J. Rachel Carr
Exceptional retreat of Novaya Zemlya's marine-terminating outlet glaciers between 2000 and 2013
Carr, J. Rachel; Bell, Heather; Killick, Rebecca; Holt, Tom
Authors
Heather Bell
Rebecca Killick
Tom Holt
Abstract
Novaya Zemlya (NVZ) has experienced rapid ice loss and accelerated marine-terminating glacier retreat during the past 2 decades. However, it is unknown whether this retreat is exceptional longer term and/or whether it has persisted since 2010. Investigating this is vital, as dynamic thinning may contribute substantially to ice loss from NVZ, but is not currently included in sea level rise predictions. Here, we use remotely sensed data to assess controls on NVZ glacier retreat between 1973/76 and 2015. Glaciers that terminate into lakes or the ocean receded 3.5 times faster than those that terminate on land. Between 2000 and 2013, retreat rates were significantly higher on marine-terminating outlet glaciers than during the previous 27 years, and we observe widespread slowdown in retreat, and even advance, between 2013 and 2015. There were some common patterns in the timing of glacier retreat, but the magnitude varied between individual glaciers. Rapid retreat between 2000 and 2013 corresponds to a period of significantly warmer air temperatures and reduced sea ice concentrations, and to changes in the North Atlantic Oscillation (NAO) and Atlantic Multidecadal Oscillation (AMO). We need to assess the impact of this accelerated retreat on dynamic ice losses from NVZ to accurately quantify its future sea level rise contribution.
Citation
Carr, J. R., Bell, H., Killick, R., & Holt, T. (2017). Exceptional retreat of Novaya Zemlya's marine-terminating outlet glaciers between 2000 and 2013. The Cryosphere, 11(5), 2149-2174. https://doi.org/10.5194/tc-11-2149-2017
Journal Article Type | Article |
---|---|
Acceptance Date | Jul 24, 2017 |
Online Publication Date | Sep 8, 2017 |
Publication Date | Sep 8, 2017 |
Deposit Date | Oct 10, 2017 |
Publicly Available Date | Oct 10, 2017 |
Journal | Cryosphere |
Electronic ISSN | 1994-0424 |
Publisher | Copernicus Publications |
Peer Reviewed | Peer Reviewed |
Volume | 11 |
Issue | 5 |
Pages | 2149-2174 |
DOI | https://doi.org/10.5194/tc-11-2149-2017 |
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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/
Copyright Statement
© Author(s) 2017. This work is distributed under the Creative Commons Attribution 3.0 License.
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