Ice surface changes during recent glacial cycles along the Jutulstraumen and Penck Trough ice streams in western Dronning Maud Land, East Antarctica
Reconstructing past ice-sheet surface changes is key to testing and improving ice-sheet models. Data constraining the past behaviour of the East Antarctic Ice Sheet are sparse, limiting our understanding of its response to past, present and future climate change. Here, we report the first cosmogenic...
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Online Access: | http://eprints.gla.ac.uk/225746/ http://eprints.gla.ac.uk/225746/2/225746.pdf |
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ftuglasgow:oai:eprints.gla.ac.uk:225746 2023-05-15T13:52:39+02:00 Ice surface changes during recent glacial cycles along the Jutulstraumen and Penck Trough ice streams in western Dronning Maud Land, East Antarctica Andersen, J.L. Newall, J.C. Blomdin, R. Sams, S.E. Fabel, D. Koester, A.J. Lifton, N.A. Fredin, O. Caffee, M.W. Glasser, Neil F. Rogozhina, I. Suganuma, Y. Harbor, J.M. Stroeven, A.P. 2020-12-01 text http://eprints.gla.ac.uk/225746/ http://eprints.gla.ac.uk/225746/2/225746.pdf en eng Elsevier http://eprints.gla.ac.uk/225746/2/225746.pdf Andersen, J.L. et al. (2020) Ice surface changes during recent glacial cycles along the Jutulstraumen and Penck Trough ice streams in western Dronning Maud Land, East Antarctica. Quaternary Science Reviews <http://eprints.gla.ac.uk/view/journal_volume/Quaternary_Science_Reviews.html>, 249, 106636. (doi:10.1016/j.quascirev.2020.106636 <http://dx.doi.org/10.1016/j.quascirev.2020.106636>) cc_by_nc_nd_4 CC-BY-NC-ND Articles PeerReviewed 2020 ftuglasgow https://doi.org/10.1016/j.quascirev.2020.106636 2021-10-28T22:10:31Z Reconstructing past ice-sheet surface changes is key to testing and improving ice-sheet models. Data constraining the past behaviour of the East Antarctic Ice Sheet are sparse, limiting our understanding of its response to past, present and future climate change. Here, we report the first cosmogenic multi-nuclide (10Be, 26Al, 36Cl) data from bedrock and erratics on nunataks along the Jutulstraumen and Penck Trough ice streams in western Dronning Maud Land, East Antarctica. Spanning elevations between 741 and 2394 m above sea level, the samples have apparent exposure ages between 2 ka and 5 Ma. The highest-elevation bedrock sample indicates (near-) continuous minimum exposure since the Pliocene, with a low apparent erosion rate of 0.15 ± 0.03 m Ma−1, which is similar to results from eastern Dronning Maud Land. In contrast to studies in eastern Dronning Maud Land, however, our data show clear indications of a thicker-than-present ice sheet within the last glacial cycle, with a thinning of ∼35–120 m during the Holocene (∼2–11 ka). Difficulties in separating suitable amounts of quartz from the often quartz-poor rock-types in the area, and cosmogenic nuclides inherited from exposure prior to the last deglaciation, prevented robust thinning estimates from elevational profiles. Nevertheless, the results clearly demonstrate ice-surface fluctuations of several hundred meters between the current grounding line and the edge of the polar plateau for the last glacial cycle, a constraint that should be considered in future ice-sheet model simulations. Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet University of Glasgow: Enlighten - Publications Antarctic Dronning Maud Land East Antarctic Ice Sheet East Antarctica Jutulstraumen ENVELOPE(-1.000,-1.000,-72.000,-72.000) Penck ENVELOPE(87.717,87.717,-66.700,-66.700) Penck Trough ENVELOPE(-2.750,-2.750,-73.000,-73.000) Polar Plateau ENVELOPE(0.000,0.000,-90.000,-90.000) Quaternary Science Reviews 249 106636 |
institution |
Open Polar |
collection |
University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
English |
description |
