An East Siberian ice shelf during the Late Pleistocene glaciations: Numerical reconstructions
A recent data campaign in the East Siberian Sea has revealed evidence of grounded and floating ice dynamics in regions of up to 1000 m water depth, and which are attributed to glaciations older than the Last Glacial Maximum (21 kyrs BP). The main hypothesis based on this evidence is that a small ice...
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ftawi:oai:epic.awi.de:39582 2024-09-15T17:42:58+00:00 An East Siberian ice shelf during the Late Pleistocene glaciations: Numerical reconstructions Colleoni, Florence Kirchner, Nina Niessen, Frank Quiquet, Aurélien Liakka, Johan 2016 application/pdf https://epic.awi.de/id/eprint/39582/ https://epic.awi.de/id/eprint/39582/2/Colleoni_et_al_QSR_2016.pdf https://hdl.handle.net/10013/epic.48840 https://hdl.handle.net/10013/epic.48840.d002 unknown PERGAMON-ELSEVIER SCIENCE LTD https://epic.awi.de/id/eprint/39582/2/Colleoni_et_al_QSR_2016.pdf https://hdl.handle.net/10013/epic.48840.d002 Colleoni, F. , Kirchner, N. , Niessen, F. orcid:0000-0001-6453-0594 , Quiquet, A. and Liakka, J. (2016) An East Siberian ice shelf during the Late Pleistocene glaciations: Numerical reconstructions , Quaternary Science Reviews, 147 , pp. 148-163 . doi:10.1016/j.quascirev.2015.12.023 <https://doi.org/10.1016/j.quascirev.2015.12.023> , hdl:10013/epic.48840 EPIC3Quaternary Science Reviews, PERGAMON-ELSEVIER SCIENCE LTD, 147, pp. 148-163, ISSN: 0277-3791 Article isiRev 2016 ftawi https://doi.org/10.1016/j.quascirev.2015.12.023 2024-06-24T04:13:16Z A recent data campaign in the East Siberian Sea has revealed evidence of grounded and floating ice dynamics in regions of up to 1000 m water depth, and which are attributed to glaciations older than the Last Glacial Maximum (21 kyrs BP). The main hypothesis based on this evidence is that a small ice cap developed over Beringia and expanded over the East Siberian continental margin during some of the Late Pleistocene glaciations. Other similar evidence of ice dynamics that have been previously collected on the shallow continental shelves of the Arctic Ocean have been attributed to the penultimate glaciation, i.e. Marine Isotopes Stage 6 (z 140 kyrs BP). We use an ice sheet model, forced by two previously simulated MIS 6 glacial maximum climates, to carry out a series of sensitivity experiments testing the impact of dynamics and mass-balance related parameters on the geometry of the East Siberian ice cap and ice shelf. Results show that the ice cap developing over Beringia connects to the Eurasian ice sheet in all simulations and that its volume ranges between 6 and 14 m SLE, depending on the climate forcing. This ice cap generates an ice shelf of dimensions comparable with or larger than the present-day Ross ice shelf in West Antarctica. Although the ice shelf extent strongly depends on the ice flux through the grounding line, it is particularly sensitive to the choice of the calving and basal melting parameters. Finally, inhibiting a merging of the Beringia ice cap with the Eurasian ice sheet affects the expansion of the ice shelf only in the simulations where the ice cap fluxes are not large enough to compensate for the fluxes coming from the Eurasian ice sheet. Article in Journal/Newspaper Antarc* Antarctica Arctic Ocean East Siberian Sea Ice cap Ice Sheet Ice Shelf Ross Ice Shelf West Antarctica Beringia Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Quaternary Science Reviews 147 148 163 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
