Recent changes in two outlet glaciers in the Antarctic Peninsula using multi-temporal Landsat and Sentinel-1 data. Issue 11 (17th August 2020)

• Record Type: Journal Article
• Authors: Simões, Carolina L.; Rosa, Katia K.; Simões, Jefferson C.; Vieira, Rosemary; Costa, Rafaela M.; Silva, Aline B.
• Is Part Of: Geocarto international. Volume 35:Issue 11(2020)
• Page Start: 1233
• Page End: 1244
• Publication Date: 2020-08-17
• Subjects: West Antarctic Peninsula -- ice front retreat -- climate change -- tidewater calving glaciers; Remote sensing -- Periodicals; Geographic information systems -- Periodicals; Geology -- Periodicals; Cartography -- Periodicals; 621.3678
• DOI: 10.1080/10106049.2019.1576776
• Languages: English
• ISSNs: 1010-6049

Abstract

Abstract: This work investigates the dynamics of the ice front retreat of two tidewater glaciers in adjacent valleys, Drummond and Widdowson (66°43'S, 65°46'W), on the western coast of the Antarctic Peninsula over the past six decades. The Widdowson Glacier had a more significant area loss (36.37 km 2 or 16.97%) and a higher snow line elevation (200 m above sea level (a.s.l.) in 2016) than the Drummond Glacier (19.11 km 2, or 4.33%; snow line at 100 m a.s.l. in 2016). This difference in the retreat of the two glaciers is attributed slopes and accumulation areas values. The glacier with a smaller area, Widdowson, has been shown to be more sensitive to environmental changes Their steeper glacier front may have influenced the calving rate and generated a more efficient basal slip, increasing the ice flow rate and consequently increasing the retreat rate.