An open ocean region in Neoproterozoic glaciations would have to be narrow to allow equatorial ice sheets
A major goal of understanding Neoproterozoic glaciations and determining their effect on the evolution of life and Earth's atmosphere is establishing whether and how much open ocean there was during them. Geological evidence tells us that continental ice sheets had to flow into the ocean near t...
Published in: | Geophysical Research Letters |
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ftpubman:oai:pure.mpg.de:item_1850968 2023-08-20T04:07:14+02:00 An open ocean region in Neoproterozoic glaciations would have to be narrow to allow equatorial ice sheets Rodehacke, C. Voigt, A. Ziemen, F. Abbot, D. 2013-11 application/pdf http://hdl.handle.net/11858/00-001M-0000-0014-9AA0-C http://hdl.handle.net/11858/00-001M-0000-0018-50AF-5 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1002/2013GL057582 http://hdl.handle.net/11858/00-001M-0000-0014-9AA0-C http://hdl.handle.net/11858/00-001M-0000-0018-50AF-5 info:eu-repo/semantics/openAccess Geophysical Research Letters info:eu-repo/semantics/article 2013 ftpubman https://doi.org/10.1002/2013GL057582 2023-08-01T22:59:36Z A major goal of understanding Neoproterozoic glaciations and determining their effect on the evolution of life and Earth's atmosphere is establishing whether and how much open ocean there was during them. Geological evidence tells us that continental ice sheets had to flow into the ocean near the equator during these glaciations. Here we drive the Parallel Ice Sheet Model with output from four simulations of the ECHAM5/Max Planck Institute Ocean Model atmosphere-ocean general circulation model with successively narrower open ocean regions. We find that extensive equatorial ice sheets form on marine margins if sea ice extends to within about 20° latitude of the equator or less (Jormungand-like and hard snowball states), but do not form if there is more open ocean than this. Given uncertainty in topographical reconstruction and ice sheet ablation parameterizations, we perform extensive sensitivity tests to confirm the robustness of our main conclusions. © 2013. American Geophysical Union. Article in Journal/Newspaper Ice Sheet Sea ice Max Planck Society: MPG.PuRe Geophysical Research Letters 40 20 5503 5507 |
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Open Polar |
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Max Planck Society: MPG.PuRe |
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language |
English |
description |
A major goal of understanding Neoproterozoic glaciations and determining their effect on the evolution of life and Earth's atmosphere is establishing whether and how much open ocean there was during them. Geological evidence tells us that continental ice sheets had to flow into the ocean near the equator during these glaciations. Here we drive the Parallel Ice Sheet Model with output from four simulations of the ECHAM5/Max Planck Institute Ocean Model atmosphere-ocean general circulation model with successively narrower open ocean regions. We find that extensive equatorial ice sheets form on marine margins if sea ice extends to within about 20° latitude of the equator or less (Jormungand-like and hard snowball states), but do not form if there is more open ocean than this. Given uncertainty in topographical reconstruction and ice sheet ablation parameterizations, we perform extensive sensitivity tests to confirm the robustness of our main conclusions. © 2013. American Geophysical Union. |
format |
Article in Journal/Newspaper |
author |
Rodehacke, C. Voigt, A. Ziemen, F. Abbot, D. |
spellingShingle |
Rodehacke, C. Voigt, A. Ziemen, F. Abbot, D. An open ocean region in Neoproterozoic glaciations would have to be narrow to allow equatorial ice sheets |
author_facet |
Rodehacke, C. Voigt, A. Ziemen, F. Abbot, D. |
author_sort |
Rodehacke, C. |
title |
An open ocean region in Neoproterozoic glaciations would have to be narrow to allow equatorial ice sheets |
title_short |
An open ocean region in Neoproterozoic glaciations would have to be narrow to allow equatorial ice sheets |
title_full |
An open ocean region in Neoproterozoic glaciations would have to be narrow to allow equatorial ice sheets |
title_fullStr |
An open ocean region in Neoproterozoic glaciations would have to be narrow to allow equatorial ice sheets |
title_full_unstemmed |
An open ocean region in Neoproterozoic glaciations would have to be narrow to allow equatorial ice sheets |
title_sort |
open ocean region in neoproterozoic glaciations would have to be narrow to allow equatorial ice sheets |
publishDate |
2013 |
url |
http://hdl.handle.net/11858/00-001M-0000-0014-9AA0-C http://hdl.handle.net/11858/00-001M-0000-0018-50AF-5 |
genre |
Ice Sheet Sea ice |
genre_facet |
Ice Sheet Sea ice |
op_source |
Geophysical Research Letters |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2013GL057582 http://hdl.handle.net/11858/00-001M-0000-0014-9AA0-C http://hdl.handle.net/11858/00-001M-0000-0018-50AF-5 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2013GL057582 |
container_title |
Geophysical Research Letters |
container_volume |
40 |
container_issue |
20 |
container_start_page |
5503 |
op_container_end_page |
5507 |
_version_ |
1774718728631484416 |