Surge development in the western sector of the Vavilov Ice Cap, Severnaya Zemlya, 1963–2017
The glaciers and ice caps in the Arctic are experiencing noticeable changes which are manifested, in particular, in the intensification of their dynamic instability. In this paper we present data on a largescale surge in the Western basin of the Vavilov ice dome on the archipelago Severnaya Zemlya,...
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ftdoajarticles:oai:doaj.org/article:64628e10abe0475f94344a249537b880 2023-05-15T15:18:35+02:00 Surge development in the western sector of the Vavilov Ice Cap, Severnaya Zemlya, 1963–2017 I. S. Bushueva A. F. Glazovsky G. A. Nosenko 2018-09-01T00:00:00Z https://doi.org/10.15356/2076-6734-2018-3-293-306 https://doaj.org/article/64628e10abe0475f94344a249537b880 RU rus Nauka https://ice-snow.igras.ru/jour/article/view/481 https://doaj.org/toc/2076-6734 https://doaj.org/toc/2412-3765 2076-6734 2412-3765 doi:10.15356/2076-6734-2018-3-293-306 https://doaj.org/article/64628e10abe0475f94344a249537b880 Лëд и снег, Vol 58, Iss 3, Pp 293-306 (2018) арктика ледниковый купол подвижка ледника северная земля скорости льда Science Q article 2018 ftdoajarticles https://doi.org/10.15356/2076-6734-2018-3-293-306 2023-03-19T01:40:11Z The glaciers and ice caps in the Arctic are experiencing noticeable changes which are manifested, in particular, in the intensification of their dynamic instability. In this paper we present data on a largescale surge in the Western basin of the Vavilov ice dome on the archipelago Severnaya Zemlya, derived from satellite images and supplemented by airborne RES-2014 and available publications. Analysis of 28 space images of 1963–2017 demonstrated that the surge developed over the whole period. In the fi st decade (1963–1973), the advance was very slow – from 2–5 to 12 m/year. Since the 1980-ies, the ice movement began to accelerate from tens to a hundred of meters per a year in the 2000-ies. The sudden change happened in the year 2012 when the surge front began to move already at speeds of about 0.5 km/year. In 2015, the volume of advanced part reached almost 4 km3. Maximal speed 9.2 km/year was recorded in 2016. From 1963 to 2017, the edge of the glacier advanced by 11.7 km, and its area increased by 134.1 km2 (by 47% relative to the basin area of 1963), that caused spreading of crevasse zone up the glacier. Surface speeds reached a maximum of 25.4 m/day in 2016 and decreased to 7.6 m/day in 2017. The authors suggest that the initial activation of the southern and western edges of the ice dome could be a reaction to the climate signal, possibly occurred several centuries ago. The ice crevassing and cryo-hydrological warming of ice, enhanced by positive feedback, resulted in instability of the glacier and the displacement of the edge of the ice belt containing moraine and frozen to the bed, which transformed into a catastrophic movement. The surge was facilitated by change of bedrock conditions as the ice lobe progressed offshore from permafrost coastal zone to the area of loose marine bottom sediments with low shear strength. The surge seems to be also stimulated by anomalously warm summer of 2012. Article in Journal/Newspaper Arctic Ice Ice cap permafrost Severnaya Zemlya Арктика Directory of Open Access Journals: DOAJ Articles Arctic Western Basin Severnaya Zemlya ENVELOPE(98.000,98.000,79.500,79.500) Ice and Snow 58 3 293 306 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Russian |
topic |
арктика ледниковый купол подвижка ледника северная земля скорости льда Science Q |
spellingShingle |
арктика ледниковый купол подвижка ледника северная земля скорости льда Science Q I. S. Bushueva A. F. Glazovsky G. A. Nosenko Surge development in the western sector of the Vavilov Ice Cap, Severnaya Zemlya, 1963–2017 |
topic_facet |
