Brief communication: Thwaites Glacier cavity evolution

Author:

Bevan Suzanne L.ORCID,Luckman Adrian J.ORCID,Benn Douglas I.,Adusumilli Susheel,Crawford AnnaORCID

Abstract

Abstract. Between 2014 and 2017, ocean melt eroded a large cavity beneath and along the western margin of the fast-flowing core of Thwaites Glacier. Here we show that from 2017 to the end of 2020 the cavity persisted but did not expand. This behaviour, of melt concentrated at the grounding line within confined sub-shelf cavities, fits with prior observations and modelling studies. We also show that acceleration and thinning of Thwaites Glacier grounded ice continued, with an increase in speed of 400 m a−1 and a thinning rate of at least 1.5 m a−1, between 2012 and 2020.

Funder

Natural Environment Research Council

Publisher

Copernicus GmbH

Subject

Earth-Surface Processes,Water Science and Technology

Reference30 articles.

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2. Bevan, S., Luckman, A., and Benn, D.: Thwaites Glacier ice surface elevation profiles from June 2011 to November 2020, BAS [data set], https://doi.org/10.5285/EDE3520B-CF1C-4979-AFCC-94AC266BB61A, 2021a. a

3. Bevan, S., Luckman, A., and Benn, D.: Thwaites Glacier time series of surface elevations at (107.09 W, 75.48 S) from January 2012 to November 2020, BAS, https://doi.org/10.5285/21B3D4FA-0EDF-4B05-B762-B4633616B0BC, 2021b. a

4. Bevan, S., Luckman, A., and Benn, D.: Thwaites Glacier time series ice surface flow speeds at (107.09 W, 75.48 S) from January 2012 to December 2020, BAS, https://doi.org/10.5285/C0C1050A-2360-4464-9B0F-C2C101E5D1C2, 2021c. a

5. Bevan, S., Luckman, A., and Benn, D.: Thwaites Glacier ice surface elevation change, December 2013 to July 2017, and July 2017 to November 2020, BAS, https://doi.org/10.5285/DF8C4AC0-1723-43AE-AD48-D02D58699F32, 2021d. a

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