Marginal fluctuations of a Svalbard surge-type tidewater glacier, Bloomstrandbreen, since the little ice age: a record of three surges
Previous advances and retreats of Blomstrandbreen within the cold period known as the Little Ice Age, between approximately 1400 and 1920, are relatively well documented. The seafloor characteristics associated with these glacier fluctuations, and their importance for the identification of similar s...
Published in: | Arctic, Antarctic, and Alpine Research |
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Language: | English |
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Institute of Arctic and Alpine Research
2016
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Online Access: | http://nora.nerc.ac.uk/id/eprint/509246/ https://nora.nerc.ac.uk/id/eprint/509246/1/Burton.pdf https://nora.nerc.ac.uk/id/eprint/509246/7/Hogan.pdf |
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ftnerc:oai:nora.nerc.ac.uk:509246 2023-05-15T14:14:41+02:00 Marginal fluctuations of a Svalbard surge-type tidewater glacier, Bloomstrandbreen, since the little ice age: a record of three surges Burton, David J. Dowdeswell, Julian A. Hogan, Kelly A. Noormets, Riko 2016-05 text http://nora.nerc.ac.uk/id/eprint/509246/ https://nora.nerc.ac.uk/id/eprint/509246/1/Burton.pdf https://nora.nerc.ac.uk/id/eprint/509246/7/Hogan.pdf en eng Institute of Arctic and Alpine Research https://nora.nerc.ac.uk/id/eprint/509246/1/Burton.pdf https://nora.nerc.ac.uk/id/eprint/509246/7/Hogan.pdf Burton, David J.; Dowdeswell, Julian A.; Hogan, Kelly A. orcid:0000-0002-1256-8010 Noormets, Riko. 2016 Marginal fluctuations of a Svalbard surge-type tidewater glacier, Bloomstrandbreen, since the little ice age: a record of three surges. Arctic, Antarctic and Alpine Research, 48 (2). 411-426. https://doi.org/10.1657/AAAR0014-094 <https://doi.org/10.1657/AAAR0014-094> Publication - Article PeerReviewed 2016 ftnerc https://doi.org/10.1657/AAAR0014-094 2023-02-04T19:40:46Z Previous advances and retreats of Blomstrandbreen within the cold period known as the Little Ice Age, between approximately 1400 and 1920, are relatively well documented. The seafloor characteristics associated with these glacier fluctuations, and their importance for the identification of similar surge-type tidewater glaciers, are discussed. We use detailed multibeam-bathymetric data acquired within Nordvågen, the marine area offshore of Blomstrandbreen, to provide a new understanding of the style and pattern of deglaciation around Blomstrandhalvøya since Blomstrandbreen's neoglacial maximum. Glacial landforms on the seafloor of Nordvågen comprise overridden moraines, glacial lineations, terminal moraines, and annual recessional moraines. Crevasse-fill ridges, which are often regarded as a characteristic landform of surging tidewater glaciers, are present on only restricted areas of Nordvågen. Significantly, this study shows that large terminal surge moraines and numerous crevasse-fill ridges may not always be well developed in association with glacier surges, with implications for the identification of surges in the geological record. Using historical observations, aerial photographs, and satellite imagery of Blomstrandbreen, we have correlated former ice-marginal positions with mapped submarine landforms. Three surge events occurred during a pattern of overall retreat, with a spacing of about 50 years between active advance phases; this represents a relatively short quiescent phase for Svalbard glaciers. Average retreat rates of 10–50 m yr-1 are typical of the quiescent phase of the surge cycle, whereas surge advances vary from 200 m to over 725 m. Article in Journal/Newspaper Antarctic and Alpine Research Arctic glacier Svalbard Tidewater Natural Environment Research Council: NERC Open Research Archive Svalbard Blomstrandbreen ENVELOPE(12.167,12.167,79.033,79.033) Blomstrandhalvøya ENVELOPE(12.105,12.105,78.976,78.976) Nordvågen ENVELOPE(8.321,8.321,63.255,63.255) Arctic, Antarctic, and Alpine Research 48 2 411 426 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Previous advances and retreats of Blomstrandbreen within the cold period known as the Little Ice Age, between approximately 1400 and 1920, are relatively well