Snowball Earth climate dynamics and Cryogenian geology-geobiology
G.R. was supported by CNRS funding through the ECLIPSE program. B.E.J.R. was supported by NSF grant AGS-1455071. A.V. was supported by the German Federal Ministry of Education and Research (BMBF) and Research for Sustainable Development (FONA) (www.fona.de) under grant 01LK1509A. S.G.W. was supporte...
Published in: | Science Advances |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2017
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Online Access: | http://hdl.handle.net/10023/12187 https://doi.org/10.1126/sciadv.1600983 |
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University of St Andrews: Digital Research Repository |
op_collection_id |
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language |
English |
topic |
GE Environmental Sciences QE Geology T-DAS BDC SDG 14 - Life Below Water GE QE |
spellingShingle |
GE Environmental Sciences QE Geology T-DAS BDC SDG 14 - Life Below Water GE QE Hoffman, Paul F. Abbot, Dorian S. Ashkenazy, Yosef Benn, Douglas I. Brocks, Jochen J. Cohen, Phoebe A. Cox, Grant M. Creveling, Jessica R. Donnadieu, Yannick Erwin, Douglas H. Fairchild, Ian J. Ferreira, David Goodman, Jason C. Halverson, Galen P. Jansen, Malte F. Le Hir, Guillaume Love, Gordon D. Macdonald, Francis A. Maloof, Adam C. Partin, Camille A. Ramstein, Gilles Rose, Brian E. J. Rose, Catherine V. Sadler, Peter M. Tziperman, Eli Voigt, Aiko Warren, Stephen G. Snowball Earth climate dynamics and Cryogenian geology-geobiology |
topic_facet |
GE Environmental Sciences QE Geology T-DAS BDC SDG 14 - Life Below Water GE QE |
description |
G.R. was supported by CNRS funding through the ECLIPSE program. B.E.J.R. was supported by NSF grant AGS-1455071. A.V. was supported by the German Federal Ministry of Education and Research (BMBF) and Research for Sustainable Development (FONA) (www.fona.de) under grant 01LK1509A. S.G.W. was supported by NSF grant ANT-1142963. Geological evidence indicates that grounded ice sheets reached sea level at all latitudes during two long-lived Cryogenian (58 and ≥5 My) glaciations. Combined uranium-lead and rhenium-osmium dating suggests that the older (Sturtian) glacial onset and both terminations were globally synchronous. Geochemical data imply that CO2 was 102 PAL (present atmospheric level) at the younger termination, consistent with a global ice cover. Sturtian glaciation followed breakup of a tropical supercontinent, and its onset coincided with the equatorial emplacement of a large igneous province. Modeling shows that the small thermal inertia of a globally frozen surface reverses the annual mean tropical atmospheric circulation, producing an equatorial desert and net snow and frost accumulation elsewhere. Oceanic ice thickens, forming a sea glacier that flows gravitationally toward the equator, sustained by the hydrologic cycle and by basal freezing and melting. Tropical ice sheets flow faster as CO2 rises but lose mass and become sensitive to orbital changes. Equatorial dust accumulation engenders supraglacial oligotrophic meltwater ecosystems, favorable for cyanobacteria and certain eukaryotes. Meltwater flushing through cracks enables organic burial and submarine deposition of airborne volcanic ash. The subglacial ocean is turbulent and well mixed, in response to geothermal heating and heat loss through the ice cover, increasing with latitude. Terminal carbonate deposits, unique to Cryogenian glaciations, are products of intense weathering and ocean stratification. Whole-ocean warming and collapsing peripheral bulges allow marine coastal flooding to continue long after ice-sheet disappearance. The ... |
