Temporal variations in flow velocity at Finsterwalderbreen, a Svalbard surge-type glacier.
Inter- and intra-annual velocity variations are well known on alpine glaciers, but their importance for Arctic glaciers has only been recognized more recently. This paper presents flow velocity data from Finsterwalderbreen, a 35km2 polythermal surge-type glacier in southern Svalbard that is presentl...
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ftloughboroughun:oai:figshare.com:article/9483839 2023-05-15T15:08:41+02:00 Temporal variations in flow velocity at Finsterwalderbreen, a Svalbard surge-type glacier. Anne-Marie Nuttall Richard Hodgkins 2005-01-01T00:00:00Z https://figshare.com/articles/journal_contribution/Temporal_variations_in_flow_velocity_at_Finsterwalderbreen_a_Svalbard_surge-type_glacier_/9483839 unknown 2134/3571 https://figshare.com/articles/journal_contribution/Temporal_variations_in_flow_velocity_at_Finsterwalderbreen_a_Svalbard_surge-type_glacier_/9483839 CC BY-NC-ND 4.0 CC-BY-NC-ND Atmospheric Sciences Geophysics Earth Sciences not elsewhere classified untagged Text Journal contribution 2005 ftloughboroughun 2022-01-01T20:38:51Z Inter- and intra-annual velocity variations are well known on alpine glaciers, but their importance for Arctic glaciers has only been recognized more recently. This paper presents flow velocity data from Finsterwalderbreen, a 35km2 polythermal surge-type glacier in southern Svalbard that is presently ~100 years into its quiescent phase. Field measurements of glacier surface velocities are available from 1950–52 and 1994–97, and mean velocities for the last decade are estimated for the lower glacier using cables drilled to the glacier bed. These velocities show substantial seasonal variations indicating that basal sliding is an important component of surface velocities and interannual fluctuations of up to 75%, possibly indicating variations in subglacial water storage. Several lines of evidence indicate that this glacier has an extensive subglacial hydrological system, generally considered to be a prerequisite for surge-type glaciers, which is at least partly pressurized. Information on surface morphology from 1898 onwards shows that the glacier has experienced continuous retreat since the last surge in about 1910, and has now retreated ~1.5km further back than its previous pre-surge position in 1898. Tracking of moraine loops on terrestrial and aerial photographs acquired over a 100 year period indicates that the surge period of Finsterwalderbreen may be lengthening in response to climate changes. Other Non-Article Part of Journal/Newspaper Arctic glacier Svalbard Loughborough University: Figshare Arctic Finsterwalderbreen ENVELOPE(15.273,15.273,77.489,77.489) Svalbard |
institution |
Open Polar |
collection |
Loughborough University: Figshare |
op_collection_id |
ftloughboroughun |
language |
unknown |
topic |
Atmospheric Sciences Geophysics Earth Sciences not elsewhere classified untagged |
spellingShingle |
Atmospheric Sciences Geophysics Earth Sciences not elsewhere classified untagged Anne-Marie Nuttall Richard Hodgkins Temporal variations in flow velocity at Finsterwalderbreen, a Svalbard surge-type glacier. |
topic_facet |
Atmospheric Sciences Geophysics Earth Sciences not elsewhere classified untagged |
description |
Inter- and intra-annual velocity variations are well known on alpine glaciers, but their importance for Arctic glaciers has only been recognized more recently. This paper presents flow velocity data from Finsterwalderbreen, a 35km2 polythermal surge-type glacier in southern Svalbard that is presently ~100 years into its quiescent phase. Field measurements of glacier surface velocities are available from 1950–52 and 1994–97, and mean velocities for the last decade are estimated for the lower glacier using cables drilled to the glacier bed. These velocities show substantial seasonal variations indicating that basal sliding is an important component of surface velocities and interannual fluctuations of up to 75%, possibly indicating variations in subglacial water storage. Several lines of evidence indicate that this glacier has an extensive subglacial hydrological system, generally considered to be a prerequisite for surge-type glaciers, which is at least partly pressurized. Information on surface morphology from 1898 onwards shows that the glacier has experienced continuous retreat since the last surge in about 1910, and has now retreated ~1.5km further back than its previous pre-surge position in 1898. Tracking of moraine loops on terrestrial and aerial photographs acquired over a 100 year period indicates that the surge period of Finsterwalderbreen may be lengthening in response to climate changes. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Anne-Marie Nuttall Richard Hodgkins |
author_facet |
Anne-Marie Nuttall Richard Hodgkins |
author_sort |
Anne-Marie Nuttall |
title |
Temporal variations in flow velocity at Finsterwalderbreen, a Svalbard surge-type glacier. |
title_short |
Temporal variations in flow velocity at Finsterwalderbreen, a Svalbard surge-type glacier. |
title_full |
Temporal variations in flow velocity at Finsterwalderbreen, a Svalbard surge-type glacier. |
title_fullStr |
Temporal variations in flow velocity at Finsterwalderbreen, a Svalbard surge-type glacier. |
title_full_unstemmed |
Temporal variations in flow velocity at Finsterwalderbreen, a Svalbard surge-type glacier. |
title_sort |
temporal variations in flow velocity at finsterwalderbreen, a svalbard surge-type glacier. |
publishDate |
2005 |
url |
https://figshare.com/articles/journal_contribution/Temporal_variations_in_flow_velocity_at_Finsterwalderbreen_a_Svalbard_surge-type_glacier_/9483839 |
long_lat |
ENVELOPE(15.273,15.273,77.489,77.489) |
geographic |
Arctic Finsterwalderbreen Svalbard |
geographic_facet |
Arctic Finsterwalderbreen Svalbard |
genre |
Arctic glacier Svalbard |
genre_facet |
Arctic glacier Svalbard |
op_relation |
2134/3571 https://figshare.com/articles/journal_contribution/Temporal_variations_in_flow_velocity_at_Finsterwalderbreen_a_Svalbard_surge-type_glacier_/9483839 |
op_rights |
CC BY-NC-ND 4.0 |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766339988852572160 |