that contains range bathymetric features, which vary form depth their proximity TMF. This includes series contour-following ridges occur depths ~1000 ~450 meters below modern level. These are more prominent farther away TMF but numerous closer trough. They interpreted be glaciogenic origin, potentially formed by an shelf, fed trough, flowed grounded slope. These other extending up 2000 will discussed. add our understanding configuration northern during after period.