author2 |
University of St Andrews. School of Geography & Sustainable Development University of St Andrews. School of Earth & Environmental Sciences University of St Andrews. Bell-Edwards Geographic Data Institute |
format |
Article in Journal/Newspaper |
author |
Hoffman, Paul F. Abbot, Dorian S. Ashkenazy, Yosef Benn, Douglas I. Brocks, Jochen J. Cohen, Phoebe A. Cox, Grant M. Creveling, Jessica R. Donnadieu, Yannick Erwin, Douglas H. Fairchild, Ian J. Ferreira, David Goodman, Jason C. Halverson, Galen P. Jansen, Malte F. Le Hir, Guillaume Love, Gordon D. Macdonald, Francis A. Maloof, Adam C. Partin, Camille A. Ramstein, Gilles Rose, Brian E. J. Rose, Catherine V. Sadler, Peter M. Tziperman, Eli Voigt, Aiko Warren, Stephen G. |
author_facet |
Hoffman, Paul F. Abbot, Dorian S. Ashkenazy, Yosef Benn, Douglas I. Brocks, Jochen J. Cohen, Phoebe A. Cox, Grant M. Creveling, Jessica R. Donnadieu, Yannick Erwin, Douglas H. Fairchild, Ian J. Ferreira, David Goodman, Jason C. Halverson, Galen P. Jansen, Malte F. Le Hir, Guillaume Love, Gordon D. Macdonald, Francis A. Maloof, Adam C. Partin, Camille A. Ramstein, Gilles Rose, Brian E. J. Rose, Catherine V. Sadler, Peter M. Tziperman, Eli Voigt, Aiko Warren, Stephen G. |
author_sort |
Hoffman, Paul F. |
title |
Snowball Earth climate dynamics and Cryogenian geology-geobiology |
title_short |
Snowball Earth climate dynamics and Cryogenian geology-geobiology |
title_full |
Snowball Earth climate dynamics and Cryogenian geology-geobiology |
title_fullStr |
Snowball Earth climate dynamics and Cryogenian geology-geobiology |
title_full_unstemmed |
Snowball Earth climate dynamics and Cryogenian geology-geobiology |
title_sort |
snowball earth climate dynamics and cryogenian geology-geobiology |
publishDate |
2017 |
url |
http://hdl.handle.net/10023/12187 https://doi.org/10.1126/sciadv.1600983 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
Science Advances Hoffman , P F , Abbot , D S , Ashkenazy , Y , Benn , D I , Brocks , J J , Cohen , P A , Cox , G M , Creveling , J R , Donnadieu , Y , Erwin , D H , Fairchild , I J , Ferreira , D , Goodman , J C , Halverson , G P , Jansen , M F , Le Hir , G , Love , G D , Macdonald , F A , Maloof , A C , Partin , C A , Ramstein , G , Rose , B E J , Rose , C V , Sadler , P M , Tziperman , E , Voigt , A & Warren , S G 2017 , ' Snowball Earth climate dynamics and Cryogenian geology-geobiology ' , Science Advances , vol. 3 , no. 11 , e1600983 . https://doi.org/10.1126/sciadv.1600983 2375-2548 PURE: 250641115 PURE UUID: 8881bdb9-02ea-433e-999c-689c29b5d051 Bibtex: urn:b23f40752d81a3b6043ba17e225716bb Scopus: 85041915320 ORCID: /0000-0001-8149-0977/work/44097011 WOS: 000418002000002 ORCID: /0000-0002-3604-0886/work/64697397 http://hdl.handle.net/10023/12187 https://doi.org/10.1126/sciadv.1600983 |
op_rights |
Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
op_doi |
https://doi.org/10.1126/sciadv.1600983 |
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Science Advances |
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3 |
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/12187 2023-07-02T03:32:37+02:00 Snowball Earth climate dynamics and Cryogenian geology-geobiology Hoffman, Paul F. Abbot, Dorian S. Ashkenazy, Yosef Benn, Douglas I. Brocks, Jochen J. Cohen, Phoebe A. Cox, Grant M. Creveling, Jessica R. Donnadieu, Yannick Erwin, Douglas H. Fairchild, Ian J. Ferreira, David Goodman, Jason C. Halverson, Galen P. Jansen, Malte F. Le Hir, Guillaume Love, Gordon D. Macdonald, Francis A. Maloof, Adam C. Partin, Camille A. Ramstein, Gilles Rose, Brian E. J. Rose, Catherine V. Sadler, Peter