Sensitivity of Pine Island Glacier to observed ocean forcing
We present subannual observations (2009–2014) of a major West Antarctic glacier (Pine Island Glacier) and the neighboring ocean. Ongoing glacier retreat and accelerated ice flow were likely triggered a few decades ago by increased ocean-induced thinning, which may have initiated marine ice sheet ins...
Published in: | Geophysical Research Letters |
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:61655 2023-05-15T14:07:47+02:00 Sensitivity of Pine Island Glacier to observed ocean forcing Christianson, Knut Bushuk, Mitchell Dutrieux, Pierre Parizek, Byron R. Joughin, Ian R. Alley, Richard B. Shean, David E. Abrahamsen, E. Povl Anandakrishnan, Sridhar Heywood, Karen J. Kim, Tae-Wan Lee, Sang Hoon Nicholls, Keith Stanton, Tim Truffer, Martin Webber, Benjamin G. M. Jenkins, Adrian Jacobs, Stan Bindschadler, Robert Holland, David M. 2016-10-28 application/pdf https://ueaeprints.uea.ac.uk/id/eprint/61655/ https://ueaeprints.uea.ac.uk/id/eprint/61655/1/Published_manuscript.pdf https://doi.org/10.1002/2016GL070500 en eng https://ueaeprints.uea.ac.uk/id/eprint/61655/1/Published_manuscript.pdf Christianson, Knut, Bushuk, Mitchell, Dutrieux, Pierre, Parizek, Byron R., Joughin, Ian R., Alley, Richard B., Shean, David E., Abrahamsen, E. Povl, Anandakrishnan, Sridhar, Heywood, Karen J., Kim, Tae-Wan, Lee, Sang Hoon, Nicholls, Keith, Stanton, Tim, Truffer, Martin, Webber, Benjamin G. M., Jenkins, Adrian, Jacobs, Stan, Bindschadler, Robert and Holland, David M. (2016) Sensitivity of Pine Island Glacier to observed ocean forcing. Geophysical Research Letters, 43 (20). pp. 10817-10825. ISSN 0094-8276 doi:10.1002/2016GL070500 Article PeerReviewed 2016 ftuniveastangl https://doi.org/10.1002/2016GL070500 2023-03-23T23:32:16Z We present subannual observations (2009–2014) of a major West Antarctic glacier (Pine Island Glacier) and the neighboring ocean. Ongoing glacier retreat and accelerated ice flow were likely triggered a few decades ago by increased ocean-induced thinning, which may have initiated marine ice sheet instability. Following a subsequent 60% drop in ocean heat content from early 2012 to late 2013, ice flow slowed, but by < 4%, with flow recovering as the ocean warmed to prior temperatures. During this cold-ocean period, the evolving glacier-bed/ice shelf system was also in a geometry favorable to stabilization. However, despite a minor, temporary decrease in ice discharge, the basin-wide thinning signal did not change. Thus, as predicted by theory, once marine ice sheet instability is underway, a single transient high-amplitude ocean cooling has only a relatively minor effect on ice flow. The long-term effects of ocean temperature variability on ice flow, however, are not yet known. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Ice Shelf Pine Island Glacier University of East Anglia: UEA Digital Repository Antarctic Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) Geophysical Research Letters 43 20 10,817 10,825 |
institution |
Open Polar |
collection |
University of East Anglia: UEA Digital Repository |
op_collection_id |
ftuniveastangl |
language |
English |
description |
