BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Anna Wåhlin (University of Gothenburg) (University of Gothenburg) DTSTART:20250206T020000Z DTEND:20250206T030000Z DTSTAMP:20260703T185600Z UID:RSES_school_seminar/270 DESCRIPTION:Title: Swirls and scoops - Ice-base melt revealed by multibeam imag ery of an Antarctic ice shelf\nby Anna Wåhlin (University of Gothenbu rg) (University of Gothenburg) as part of ANU Research School of Earth Sci ences school seminar\n\nLecture held in Jaeger 1 Seminar Room\, Research S chool of Earth Sciences\, ANU Acton campus.\n\nAbstract\nKnowledge gaps ab out how the ocean melts Antarctica’s ice shelves\, borne from a lack of observations\, lead to large uncertainties in sea level predictions. Using high-resolution maps of the underside of Dotson Ice Shelf\, West Antarcti ca\, we reveal the imprint that ice shelf basal melting leaves on the ice. Convection and intermittent warm water intrusions form widespread terrace d features through slow melting in quiescent areas\, while shear-driven tu rbulence rapidly melts smooth\, eroded topographies in outflow areas\, as well as enigmatic teardrop-shaped indentations in the ice. Full-thickness ice fractures\, with bases modified by basal melting and convective proces ses\, are observed throughout the area. This new wealth of processes\, all active under a single ice shelf\, must be considered to accurately predic t future Antarctic ice shelf melt.\n\nZoom recording passcode:rN4LA%p2\n LOCATION:https://researchseminars.org/talk/RSES_school_seminar/270/ END:VEVENT END:VCALENDAR