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Obliquity Control On Southern Hemisphere Climate During The Last Glacial. Sci Rep 2015; 5:11673. [PMID: 26115344 PMCID: PMC4650511 DOI: 10.1038/srep11673] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 06/02/2015] [Indexed: 12/03/2022] Open
Abstract
Recent paleoclimate reconstructions have challenged the traditional view that Northern Hemisphere insolation and associated feedbacks drove synchronous global climate and ice-sheet volume during the last glacial cycle. Here we focus on the response of the Patagonian Ice Sheet, and demonstrate that its maximum expansion culminated at 28,400 ± 500 years before present (28.4 ± 0.5 ka), more than 5,000 years before the minima in 65°N summer insolation and the formally-defined Last Glacial Maximum (LGM) at 21,000 ± 2,000 years before present. To investigate the potential drivers of this early LGM (eLGM), we simulate the effects of orbital changes using a suite of climate models incorporating prescribed and evolving sea-ice anomalies. Our analyses suggest that Antarctic sea-ice expansion at 28.5 ka altered the location and intensity of the Southern Hemisphere storm track, triggering regional cooling over Patagonia of 5°C that extends across the wider mid-southern latitudes. In contrast, at the LGM, continued sea-ice expansion reduced regional temperature and precipitation further, effectively starving the ice sheet and resulting in reduced glacial expansion. Our findings highlight the dominant role that orbital changes can play in driving Southern Hemisphere glacial climate via the sensitivity of mid-latitude regions to changes in Antarctic sea-ice extent.
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Gillespie AR, Bierman PR. Precision of terrestrial exposure ages and erosion rates estimated from analysis of cosmogenic isotopes produced in situ. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/95jb02911] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Gillespie AR, Clark DH. Glaciations of the Sierra Nevada, California, USA. DEVELOPMENTS IN QUATERNARY SCIENCES 2011. [DOI: 10.1016/b978-0-444-53447-7.00034-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Phillips FM, Zreda M, Plummer MA, Elmore D, Clark DH. Glacial geology and chronology of Bishop Creek and vicinity, eastern Sierra Nevada, California. ACTA ACUST UNITED AC 2009. [DOI: 10.1130/b26271.1] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fred M. Phillips
- Earth & Environmental Science Department, New Mexico Tech, Socorro, New Mexico 87801, USA
| | - Marek Zreda
- Department of Hydrology & Water Resources, University of Arizona, Tucson, Arizona 85712, USA
| | - Mitchell A. Plummer
- Earth & Environmental Science Department, New Mexico Tech, Socorro, New Mexico 87801, USA
| | - David Elmore
- Purdue Rare Isotope Measurement Laboratory, Physics Department, Purdue University, West Lafayette, Indiana 47907-1396, USA
| | - Douglas H. Clark
- Department of Geology, Western Washington University, Bellingham, Washington 98225-9080, USA
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Plug LJ, West JJ. Thaw lake expansion in a two-dimensional coupled model of heat transfer, thaw subsidence, and mass movement. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2006jf000740] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Applegate PJ, Lowell TV, Alley RB. Comment on "Absence of Cooling in New Zealand and the Adjacent Ocean During the Younger Dryas Chronozone". Science 2008; 320:746; author reply 746. [DOI: 10.1126/science.1152098] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Patrick J. Applegate
- Department of Geosciences, Pennsylvania State University, University Park, PA 16802, USA
- Department of Geology, University of Cincinnati, Cincinnati, OH 45221, USA
- Department of Geosciences and Earth and Environmental Systems Institute, Pennsylvania State University, University Park, PA 16802, USA
| | - Thomas V. Lowell
- Department of Geosciences, Pennsylvania State University, University Park, PA 16802, USA
- Department of Geology, University of Cincinnati, Cincinnati, OH 45221, USA
- Department of Geosciences and Earth and Environmental Systems Institute, Pennsylvania State University, University Park, PA 16802, USA
| | - Richard B. Alley
- Department of Geosciences, Pennsylvania State University, University Park, PA 16802, USA
- Department of Geology, University of Cincinnati, Cincinnati, OH 45221, USA
- Department of Geosciences and Earth and Environmental Systems Institute, Pennsylvania State University, University Park, PA 16802, USA
