Ice-rise stratigraphy reveals changes in surface mass balance over the last millennia in Dronning Maud Land
We use ice flow modelling to simulate the englacial stratigraphy of Blåskimen Island, an ice rise in Dronning Maud Land and elucidate the evolution of this data-sparse region. We apply a thermo-mechanically coupled Elmer/Ice model to a profile along flowlines and through the ice-rise summit, where s...
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Cambridge University Press
2018
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ftdoajarticles:oai:doaj.org/article:c85b651c05e7483d9b657e7fa5fb3bbb 2023-05-15T13:33:59+02:00 Ice-rise stratigraphy reveals changes in surface mass balance over the last millennia in Dronning Maud Land VIKRAM GOEL CARLOS MARTÍN KENICHI MATSUOKA 2018-12-01T00:00:00Z https://doi.org/10.1017/jog.2018.81 https://doaj.org/article/c85b651c05e7483d9b657e7fa5fb3bbb EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143018000813/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2018.81 0022-1430 1727-5652 https://doaj.org/article/c85b651c05e7483d9b657e7fa5fb3bbb Journal of Glaciology, Vol 64, Pp 932-942 (2018) Antarctic glaciology ice rise ice-sheet modelling surface mass budget Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2018 ftdoajarticles https://doi.org/10.1017/jog.2018.81 2023-03-12T01:30:59Z We use ice flow modelling to simulate the englacial stratigraphy of Blåskimen Island, an ice rise in Dronning Maud Land and elucidate the evolution of this data-sparse region. We apply a thermo-mechanically coupled Elmer/Ice model to a profile along flowlines and through the ice-rise summit, where surface mass balance (SMB), flow velocity and ice stratigraphy were recently measured. We conclude that: (i) the ice rise is presently thickening at a rate of 0.5~0.6 m ice equivalent per year (mieq a−1), which is twice an earlier estimate using the field data and the input–output method; (ii) present thickening started 20–40 years in the past, before which the ice rise was in a steady state; (iii) SMB contrast between the upwind and downwind slopes was stronger than the present value by ~23% (or 0.15 mieq a−1) prior to ~1100 years ago. Since then, this contrast has been decreasing overall. We surmise that these SMB changes are likely a result of synoptic-scale atmospheric changes, rather than local atmospheric changes controlled by local ice topography. Our technique effectively assimilates geophysical data, avoiding the complexity of ice flow beneath the ice divide. Thus, it could be applied to other ice rises to elucidate the recent glacial retreat. Article in Journal/Newspaper Antarc* Antarctic Blåskimen Island Dronning Maud Land Ice Sheet Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Antarctic Dronning Maud Land Blåskimen ENVELOPE(-3.000,-3.000,-70.500,-70.500) Journal of Glaciology 64 248 932 942 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic glaciology ice rise ice-sheet modelling surface mass budget Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Antarctic glaciology ice rise ice-sheet modelling surface mass budget Environmental sciences GE1-350 Meteorology. Climatology QC851-999 VIKRAM GOEL CARLOS MARTÍN KENICHI MATSUOKA Ice-rise stratigraphy reveals changes in surface mass balance over the last millennia in Dronning Maud Land |
topic_facet |
Antarctic glaciology ice rise ice-sheet modelling surface mass budget Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
We use ice flow modelling to simulate the englacial stratigraphy of Blåskimen Island, an ice rise in Dronning Maud Land and elucidate the evolution of this data-sparse region. We apply a thermo-mechanically coupled Elmer/Ice model to a profile along flowlines and through the ice-rise summit, where surface mass balance (SMB), flow velocity and ice stratigraphy were recently measured. We conclude that: (i) the ice rise is presently thickening at a rate of 0.5~0.6 m ice equivalent per year (mieq a−1), which is twice an earlier estimate using the field data and the input–output method; (ii) present thickening started 20–40 years in the past, before which the ice rise was in a steady state; (iii) SMB contrast between the upwind and downwind slopes was stronger than the present value by ~23% (or 0.15 mieq a−1) prior to ~1100 years ago. Since then, this contrast has been decreasing overall. We surmise that these SMB changes are likely a result of synoptic-scale atmospheric changes, rather than local atmospheric changes controlled by local ice topography. Our technique effectively assimilates geophysical data, avoiding the complexity of ice flow beneath the ice divide. Thus, it could be applied to other ice rises to elucidate the recent glacial retreat. |
format |
Article in Journal/Newspaper |
author |
VIKRAM GOEL CARLOS MARTÍN KENICHI MATSUOKA |
author_facet |
VIKRAM GOEL CARLOS MARTÍN KENICHI MATSUOKA |
author_sort |
VIKRAM GOEL |
title |
Ice-rise stratigraphy reveals changes in surface mass balance over the last millennia in Dronning Maud Land |
title_short |
Ice-rise stratigraphy reveals changes in surface mass balance over the last millennia in Dronning Maud Land |
title_full |
Ice-rise stratigraphy reveals changes in surface mass balance over the last millennia in Dronning Maud Land |
title_fullStr |
Ice-rise stratigraphy reveals changes in surface mass balance over the last millennia in Dronning Maud Land |
title_full_unstemmed |
Ice-rise stratigraphy reveals changes in surface mass balance over the last millennia in Dronning Maud Land |
title_sort |
ice-rise stratigraphy reveals changes in surface mass balance over the last millennia in dronning maud land |
publisher |
Cambridge University Press |
publishDate |
2018 |
url |
https://doi.org/10.1017/jog.2018.81 https://doaj.org/article/c85b651c05e7483d9b657e7fa5fb3bbb |
long_lat |
ENVELOPE(-3.000,-3.000,-70.500,-70.500) |
geographic |
Antarctic Dronning Maud Land Blåskimen |
geographic_facet |
Antarctic Dronning Maud Land Blåskimen |
genre |
Antarc* Antarctic Blåskimen Island Dronning Maud Land Ice Sheet Journal of Glaciology |
genre_facet |
Antarc* Antarctic Blåskimen Island Dronning Maud Land Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 64, Pp 932-942 (2018) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143018000813/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2018.81 0022-1430 1727-5652 https://doaj.org/article/c85b651c05e7483d9b657e7fa5fb3bbb |
op_doi |
https://doi.org/10.1017/jog.2018.81 |
container_title |
Journal of Glaciology |
container_volume |
64 |
container_issue |
248 |
container_start_page |
932 |
op_container_end_page |
942 |
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1766047669835268096 |