A recent data campaign in the East Siberian Sea has revealed evidence of grounded and floating ice dynamics in regions of up to 1000 m water depth, and which are attributed to glaciations older than the Last Glacial Maximum (21 kyrs BP). The main hypothesis based on this evidence is that a small ice cap developed over Beringia and expanded over the East Siberian continental margin during some of the Late Pleistocene glaciations. Other similar evidence of ice dynamics that have been previously collected on the shallow continental shelves of the Arctic Ocean have been attributed to the penultimate glaciation, i.e. Marine Isotopes Stage 6 (z 140 kyrs BP). We use an ice sheet model, forced by two previously simulated MIS 6 glacial maximum climates, to carry out a series of sensitivity experiments testing the impact of dynamics and mass-balance related parameters on the geometry of the East Siberian ice cap and ice shelf. Results show that the ice cap developing over Beringia connects to the Eurasian ice sheet in all simulations and that its volume ranges between 6 and 14 m SLE, depending on the climate forcing. This ice cap generates an ice shelf of dimensions comparable with or larger than the present-day Ross ice shelf in West Antarctica. Although the ice shelf extent strongly depends on the ice flux through the grounding line, it is particularly sensitive to the choice of the calving and basal melting parameters. Finally, inhibiting a merging of the Beringia ice cap with the Eurasian ice sheet affects the expansion of the ice shelf only in the simulations where the ice cap fluxes are not large enough to compensate for the fluxes coming from the Eurasian ice sheet. |
format |
Article in Journal/Newspaper |
author |
Colleoni, Florence Kirchner, Nina Niessen, Frank Quiquet, Aurélien Liakka, Johan |
spellingShingle |
Colleoni, Florence Kirchner, Nina Niessen, Frank Quiquet, Aurélien Liakka, Johan An East Siberian ice shelf during the Late Pleistocene glaciations: Numerical reconstructions |
author_facet |
Colleoni, Florence Kirchner, Nina Niessen, Frank Quiquet, Aurélien Liakka, Johan |
author_sort |
Colleoni, Florence |
title |
An East Siberian ice shelf during the Late Pleistocene glaciations: Numerical reconstructions |
title_short |
An East Siberian ice shelf during the Late Pleistocene glaciations: Numerical reconstructions |
title_full |
An East Siberian ice shelf during the Late Pleistocene glaciations: Numerical reconstructions |
title_fullStr |
An East Siberian ice shelf during the Late Pleistocene glaciations: Numerical reconstructions |
title_full_unstemmed |
An East Siberian ice shelf during the Late Pleistocene glaciations: Numerical reconstructions |
title_sort |
east siberian ice shelf during the late pleistocene glaciations: numerical reconstructions |
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/39582/ https://epic.awi.de/id/eprint/39582/2/Colleoni_et_al_QSR_2016.pdf https://hdl.handle.net/10013/epic.48840 https://hdl.handle.net/10013/epic.48840.d002 |
genre |
Antarc* Antarctica Arctic Ocean East Siberian Sea Ice cap Ice Sheet Ice Shelf Ross Ice Shelf West Antarctica Beringia |
genre_facet |
Antarc* Antarctica Arctic Ocean East Siberian Sea Ice cap Ice Sheet Ice Shelf Ross Ice Shelf West Antarctica Beringia |
op_source |
EPIC3Quaternary Science Reviews, PERGAMON-ELSEVIER SCIENCE LTD, 147, pp. 148-163, ISSN: 0277-3791 |
op_relation |
https://epic.awi.de/id/eprint/39582/2/Colleoni_et_al_QSR_2016.pdf https://hdl.handle.net/10013/epic.48840.d002 Colleoni, F. , Kirchner, N. , Niessen, F. orcid:0000-0001-6453-0594 , Quiquet, A. and Liakka, J. (2016) An East Siberian ice shelf during the Late Pleistocene glaciations: Numerical reconstructions , Quaternary Science Reviews, 147 , pp. 148-163 . doi:10.1016/j.quascirev.2015.12.023 <https://doi.org/10.1016/j.quascirev.2015.12.023> , hdl:10013/epic.48840 |
op_doi |
https://doi.org/10.1016/j.quascirev.2015.12.023 |
container_title |
Quaternary Science Reviews |
container_volume |
147 |
container_start_page |
148 |
op_container_end_page |
163 |
_version_ |
1810489783715102720 |