Reconstructing past ice-sheet surface changes is key to testing and improving ice-sheet models. Data constraining the past behaviour of the East Antarctic Ice Sheet are sparse, limiting our understanding of its response to past, present and future climate change. Here, we report the first cosmogenic multi-nuclide (10Be, 26Al, 36Cl) data from bedrock and erratics on nunataks along the Jutulstraumen and Penck Trough ice streams in western Dronning Maud Land, East Antarctica. Spanning elevations between 741 and 2394 m above sea level, the samples have apparent exposure ages between 2 ka and 5 Ma. The highest-elevation bedrock sample indicates (near-) continuous minimum exposure since the Pliocene, with a low apparent erosion rate of 0.15 ± 0.03 m Ma−1, which is similar to results from eastern Dronning Maud Land. In contrast to studies in eastern Dronning Maud Land, however, our data show clear indications of a thicker-than-present ice sheet within the last glacial cycle, with a thinning of ∼35–120 m during the Holocene (∼2–11 ka). Difficulties in separating suitable amounts of quartz from the often quartz-poor rock-types in the area, and cosmogenic nuclides inherited from exposure prior to the last deglaciation, prevented robust thinning estimates from elevational profiles. Nevertheless, the results clearly demonstrate ice-surface fluctuations of several hundred meters between the current grounding line and the edge of the polar plateau for the last glacial cycle, a constraint that should be considered in future ice-sheet model simulations. |
format |
Article in Journal/Newspaper |
author |
Andersen, J.L. Newall, J.C. Blomdin, R. Sams, S.E. Fabel, D. Koester, A.J. Lifton, N.A. Fredin, O. Caffee, M.W. Glasser, Neil F. Rogozhina, I. Suganuma, Y. Harbor, J.M. Stroeven, A.P. |
spellingShingle |
Andersen, J.L. Newall, J.C. Blomdin, R. Sams, S.E. Fabel, D. Koester, A.J. Lifton, N.A. Fredin, O. Caffee, M.W. Glasser, Neil F. Rogozhina, I. Suganuma, Y. Harbor, J.M. Stroeven, A.P. Ice surface changes during recent glacial cycles along the Jutulstraumen and Penck Trough ice streams in western Dronning Maud Land, East Antarctica |
author_facet |
Andersen, J.L. Newall, J.C. Blomdin, R. Sams, S.E. Fabel, D. Koester, A.J. Lifton, N.A. Fredin, O. Caffee, M.W. Glasser, Neil F. Rogozhina, I. Suganuma, Y. Harbor, J.M. Stroeven, A.P. |
author_sort |
Andersen, J.L. |
title |
Ice surface changes during recent glacial cycles along the Jutulstraumen and Penck Trough ice streams in western Dronning Maud Land, East Antarctica |
title_short |
Ice surface changes during recent glacial cycles along the Jutulstraumen and Penck Trough ice streams in western Dronning Maud Land, East Antarctica |
title_full |
Ice surface changes during recent glacial cycles along the Jutulstraumen and Penck Trough ice streams in western Dronning Maud Land, East Antarctica |
title_fullStr |
Ice surface changes during recent glacial cycles along the Jutulstraumen and Penck Trough ice streams in western Dronning Maud Land, East Antarctica |
title_full_unstemmed |
Ice surface changes during recent glacial cycles along the Jutulstraumen and Penck Trough ice streams in western Dronning Maud Land, East Antarctica |
title_sort |
ice surface changes during recent glacial cycles along the jutulstraumen and penck trough ice streams in western dronning maud land, east antarctica |
publisher |
Elsevier |
publishDate |
2020 |
url |
http://eprints.gla.ac.uk/225746/ http://eprints.gla.ac.uk/225746/2/225746.pdf |
long_lat |
ENVELOPE(-1.000,-1.000,-72.000,-72.000) ENVELOPE(87.717,87.717,-66.700,-66.700) ENVELOPE(-2.750,-2.750,-73.000,-73.000) ENVELOPE(0.000,0.000,-90.000,-90.000) |
geographic |
Antarctic Dronning Maud Land East Antarctic Ice Sheet East Antarctica Jutulstraumen Penck Penck Trough Polar Plateau |
geographic_facet |
Antarctic Dronning Maud Land East Antarctic Ice Sheet East Antarctica Jutulstraumen Penck Penck Trough Polar Plateau |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet |
op_relation |
http://eprints.gla.ac.uk/225746/2/225746.pdf Andersen, J.L. et al. (2020) Ice surface changes during recent glacial cycles along the Jutulstraumen and Penck Trough ice streams in western Dronning Maud Land, East Antarctica. Quaternary Science Reviews <http://eprints.gla.ac.uk/view/journal_volume/Quaternary_Science_Reviews.html>, 249, 106636. (doi:10.1016/j.quascirev.2020.106636 <http://dx.doi.org/10.1016/j.quascirev.2020.106636>) |
op_rights |
cc_by_nc_nd_4 |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.quascirev.2020.106636 |
container_title |
Quaternary Science Reviews |
container_volume |
249 |
container_start_page |
106636 |
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1766257076527431680 |