Recent changes in two outlet glaciers in the Antarctic Peninsula using multi-temporal Landsat and Sentinel-1 data

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...

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Bibliographic Details
Published in:Geocarto International
Main Authors: Carolina L. Simões, Katia K. Rosa, Jefferson C. Simões, Rosemary Vieira, Rafaela M. Costa, Aline B. Silva
Format: Article in Journal/Newspaper
Language:English
Published: Taylor & Francis Group 2020
Subjects:
west antarctic peninsula
ice front retreat
climate change
tidewater calving glaciers
Physical geography
GB3-5030
Antarctic
Antarctic Peninsula
Drummond Glacier
The Antarctic
Widdowson Glacier
Antarc*
Tidewater
Online Access:https://doi.org/10.1080/10106049.2019.1576776
https://doaj.org/article/668761b6932244eba9ab77b09a7a2c8a
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Summary: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 km2 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 km2, 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.

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