Snowball Earth climate dynamics and Cryogenian geology-geobiology
Paul F. Hoffman
(1)
,
Dorian S. Abbot
(2)
,
Yosef Ashkenazy
(3)
,
Douglas I. Benn
(4)
,
Jochen J. Brocks
(5)
,
Phoebe A. Cohen
(6)
,
Grant M. Cox
(7)
,
Jessica R. Creveling
(8)
,
Yannick Donnadieu
(9, 10, 11)
,
Douglas H. Erwin
(12)
,
Ian J. Fairchild
(13)
,
David Ferreira
(14)
,
Jason C. Goodman
(15)
,
Galen P. Halverson
(16)
,
Malte F. Jansen
(2)
,
Guillaume Le Hir
(17)
,
Gordon D. Love
(18)
,
Francis A. Macdonald
(1)
,
Adam C. Maloof
(19)
,
Camille A. Partin
(20)
,
Gilles Ramstein
(10, 11)
,
Brian E. J. Rose
(21)
,
Catherine V. Rose
(22)
,
Peter M. Sadler
(18)
,
Eli Tziperman
(1)
,
Aiko Voigt
(23)
,
Stephen G. Warren
(24)
1
Harvard University
2 University of Chicago
3 BGU - Ben-Gurion University of the Negev
4 University of St Andrews [Scotland]
5 ANU - Australian National University
6 Williams College [Williamstown]
7 University of South Australia [Adelaide]
8 OSU - Oregon State University
9 CEREGE - Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement
10 LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
11 CLIM - Modélisation du climat
12 Smithsonian Institution
13 University of Birmingham [Birmingham]
14 UOR - University of Reading
15 Wheaton College [Norton]
16 McGill University = Université McGill [Montréal, Canada]
17 IPGP - Institut de Physique du Globe de Paris
18 UC Riverside - University of California [Riverside]
19 Princeton University
20 U of S - University of Saskatchewan [Saskatoon, Canada]
21 University at Albany [SUNY]
22 Trinity College Dublin
23 INT - Institute of Nanotechnology [Karlsruhe]
24 University of Washington [Seattle]
2 University of Chicago
3 BGU - Ben-Gurion University of the Negev
4 University of St Andrews [Scotland]
5 ANU - Australian National University
6 Williams College [Williamstown]
7 University of South Australia [Adelaide]
8 OSU - Oregon State University
9 CEREGE - Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement
10 LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
11 CLIM - Modélisation du climat
12 Smithsonian Institution
13 University of Birmingham [Birmingham]
14 UOR - University of Reading
15 Wheaton College [Norton]
16 McGill University = Université McGill [Montréal, Canada]
17 IPGP - Institut de Physique du Globe de Paris
18 UC Riverside - University of California [Riverside]
19 Princeton University
20 U of S - University of Saskatchewan [Saskatoon, Canada]
21 University at Albany [SUNY]
22 Trinity College Dublin
23 INT - Institute of Nanotechnology [Karlsruhe]
24 University of Washington [Seattle]
Paul F. Hoffman
Connectez-vous pour contacter l'auteur
- Fonction : Auteur correspondant
- PersonId : 1037145
Connectez-vous pour contacter l'auteur
Yannick Donnadieu
- Fonction : Auteur
- PersonId : 12557
- IdHAL : yannick-donnadieu
- ORCID : 0000-0002-7315-2684
- IdRef : 081511728
Guillaume Le Hir
- Fonction : Auteur
- PersonId : 763763
- IdHAL : guillaume-le-hir
- ORCID : 0000-0002-6799-8173
- IdRef : 200370219
Gilles Ramstein
- Fonction : Auteur
- PersonId : 758670
- ORCID : 0000-0002-1522-917X
- IdRef : 033153256
Résumé
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 CO$_2$ was 10$^2$ 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 CO$_2$ 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 evolutionary legacy of Snowball Earth is perceptible in fossils and living organisms.
