Journal
EARTH AND PLANETARY SCIENCE LETTERS
Volume 502, Issue -, Pages 146-155Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.epsl.2018.08.049
Keywords
glaciers; Arctic; remote sensing; glaciology
Categories
Funding
- NASA [NNX11AR14G, NNX12A031G]
- Ministry of Education, Taiwan
- NASA Earth and Space Sciences Fellowship
- NSF [1043681, 1559691, 1542736]
- UK NERC grant [GR3/9958]
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Ice caps that are mostly frozen at the bedrock-ice interface are thought to be stable and respond slowly to changes in climate. We use remote sensing to measure velocity and thickness changes that occur when the margin of the largely cold-based Vavilov Ice Cap in the Russian High Arctic advances over weak marine sediments. We show that cold-based to polythermal glacier systems with no previous history of surging may evolve with unexpected and unprecedented speed when their basal boundary conditions change, resulting in very large dynamic ice mass losses (an increase in annual mass loss by a factor of similar to 100) over a few years. We question the future long-term stability of cold and polythermal polar ice caps, many of which terminate in marine waters as the climate becomes warmer and wetter in the polar regions. (C) 2018 Elsevier B.V. All rights reserved.
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