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In situ cosmogenic 10Be dating of the Quaternary glaciations in the southern Shaluli Mountain on the Southeastern Tibetan Plateau. ACTA ACUST UNITED AC 2006. [DOI: 10.1007/s11430-006-2026-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Nichols KK, Bierman PR, Foniri WR, Gillespie AR, Caffee M, Finkel R. Dates and rates of arid region geomorphic processes. ACTA ACUST UNITED AC 2006. [DOI: 10.1130/gsat01608.1] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Brown ET, Molnar P, Bourlès DL. Comment on "Slip-Rate Measurements on the Karakorum Fault May Imply Secular Variations in Fault Motion". Science 2005. [DOI: 10.1126/science.1112508] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Erik T. Brown
- Large Lakes Observatory and Department of Geological Sciences, University of Minnesota Duluth, Duluth, MN 55812, USA
| | - Peter Molnar
- Department of Geological Sciences and Cooperative Institute for Research in Environmental Science, University of Colorado at Boulder, Boulder, CO 80309, USA
| | - Didier L. Bourlès
- Centre Européen de Recherche et d'Enseignement en, Géosciences de l'Environnement, Unité Mixte de Recherche 6635, CNRS and Université d'Aix-Marseille III, Europôle de l'Arbois, F-13545 Aix-en-Provence cedex 4, France
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The Contribution of Cosmogenic Nuclides to Unraveling Alpine Paleoclimate Histories. ACTA ACUST UNITED AC 2005. [DOI: 10.1007/1-4020-3508-x_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Gillespie AR, Zehfuss PH. Glaciations of the Sierra Nevada, California, USA. QUATERNARY GLACIATIONS-EXTENT AND CHRONOLOGY - PART II: NORTH AMERICA 2004. [DOI: 10.1016/s1571-0866(04)80185-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Kaufman DS, Porter SC, Gillespie AR. Quaternary alpine glaciation in Alaska, the Pacific Northwest, Sierra Nevada, and Hawaii. THE QUATERNARY PERIOD IN THE UNITED STATES 2003. [DOI: 10.1016/s1571-0866(03)01005-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Brown ET, Bendick R, Bourlès DL, Gaur V, Molnar P, Raisbeck GM, Yiou F. Slip rates of the Karakorum fault, Ladakh, India, determined using cosmic ray exposure dating of debris flows and moraines. ACTA ACUST UNITED AC 2002. [DOI: 10.1029/2000jb000100] [Citation(s) in RCA: 144] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- E. T. Brown
- Large Lakes Observatory; University of Minnesota; Duluth Minnesota USA
| | - R. Bendick
- Department of Geological Sciences; University of Colorado; Boulder Colorado USA
| | - D. L. Bourlès
- Centre Européen de Recherche et d'Enseignement de Géosciences de l'Environnement; Europôle Méditerranéen de l'Arbois; Aix-en-Provence France
| | - V. Gaur
- Institute of Astrophysics; Bangalore India
| | - P. Molnar
- Department of Geological Sciences; University of Colorado; Boulder Colorado USA
| | - G. M. Raisbeck
- Centre de Spectrométrie Nucleaire et de Spectrométrie de Masse; CNRS-IN2P3; Orsay France
| | - F. Yiou
- Centre de Spectrométrie Nucleaire et de Spectrométrie de Masse; CNRS-IN2P3; Orsay France
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Phillips FM, Zreda MG, Benson LV, Plummer MA, Elmore D, Sharma P. Chronology for Fluctuations in Late Pleistocene Sierra Nevada Glaciers and Lakes. Science 1996. [DOI: 10.1126/science.274.5288.749] [Citation(s) in RCA: 157] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Liu T, Dorn RI. Understanding the Spatial Variability of Environmental Change in Drylands with Rock Varnish Microlaminations. ACTA ACUST UNITED AC 1996. [DOI: 10.1111/j.1467-8306.1996.tb01750.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Gosse JC, Klein J, Lawn B, Middleton R, Evenson EB. Beryllium-10 Dating of the Duration and Retreat of the Last Pinedale Glacial Sequence. Science 1995; 268:1329-33. [PMID: 17778979 DOI: 10.1126/science.268.5215.1329] [Citation(s) in RCA: 159] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Accurate terrestrial glacial chronologies are needed for comparison with the marine record to establish the dynamics of global climate change during transitions from glacial to interglacial regimes. Cosmogenic beryllium-10 measurements in the Wind River Range indicate that the last glacial maximum (marine oxygen isotope stage 2) was achieved there by 21,700 +/- 700 beryllium-10 years and lasted 5900 years. Ages of a sequence of recessional moraines and striated bedrock surfaces show that the initial deglaciation was rapid and that the entire glacial system retreated 33 kilometers to the cirque basin by 12,100 +/- 500 beryllium-10 years.
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