Domaines
Sciences de la TerreFormat du dépôt | Fichier |
---|---|
Type de dépôt | Article dans une revue |
Résumé |
en
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 CO$_2$ was 10$^2$ 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 CO$_2$ 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 evolutionary legacy of Snowball Earth is perceptible in fossils and living organisms.
|
Titre |
en
Snowball Earth climate dynamics and Cryogenian geology-geobiology
|
Auteur(s) |
Paul F. Hoffman
1
, Dorian S. Abbot
2
, Yosef Ashkenazy
3
, Douglas I. Benn
4
, Jochen J. Brocks
5
, Phoebe A. Cohen
6
, Grant M. Cox
7
, Jessica R. Creveling
8
, Yannick Donnadieu
9, 10, 11
, Douglas H. Erwin
12
, Ian J. Fairchild
13
, David Ferreira
14
, Jason C. Goodman
15
, Galen P. Halverson
16
, Malte F. Jansen
2
, Guillaume Le Hir
17
, Gordon D. Love
18
, Francis A. Macdonald
1
, Adam C. Maloof
19
, Camille A. Partin
20
, Gilles Ramstein
10, 11
, Brian E. J. Rose
21
, Catherine V. Rose
22
, Peter M. Sadler
18
, Eli Tziperman
1
, Aiko Voigt
23
, Stephen G. Warren
24
1
Harvard University
( 38302 )
- Massachusetts Hall, Cambridge, MA 02138
- États-Unis
2
University of Chicago
( 129172 )
- Edward H. Levi Hall 5801 South Ellis Avenue Chicago, Illinois 60637
- États-Unis
3
BGU -
Ben-Gurion University of the Negev
( 300759 )
- P.O.B. 653 Beer-Sheva
- Israël
4
University of St Andrews [Scotland]
( 14827 )
- St Andrews KY16 9AJ, Fife, Scotland, UK
- Royaume-Uni
5
ANU -
Australian National University
( 74662 )
- The Australian National University Canberra ACT 0200 Australia
- Australie
6
Williams College [Williamstown]
( 365284 )
- Williams College, 18 Hoxsey Street, Williamstown, MA 01267, USA
- États-Unis
7
University of South Australia [Adelaide]
( 116321 )
- 101 Currie St, Adelaide SA 5001
- Australie
8
OSU -
Oregon State University
( 489548 )
- 1500 SW Jefferson St., Corvallis, OR 97331
- États-Unis
9
CEREGE -
Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement
( 199954 )
- Europôle Méditerranéen de l'Arbois - Avenue Louis Philibert - BP 80 - 13545 Aix-en-Provence cedex 4
- France
10
LSCE -
Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
( 518 )
- Bât. 12,
avenue de la Terrasse,
F-91198 GIF-SUR-YVETTE CEDEX
- France
11
CLIM -
Modélisation du climat
( 1007954 )
- LSCE. CEA Paris-Saclay. Orme des merisiers. 91190 Saint-Aubin.
- France
12
Smithsonian Institution
( 300511 )
- PO Box 37012, Washington, DC 20013-7012
- États-Unis
13
University of Birmingham [Birmingham]
( 421435 )
- Edgbaston
Birmingham B15 2TT
- Royaume-Uni
14
UOR -
University of Reading
( 47262 )
- Whiteknights, PO Box 217, READING, Berkshire, RG6 6AH,
- Royaume-Uni
15
Wheaton College [Norton]
( 489174 )
- 26 E. Main Street, Norton, MA 02766
- États-Unis
16
McGill University = Université McGill [Montréal, Canada]
( 134741 )
- 845, rue Sherbrooke O. Montréal (Québec) Canada H3A 0G4
- Canada
17
IPGP -
Institut de Physique du Globe de Paris
( 250059 )
- IPGP, 1 rue Jussieu, 75238 Paris cedex 05 ; Université Paris Diderot, Bât. Lamarck A case postale 7011, 75205 Paris CEDEX 13
- France
18
UC Riverside -
University of California [Riverside]
( 300446 )
- 900 University Ave. Riverside, CA 92521
- États-Unis
19
Princeton University
( 46584 )
- Princeton, NJ 08544 USA
- États-Unis
20
U of S -
University of Saskatchewan [Saskatoon, Canada]
( 67142 )
- Saskatoon, Saskatchewan Canada
- Canada
21
University at Albany [SUNY]
( 34649 )
- 1400 Washington Avenue - Albany, NY 12222
- États-Unis
22
Trinity College Dublin
( 22205 )
- College Green, Dublin 2, Ireland
- Irlande
23
INT -
Institute of Nanotechnology [Karlsruhe]
( 101566 )
- P.O. Box 3640, 76021 Karlsruhe, Germany
- Allemagne
24
University of Washington [Seattle]
( 300433 )
- Seattle, Washington 98105
- États-Unis
|
Comité de lecture |
Oui
|
Vulgarisation |
Non
|
Nom de la revue |
|
Langue du document |
Anglais
|
Date de publication |
2017
|
Volume |
3
|
Audience |
Internationale
|
Numéro |
11
|
Page/Identifiant |
e1600983
|
Domaine(s) |
|
DOI | 10.1126/sciadv.1600983 |
Origine :
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