Increased rate of acceleration on Pine Island Glacier strongly coupled to changes in gravitational driving stress
Pine Island Glacier, Antarctica, has been undergoing several related changes for at least two decades; these include acceleration, thinning and grounding line retreat. During the first major ground-based study between 2006 and 2008, GPS receivers were used to monitor ice flow from 55 km to 171 km in...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:07f325e9c6614d25906f9eca220c2fb7 2023-05-15T13:38:15+02:00 Increased rate of acceleration on Pine Island Glacier strongly coupled to changes in gravitational driving stress J. B. T. Scott G. H. Gudmundsson A. M. Smith R. G. Bingham H. D. Pritchard D. G. Vaughan 2009-05-01 http://www.the-cryosphere.net/3/125/2009/tc-3-125-2009.pdf https://doaj.org/article/07f325e9c6614d25906f9eca220c2fb7 en eng Copernicus Publications 1994-0416 1994-0424 http://www.the-cryosphere.net/3/125/2009/tc-3-125-2009.pdf https://doaj.org/article/07f325e9c6614d25906f9eca220c2fb7 undefined The Cryosphere, Vol 3, Iss 1, Pp 125-131 (2009) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2009 fttriple 2023-01-22T18:14:17Z Pine Island Glacier, Antarctica, has been undergoing several related changes for at least two decades; these include acceleration, thinning and grounding line retreat. During the first major ground-based study between 2006 and 2008, GPS receivers were used to monitor ice flow from 55 km to 171 km inland, along the central flowline. At four sites both acceleration and thinning rates over the last two years exceeded rates observed at any other time over the last two decades. At the downstream site acceleration was 6.4% over 2007 and thinning was 3.5±0.5 ma−1. Acceleration and thinning have spread rapidly inland with the acceleration 171 km inland at 4.1% over 2007, greater than any measured annual flow increase along the whole glacier prior to 2006. Increases in surface slope, and hence gravitational driving stress, correlate well with the acceleration and no sustained change in longitudinal stress gradient is needed to explain the force balance. There is no indication that the glacier is approaching a new steady state. Article in Journal/Newspaper Antarc* Antarctica Pine Island Pine Island Glacier The Cryosphere Unknown Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
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Open Polar |
collection |
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op_collection_id |
fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir J. B. T. Scott G. H. Gudmundsson A. M. Smith R. G. Bingham H. D. Pritchard D. G. Vaughan Increased rate of acceleration on Pine Island Glacier strongly coupled to changes in gravitational driving stress |
topic_facet |
geo envir |
description |
Pine Island Glacier, Antarctica, has been undergoing several related changes for at least two decades; these include acceleration, thinning and grounding line retreat. During the first major ground-based study between 2006 and 2008, GPS receivers were used to monitor ice flow from 55 km to 171 km inland, along the central flowline. At four sites both acceleration and thinning rates over the last two years exceeded rates observed at any other time over the last two decades. At the downstream site acceleration was 6.4% over 2007 and thinning was 3.5±0.5 ma−1. Acceleration and thinning have spread rapidly inland with the acceleration 171 km inland at 4.1% over 2007, greater than any measured annual flow increase along the whole glacier prior to 2006. Increases in surface slope, and hence gravitational driving stress, correlate well with the acceleration and no sustained change in longitudinal stress gradient is needed to explain the force balance. There is no indication that the glacier is approaching a new steady state. |
format |
Article in Journal/Newspaper |
author |
J. B. T. Scott G. H. Gudmundsson A. M. Smith R. G. Bingham H. D. Pritchard D. G. Vaughan |
author_facet |
J. B. T. Scott G. H. Gudmundsson A. M. Smith R. G. Bingham H. D. Pritchard D. G. Vaughan |
author_sort |
J. B. T. Scott |
title |
Increased rate of acceleration on Pine Island Glacier strongly coupled to changes in gravitational driving stress |
title_short |
Increased rate of acceleration on Pine Island Glacier strongly coupled to changes in gravitational driving stress |
title_full |
Increased rate of acceleration on Pine Island Glacier strongly coupled to changes in gravitational driving stress |
title_fullStr |
Increased rate of acceleration on Pine Island Glacier strongly coupled to changes in gravitational driving stress |
title_full_unstemmed |
Increased rate of acceleration on Pine Island Glacier strongly coupled to changes in gravitational driving stress |
title_sort |
increased rate of acceleration on pine island glacier strongly coupled to changes in gravitational driving stress |
publisher |
Copernicus Publications |
publishDate |
2009 |
url |
http://www.the-cryosphere.net/3/125/2009/tc-3-125-2009.pdf https://doaj.org/article/07f325e9c6614d25906f9eca220c2fb7 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Pine Island Glacier |
geographic_facet |
Pine Island Glacier |
genre |
Antarc* Antarctica Pine Island Pine Island Glacier The Cryosphere |
genre_facet |
Antarc* Antarctica Pine Island Pine Island Glacier The Cryosphere |
op_source |
The Cryosphere, Vol 3, Iss 1, Pp 125-131 (2009) |
op_relation |
1994-0416 1994-0424 http://www.the-cryosphere.net/3/125/2009/tc-3-125-2009.pdf https://doaj.org/article/07f325e9c6614d25906f9eca220c2fb7 |
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undefined |
_version_ |
1766103165828071424 |