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DOI | 10.1126/sciadv.1600983 |
Snowball Earth climate dynamics and Cryogenian geology-geobiology | |
Hoffman, Paul F.1,2; Abbot, Dorian S.3; Ashkenazy, Yosef4; Benn, Douglas I.5; Brocks, Jochen J.6; Cohen, Phoebe A.7; Cox, Grant M.8,9; Creveling, Jessica R.10; Donnadieu, Yannick11,12; Erwin, Douglas H.13,14; Fairchild, Ian J.15; Ferreira, David16; Goodman, Jason C.17; Halverson, Galen P.18; Jansen, Malte F.3; Le Hir, Guillaume19; Love, Gordon D.20; Macdonald, Francis A.1; Maloof, Adam C.21; Partin, Camille A.22; Ramstein, Gilles11; Rose, Brian E. J.23; Rose, Catherine V.24,28; Sadler, Peter M.; Tziperman, Eli1; Voigt, Aiko25,26; Warren, Stephen G.27 | |
通讯作者 | Hoffman, Paul F. |
来源期刊 | SCIENCE ADVANCES
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ISSN | 2375-2548 |
出版年 | 2017 |
卷号 | 3期号:11 |
英文摘要 | 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 evolutionary legacy of Snowball Earth is perceptible in fossils and living organisms. |
类型 | Article |
语种 | 英语 |
国家 | USA ; Canada ; Israel ; Scotland ; Australia ; France ; England ; Ireland ; Germany |
收录类别 | SCI-E |
WOS记录号 | WOS:000418002000002 |
WOS关键词 | NEOPROTEROZOIC CAP CARBONATES ; U-PB GEOCHRONOLOGY ; VASE-SHAPED MICROFOSSILS ; RE-OS GEOCHRONOLOGY ; MICROCIONA-PROLIFERA ELLIS ; LOW-LATITUDE GLACIATION ; DEATH-VALLEY-REGION ; ANTARCTIC SEA-ICE ; IRON-FORMATION ; MACKENZIE MOUNTAINS |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
来源机构 | Ben-Gurion University of the Negev ; French National Research Institute for Sustainable Development |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/202171 |
作者单位 | 1.Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138 USA; 2.Univ Victoria, Sch Earth & Ocean Sci, Victoria, BC V8P 5C2, Canada; 3.Univ Chicago, Dept Geophys Sci, 5734 S Ellis Ave, Chicago, IL 60637 USA; 4.Ben Gurion Univ Negev, Dept Solar Energy & Environm Phys, IL-84990 Midreshet Ben Gurion, Israel; 5.Univ St Andrews, Sch Geog & Sustainable Dev, St Andrews KY16 8YA, Fife, Scotland; 6.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 2601, Australia; 7.Geosci Williams Coll, Williamstown, MA 01267 USA; 8.Univ Adelaide, Dept Earth Sci, Ctr Tecton Resources & Explorat TRaX, Adelaide, SA 5005, Australia; 9.Curtin Univ, Dept Appl Geol, Bentley, WA 6845, Australia; 10.Oregon State Univ, Coll Earth Ocean & Atmospher Sci, Corvallis, OR 97331 USA; 11.Univ Paris Saclay, CNRS, CEA, UVSQ,IPSL,LSCE, F-91191 Gif Sur Yvette, France; 12.Aix Marseille Univ, CNRS, IRD, CEREGE, F-13545 Aix En Provence, France; 13.Smithsonian Inst, Dept Paleobiol, POB 37012,MRC 121, Washington, DC 20013 USA; 14.Santa Fe Inst, 1399 Hyde Pk Rd, Santa Fe, NM 87501 USA; 15.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham B15 2TT, W Midlands, England; 16.Univ Reading, Dept Meteorol, Reading RG6 6BB, Berks, England; 17.Wheaton Coll, Dept Environm Sci, Norton, MA 02766 USA; 18.McGill Univ, Dept Earth & Planetary Sci, Montreal H3A 0E8, PQ, Canada; 19.Inst Phys Globe Paris, 1 Rue Jussieu, F-75005 Paris, France; 20.Univ Calif Riverside, Dept Earth Sci, Riverside, CA 92521 USA; 21.Princeton Univ, Dept Geosci, Princeton, NJ 08544 USA; 22.Univ Saskatchewan, Dept Geol Sci, Saskatoon S7N 5ER, SK, Canada; 23.Univ Albany, Dept Atmospher & Environm Sci, Albany, NY 12222 USA; 24.Trinity Coll Dublin, Dept Geol, Dublin 2, Ireland; 25.Karlsruhe Inst Technol, Dept Troposphere Res, Inst Meteorol & Climate Res, Karlsruhe, Baden Wurttembe, Germany; 26.Columbia Univ, Lamont Doherty Earth Observ, POB 1000, Palisades, NY 10964 USA; 27.Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA; 28.Univ St Andrews, Sch Earth & Environm Sci, Irvine Bldg, St Andrews KY16 9AL, Fife, Scotland |
推荐引用方式 GB/T 7714 | Hoffman, Paul F.,Abbot, Dorian S.,Ashkenazy, Yosef,et al. Snowball Earth climate dynamics and Cryogenian geology-geobiology[J]. Ben-Gurion University of the Negev, French National Research Institute for Sustainable Development,2017,3(11). |
APA | Hoffman, Paul F..,Abbot, Dorian S..,Ashkenazy, Yosef.,Benn, Douglas I..,Brocks, Jochen J..,...&Warren, Stephen G..(2017).Snowball Earth climate dynamics and Cryogenian geology-geobiology.SCIENCE ADVANCES,3(11). |
MLA | Hoffman, Paul F.,et al."Snowball Earth climate dynamics and Cryogenian geology-geobiology".SCIENCE ADVANCES 3.11(2017). |
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