documented. The seafloor characteristics associated with these glacier fluctuations, and their importance for the identification of similar surge-type tidewater glaciers, are discussed. We use detailed multibeam-bathymetric data acquired within Nordvågen, the marine area offshore of Blomstrandbreen, to provide a new understanding of the style and pattern of deglaciation around Blomstrandhalvøya since Blomstrandbreen's neoglacial maximum. Glacial landforms on the seafloor of Nordvågen comprise overridden moraines, glacial lineations, terminal moraines, and annual recessional moraines. Crevasse-fill ridges, which are often regarded as a characteristic landform of surging tidewater glaciers, are present on only restricted areas of Nordvågen. Significantly, this study shows that large terminal surge moraines and numerous crevasse-fill ridges may not always be well developed in association with glacier surges, with implications for the identification of surges in the geological record. Using historical observations, aerial photographs, and satellite imagery of Blomstrandbreen, we have correlated former ice-marginal positions with mapped submarine landforms. Three surge events occurred during a pattern of overall retreat, with a spacing of about 50 years between active advance phases; this represents a relatively short quiescent phase for Svalbard glaciers. Average retreat rates of 10–50 m yr-1 are typical of the quiescent phase of the surge cycle, whereas surge advances vary from 200 m to over 725 m. |
format |
Article in Journal/Newspaper |
author |
Burton, David J. Dowdeswell, Julian A. Hogan, Kelly A. Noormets, Riko |
spellingShingle |
Burton, David J. Dowdeswell, Julian A. Hogan, Kelly A. Noormets, Riko Marginal fluctuations of a Svalbard surge-type tidewater glacier, Bloomstrandbreen, since the little ice age: a record of three surges |
author_facet |
Burton, David J. Dowdeswell, Julian A. Hogan, Kelly A. Noormets, Riko |
author_sort |
Burton, David J. |
title |
Marginal fluctuations of a Svalbard surge-type tidewater glacier, Bloomstrandbreen, since the little ice age: a record of three surges |
title_short |
Marginal fluctuations of a Svalbard surge-type tidewater glacier, Bloomstrandbreen, since the little ice age: a record of three surges |
title_full |
Marginal fluctuations of a Svalbard surge-type tidewater glacier, Bloomstrandbreen, since the little ice age: a record of three surges |
title_fullStr |
Marginal fluctuations of a Svalbard surge-type tidewater glacier, Bloomstrandbreen, since the little ice age: a record of three surges |
title_full_unstemmed |
Marginal fluctuations of a Svalbard surge-type tidewater glacier, Bloomstrandbreen, since the little ice age: a record of three surges |
title_sort |
marginal fluctuations of a svalbard surge-type tidewater glacier, bloomstrandbreen, since the little ice age: a record of three surges |
publisher |
Institute of Arctic and Alpine Research |
publishDate |
2016 |
url |
http://nora.nerc.ac.uk/id/eprint/509246/ https://nora.nerc.ac.uk/id/eprint/509246/1/Burton.pdf https://nora.nerc.ac.uk/id/eprint/509246/7/Hogan.pdf |
long_lat |
ENVELOPE(12.167,12.167,79.033,79.033) ENVELOPE(12.105,12.105,78.976,78.976) ENVELOPE(8.321,8.321,63.255,63.255) |
geographic |
Svalbard Blomstrandbreen Blomstrandhalvøya Nordvågen |
geographic_facet |
Svalbard Blomstrandbreen Blomstrandhalvøya Nordvågen |
genre |
Antarctic and Alpine Research Arctic glacier Svalbard Tidewater |
genre_facet |
Antarctic and Alpine Research Arctic glacier Svalbard Tidewater |
op_relation |
https://nora.nerc.ac.uk/id/eprint/509246/1/Burton.pdf https://nora.nerc.ac.uk/id/eprint/509246/7/Hogan.pdf Burton, David J.; Dowdeswell, Julian A.; Hogan, Kelly A. orcid:0000-0002-1256-8010 Noormets, Riko. 2016 Marginal fluctuations of a Svalbard surge-type tidewater glacier, Bloomstrandbreen, since the little ice age: a record of three surges. Arctic, Antarctic and Alpine Research, 48 (2). 411-426. https://doi.org/10.1657/AAAR0014-094 <https://doi.org/10.1657/AAAR0014-094> |
op_doi |
https://doi.org/10.1657/AAAR0014-094 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
48 |
container_issue |
2 |
container_start_page |
411 |
op_container_end_page |
426 |
_version_ |
1766287016121597952 |