арктика ледниковый купол подвижка ледника северная земля скорости льда Science Q |
description |
The glaciers and ice caps in the Arctic are experiencing noticeable changes which are manifested, in particular, in the intensification of their dynamic instability. In this paper we present data on a largescale surge in the Western basin of the Vavilov ice dome on the archipelago Severnaya Zemlya, derived from satellite images and supplemented by airborne RES-2014 and available publications. Analysis of 28 space images of 1963–2017 demonstrated that the surge developed over the whole period. In the fi st decade (1963–1973), the advance was very slow – from 2–5 to 12 m/year. Since the 1980-ies, the ice movement began to accelerate from tens to a hundred of meters per a year in the 2000-ies. The sudden change happened in the year 2012 when the surge front began to move already at speeds of about 0.5 km/year. In 2015, the volume of advanced part reached almost 4 km3. Maximal speed 9.2 km/year was recorded in 2016. From 1963 to 2017, the edge of the glacier advanced by 11.7 km, and its area increased by 134.1 km2 (by 47% relative to the basin area of 1963), that caused spreading of crevasse zone up the glacier. Surface speeds reached a maximum of 25.4 m/day in 2016 and decreased to 7.6 m/day in 2017. The authors suggest that the initial activation of the southern and western edges of the ice dome could be a reaction to the climate signal, possibly occurred several centuries ago. The ice crevassing and cryo-hydrological warming of ice, enhanced by positive feedback, resulted in instability of the glacier and the displacement of the edge of the ice belt containing moraine and frozen to the bed, which transformed into a catastrophic movement. The surge was facilitated by change of bedrock conditions as the ice lobe progressed offshore from permafrost coastal zone to the area of loose marine bottom sediments with low shear strength. The surge seems to be also stimulated by anomalously warm summer of 2012. |
format |
Article in Journal/Newspaper |
author |
I. S. Bushueva A. F. Glazovsky G. A. Nosenko |
author_facet |
I. S. Bushueva A. F. Glazovsky G. A. Nosenko |
author_sort |
I. S. Bushueva |
title |
Surge development in the western sector of the Vavilov Ice Cap, Severnaya Zemlya, 1963–2017 |
title_short |
Surge development in the western sector of the Vavilov Ice Cap, Severnaya Zemlya, 1963–2017 |
title_full |
Surge development in the western sector of the Vavilov Ice Cap, Severnaya Zemlya, 1963–2017 |
title_fullStr |
Surge development in the western sector of the Vavilov Ice Cap, Severnaya Zemlya, 1963–2017 |
title_full_unstemmed |
Surge development in the western sector of the Vavilov Ice Cap, Severnaya Zemlya, 1963–2017 |
title_sort |
surge development in the western sector of the vavilov ice cap, severnaya zemlya, 1963–2017 |
publisher |
Nauka |
publishDate |
2018 |
url |
https://doi.org/10.15356/2076-6734-2018-3-293-306 https://doaj.org/article/64628e10abe0475f94344a249537b880 |
long_lat |
ENVELOPE(98.000,98.000,79.500,79.500) |
geographic |
Arctic Western Basin Severnaya Zemlya |
geographic_facet |
Arctic Western Basin Severnaya Zemlya |
genre |
Arctic Ice Ice cap permafrost Severnaya Zemlya Арктика |
genre_facet |
Arctic Ice Ice cap permafrost Severnaya Zemlya Арктика |
op_source |
Лëд и снег, Vol 58, Iss 3, Pp 293-306 (2018) |
op_relation |
https://ice-snow.igras.ru/jour/article/view/481 https://doaj.org/toc/2076-6734 https://doaj.org/toc/2412-3765 2076-6734 2412-3765 doi:10.15356/2076-6734-2018-3-293-306 https://doaj.org/article/64628e10abe0475f94344a249537b880 |
op_doi |
https://doi.org/10.15356/2076-6734-2018-3-293-306 |
container_title |
Ice and Snow |
container_volume |
58 |
container_issue |
3 |
container_start_page |
293 |
op_container_end_page |
306 |
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1766348776765652992 |