M. Tziperman, Eli Voigt, Aiko Warren, Stephen G. University of St Andrews. School of Geography & Sustainable Development University of St Andrews. School of Earth & Environmental Sciences University of St Andrews. Bell-Edwards Geographic Data Institute 2017-11-29T11:30:11Z 43 application/pdf http://hdl.handle.net/10023/12187 https://doi.org/10.1126/sciadv.1600983 eng eng Science Advances Hoffman , P F , Abbot , D S , Ashkenazy , Y , Benn , D I , Brocks , J J , Cohen , P A , Cox , G M , Creveling , J R , Donnadieu , Y , Erwin , D H , Fairchild , I J , Ferreira , D , Goodman , J C , Halverson , G P , Jansen , M F , Le Hir , G , Love , G D , Macdonald , F A , Maloof , A C , Partin , C A , Ramstein , G , Rose , B E J , Rose , C V , Sadler , P M , Tziperman , E , Voigt , A & Warren , S G 2017 , ' Snowball Earth climate dynamics and Cryogenian geology-geobiology ' , Science Advances , vol. 3 , no. 11 , e1600983 . https://doi.org/10.1126/sciadv.1600983 2375-2548 PURE: 250641115 PURE UUID: 8881bdb9-02ea-433e-999c-689c29b5d051 Bibtex: urn:b23f40752d81a3b6043ba17e225716bb Scopus: 85041915320 ORCID: /0000-0001-8149-0977/work/44097011 WOS: 000418002000002 ORCID: /0000-0002-3604-0886/work/64697397 http://hdl.handle.net/10023/12187 https://doi.org/10.1126/sciadv.1600983 Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. GE Environmental Sciences QE Geology T-DAS BDC SDG 14 - Life Below Water GE QE Journal article 2017 ftstandrewserep https://doi.org/10.1126/sciadv.1600983 2023-06-13T18:29:36Z G.R. was supported by CNRS funding through the ECLIPSE program. B.E.J.R. was supported by NSF grant AGS-1455071. A.V. was supported by the German Federal Ministry of Education and Research (BMBF) and Research for Sustainable Development (FONA) (www.fona.de) under grant 01LK1509A. S.G.W. was supported by NSF grant ANT-1142963. Geological evidence indicates that grounded ice sheets reached sea level at all latitudes during two long-lived Cryogenian (58 and ≥5 My) glaciations. Combined uranium-lead and rhenium-osmium dating suggests that the older (Sturtian) glacial onset and both terminations were globally synchronous. Geochemical data imply that CO2 was 102 PAL (present atmospheric level) at the younger termination, consistent with a global ice cover. Sturtian glaciation followed breakup of a tropical supercontinent, and its onset coincided with the equatorial emplacement of a large igneous province. Modeling shows that the small thermal inertia of a globally frozen surface reverses the annual mean tropical atmospheric circulation, producing an equatorial desert and net snow and frost accumulation elsewhere. Oceanic ice thickens, forming a sea glacier that flows gravitationally toward the equator, sustained by the hydrologic cycle and by basal freezing and melting. Tropical ice sheets flow faster as CO2 rises but lose mass and become sensitive to orbital changes. Equatorial dust accumulation engenders supraglacial oligotrophic meltwater ecosystems, favorable for cyanobacteria and certain eukaryotes. Meltwater flushing through cracks enables organic burial and submarine deposition of airborne volcanic ash. The subglacial ocean is turbulent and well mixed, in response to geothermal heating and heat loss through the ice cover, increasing with latitude. Terminal carbonate deposits, unique to Cryogenian glaciations, are products of intense weathering and ocean stratification. Whole-ocean warming and collapsing peripheral bulges allow marine coastal flooding to continue long after ice-sheet disappearance. The ... Article in Journal/Newspaper Ice Sheet University of St Andrews: Digital Research Repository Science Advances 3 11 e1600983 |