We present subannual observations (2009–2014) of a major West Antarctic glacier (Pine Island Glacier) and the neighboring ocean. Ongoing glacier retreat and accelerated ice flow were likely triggered a few decades ago by increased ocean-induced thinning, which may have initiated marine ice sheet instability. Following a subsequent 60% drop in ocean heat content from early 2012 to late 2013, ice flow slowed, but by < 4%, with flow recovering as the ocean warmed to prior temperatures. During this cold-ocean period, the evolving glacier-bed/ice shelf system was also in a geometry favorable to stabilization. However, despite a minor, temporary decrease in ice discharge, the basin-wide thinning signal did not change. Thus, as predicted by theory, once marine ice sheet instability is underway, a single transient high-amplitude ocean cooling has only a relatively minor effect on ice flow. The long-term effects of ocean temperature variability on ice flow, however, are not yet known. |
format |
Article in Journal/Newspaper |
author |
Christianson, Knut Bushuk, Mitchell Dutrieux, Pierre Parizek, Byron R. Joughin, Ian R. Alley, Richard B. Shean, David E. Abrahamsen, E. Povl Anandakrishnan, Sridhar Heywood, Karen J. Kim, Tae-Wan Lee, Sang Hoon Nicholls, Keith Stanton, Tim Truffer, Martin Webber, Benjamin G. M. Jenkins, Adrian Jacobs, Stan Bindschadler, Robert Holland, David M. |
spellingShingle |
Christianson, Knut Bushuk, Mitchell Dutrieux, Pierre Parizek, Byron R. Joughin, Ian R. Alley, Richard B. Shean, David E. Abrahamsen, E. Povl Anandakrishnan, Sridhar Heywood, Karen J. Kim, Tae-Wan Lee, Sang Hoon Nicholls, Keith Stanton, Tim Truffer, Martin Webber, Benjamin G. M. Jenkins, Adrian Jacobs, Stan Bindschadler, Robert Holland, David M. Sensitivity of Pine Island Glacier to observed ocean forcing |
author_facet |
Christianson, Knut Bushuk, Mitchell Dutrieux, Pierre Parizek, Byron R. Joughin, Ian R. Alley, Richard B. Shean, David E. Abrahamsen, E. Povl Anandakrishnan, Sridhar Heywood, Karen J. Kim, Tae-Wan Lee, Sang Hoon Nicholls, Keith Stanton, Tim Truffer, Martin Webber, Benjamin G. M. Jenkins, Adrian Jacobs, Stan Bindschadler, Robert Holland, David M. |
author_sort |
Christianson, Knut |
title |
Sensitivity of Pine Island Glacier to observed ocean forcing |
title_short |
Sensitivity of Pine Island Glacier to observed ocean forcing |
title_full |
Sensitivity of Pine Island Glacier to observed ocean forcing |
title_fullStr |
Sensitivity of Pine Island Glacier to observed ocean forcing |
title_full_unstemmed |
Sensitivity of Pine Island Glacier to observed ocean forcing |
title_sort |
sensitivity of pine island glacier to observed ocean forcing |
publishDate |
2016 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/61655/ https://ueaeprints.uea.ac.uk/id/eprint/61655/1/Published_manuscript.pdf https://doi.org/10.1002/2016GL070500 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Antarctic Pine Island Glacier |
geographic_facet |
Antarctic Pine Island Glacier |
genre |
Antarc* Antarctic Ice Sheet Ice Shelf Pine Island Glacier |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Shelf Pine Island Glacier |
op_relation |
https://ueaeprints.uea.ac.uk/id/eprint/61655/1/Published_manuscript.pdf Christianson, Knut, Bushuk, Mitchell, Dutrieux, Pierre, Parizek, Byron R., Joughin, Ian R., Alley, Richard B., Shean, David E., Abrahamsen, E. Povl, Anandakrishnan, Sridhar, Heywood, Karen J., Kim, Tae-Wan, Lee, Sang Hoon, Nicholls, Keith, Stanton, Tim, Truffer, Martin, Webber, Benjamin G. M., Jenkins, Adrian, Jacobs, Stan, Bindschadler, Robert and Holland, David M. (2016) Sensitivity of Pine Island Glacier to observed ocean forcing. Geophysical Research Letters, 43 (20). pp. 10817-10825. ISSN 0094-8276 doi:10.1002/2016GL070500 |
op_doi |
https://doi.org/10.1002/2016GL070500 |
container_title |
Geophysical Research Letters |
container_volume |
43 |
container_issue |
20 |
container_start_page |
10,817 |
op_container_end_page |
10,825 |
_version_ |
1766279807574736896 |