Ice streaming in the Laurentide ice sheet : a first comparison between data-calibrated numerical model output and geological evidence.
[1] Despite the importance of rapidly-flowing ice streams to ice sheet mass balance, their incorporation into numerical ice sheet models is a major scientific challenge. This introduces large uncertainties in model output and inhibits a more complete understanding of the role of ice streams in overa...
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:12315 2023-05-15T16:39:40+02:00 Ice streaming in the Laurentide ice sheet : a first comparison between data-calibrated numerical model output and geological evidence. Stokes, C.R. Tarasov, L. 2010-01-01 application/pdf http://dro.dur.ac.uk/12315/ http://dro.dur.ac.uk/12315/1/12315.pdf https://doi.org/10.1029/2009GL040990 unknown American Geophysical Union dro:12315 issn:0094-8276 doi:10.1029/2009GL040990 http://dro.dur.ac.uk/12315/ http://dx.doi.org/10.1029/2009GL040990 http://dro.dur.ac.uk/12315/1/12315.pdf © 2010 by the American Geophysical Union. Stokes, C. R. and L. Tarasov (2010), Ice streaming in the Laurentide Ice Sheet: A first comparison between data-calibrated numerical model output and geological evidence, Geophysical Research Letters, 37, 1, L01501, 10.1029/2009GL040990. To view the published open abstract, go to http://dx.doi.org/10.1029/2009GL040990. Geophysical research letters, 2010, Vol.37(1), pp.L01501 [Peer Reviewed Journal] Dynamics Ice sheets Ice streams Article PeerReviewed 2010 ftunivdurham https://doi.org/10.1029/2009GL040990 2020-05-28T22:30:36Z [1] Despite the importance of rapidly-flowing ice streams to ice sheet mass balance, their incorporation into numerical ice sheet models is a major scientific challenge. This introduces large uncertainties in model output and inhibits a more complete understanding of the role of ice streams in overall ice sheet stability. Recent computational advances have enabled more realistic representations of ice streaming but few studies have attempted to compare model output against known locations of ice streams. This paper compares predictions of ice streaming derived from a large ensemble analysis of a Glacial Systems Model of the Laurentide Ice Sheet against independent geological evidence compiled from previously published studies. Although the precise dating of paleo-ice stream locations is problematic, our analysis includes comparisons at six different time-steps (18 to 10 cal ka BP) during deglaciation. Results indicate that the model is successful in predicting all of the major marine-terminating ice streams but there is mixed success in simulating terrestrial ice streams in the right place and at the right time, which is vital in guiding future model development. The model also reveals that whilst some ice streams persist throughout deglaciation the focus of mass loss associated with ice streaming switches through time with dynamic changes in ice stream catchments and tributaries. This implies that major changes in ice stream activity are to be expected in a deglaciating ice sheet, with important implications for contemporary ice sheet dynamics. Article in Journal/Newspaper Ice Sheet Durham University: Durham Research Online Geophysical Research Letters 37 1 n/a n/a |
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Open Polar |
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Durham University: Durham Research Online |
op_collection_id |
ftunivdurham |
language |
unknown |
topic |
Dynamics Ice sheets Ice streams |
spellingShingle |
Dynamics Ice sheets Ice streams Stokes, C.R. Tarasov, L. Ice streaming in the Laurentide ice sheet : a first comparison between data-calibrated numerical model output and geological evidence. |
topic_facet |
Dynamics Ice sheets Ice streams |
description |
[1] Despite the importance of rapidly-flowing ice streams to ice sheet mass balance, their incorporation into numerical ice sheet models is a major scientific challenge. This introduces large uncertainties in model output and inhibits a more complete understanding of the role of ice streams in overall ice sheet stability. Recent computational advances have enabled more realistic representations of ice streaming but few studies have attempted to compare model output against known locations of ice streams. This paper compares predictions of ice streaming derived from a large ensemble analysis of a Glacial Systems Model of the Laurentide Ice Sheet against independent geological evidence compiled from previously published studies. Although the precise dating of paleo-ice stream locations is problematic, our analysis includes comparisons at six different time-steps (18 to 10 cal ka BP) during deglaciation. Results indicate that the model is successful in predicting all of the major marine-terminating ice streams but there is mixed success in simulating terrestrial ice streams in the right place and at the right time, which is vital in guiding future model development. The model also reveals that whilst some ice streams persist throughout deglaciation the focus of mass loss associated with ice streaming switches through time with dynamic changes in ice stream catchments and tributaries. This implies that major changes in ice stream activity are to be expected in a deglaciating ice sheet, with important implications for contemporary ice sheet dynamics. |
format |
Article in Journal/Newspaper |
author |
Stokes, C.R. Tarasov, L. |
author_facet |
Stokes, C.R. Tarasov, L. |
author_sort |
Stokes, C.R. |
title |
Ice streaming in the Laurentide ice sheet : a first comparison between data-calibrated numerical model output and geological evidence. |
title_short |
Ice streaming in the Laurentide ice sheet : a first comparison between data-calibrated numerical model output and geological evidence. |
title_full |
Ice streaming in the Laurentide ice sheet : a first comparison between data-calibrated numerical model output and geological evidence. |
title_fullStr |
Ice streaming in the Laurentide ice sheet : a first comparison between data-calibrated numerical model output and geological evidence. |
title_full_unstemmed |
Ice streaming in the Laurentide ice sheet : a first comparison between data-calibrated numerical model output and geological evidence. |
title_sort |
ice streaming in the laurentide ice sheet : a first comparison between data-calibrated numerical model output and geological evidence. |
publisher |
American Geophysical Union |
publishDate |
2010 |
url |
http://dro.dur.ac.uk/12315/ http://dro.dur.ac.uk/12315/1/12315.pdf https://doi.org/10.1029/2009GL040990 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Geophysical research letters, 2010, Vol.37(1), pp.L01501 [Peer Reviewed Journal] |
op_relation |
dro:12315 issn:0094-8276 doi:10.1029/2009GL040990 http://dro.dur.ac.uk/12315/ http://dx.doi.org/10.1029/2009GL040990 http://dro.dur.ac.uk/12315/1/12315.pdf |
op_rights |
© 2010 by the American Geophysical Union. Stokes, C. R. and L. Tarasov (2010), Ice streaming in the Laurentide Ice Sheet: A first comparison between data-calibrated numerical model output and geological evidence, Geophysical Research Letters, 37, 1, L01501, 10.1029/2009GL040990. To view the published open abstract, go to http://dx.doi.org/10.1029/2009GL040990. |
op_doi |
https://doi.org/10.1029/2009GL040990 |
container_title |
Geophysical Research Letters |
container_volume |
37 |
container_issue |
1 |
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n/a |
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1766029993884778496 |