View in EDS PDF Full Text

South Greenland ice-sheet collapse during Marine Isotope Stage 11.

Saved in:
Bibliographic Details
Title: South Greenland ice-sheet collapse during Marine Isotope Stage 11.
Authors: Reyes, Alberto V., Carlson, Anders E., Beard, Brian L., Hatfield, Robert G., Stoner, Joseph S., Winsor, Kelsey, Welke, Bethany, Ullman, David J.
Source: Nature. 6/26/2014, Vol. 510 Issue 7506, p525-528. 4p. 2 Graphs, 1 Map.
Subjects: Solar radiation, Earth system science, Quaternary paleoclimatology, Oxygen isotopes, Climate change
Geographic Terms: Greenland Ice Sheet (Greenland)
Abstract: Varying levels of boreal summer insolation and associated Earth system feedbacks led to differing climate and ice-sheet states during late-Quaternary interglaciations. In particular, Marine Isotope Stage (MIS) 11 was an exceptionally long interglaciation and potentially had a global mean sea level 6 to 13 metres above the present level around 410,000 to 400,000 years ago, implying substantial mass loss from the Greenland ice sheet (GIS). There are, however, no model simulations and only limited proxy data to constrain the magnitude of the GIS response to climate change during this 'super interglacial', thus confounding efforts to assess climate/ice-sheet threshold behaviour and associated sea-level rise. Here we show that the south GIS was drastically smaller during MIS 11 than it is now, with only a small residual ice dome over southernmost Greenland. We use the strontium-neodymium-lead isotopic composition of proglacial sediment discharged from south Greenland to constrain the provenance of terrigenous silt deposited on the Eirik Drift, a sedimentary deposit off the south Greenland margin. We identify a major reduction in sediment input derived from south Greenland's Precambrian bedrock terranes, probably reflecting the cessation of subglacial erosion and sediment transport as a result of near-complete deglaciation of south Greenland. Comparison with ice-sheet configurations from numerical models suggests that the GIS lost about 4.5 to 6 metres of sea-level-equivalent volume during MIS 11. This is evidence for late-Quaternary GIS collapse after it crossed a climate/ice-sheet stability threshold that may have been no more than several degrees above pre-industrial temperatures. [ABSTRACT FROM AUTHOR]
Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
FullText Links:
  – Type: pdflink
Text:
  Availability: 0
Header DbId: pbh
DbLabel: Psychology and Behavioral Sciences Collection
An: 96871535
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: South Greenland ice-sheet collapse during Marine Isotope Stage 11.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Reyes%2C+Alberto+V%2E%22">Reyes, Alberto V.</searchLink><br /><searchLink fieldCode="AR" term="%22Carlson%2C+Anders+E%2E%22">Carlson, Anders E.</searchLink><br /><searchLink fieldCode="AR" term="%22Beard%2C+Brian+L%2E%22">Beard, Brian L.</searchLink><br /><searchLink fieldCode="AR" term="%22Hatfield%2C+Robert+G%2E%22">Hatfield, Robert G.</searchLink><br /><searchLink fieldCode="AR" term="%22Stoner%2C+Joseph+S%2E%22">Stoner, Joseph S.</searchLink><br /><searchLink fieldCode="AR" term="%22Winsor%2C+Kelsey%22">Winsor, Kelsey</searchLink><br /><searchLink fieldCode="AR" term="%22Welke%2C+Bethany%22">Welke, Bethany</searchLink><br /><searchLink fieldCode="AR" term="%22Ullman%2C+David+J%2E%22">Ullman, David J.</searchLink>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Nature%22">Nature</searchLink>. 6/26/2014, Vol. 510 Issue 7506, p525-528. 4p. 2 Graphs, 1 Map.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Solar+radiation%22">Solar radiation</searchLink><br /><searchLink fieldCode="DE" term="%22Earth+system+science%22">Earth system science</searchLink><br /><searchLink fieldCode="DE" term="%22Quaternary+paleoclimatology%22">Quaternary paleoclimatology</searchLink><br /><searchLink fieldCode="DE" term="%22Oxygen+isotopes%22">Oxygen isotopes</searchLink><br /><searchLink fieldCode="DE" term="%22Climate+change%22">Climate change</searchLink>
– Name: SubjectGeographic
  Label: Geographic Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Greenland+Ice+Sheet+%28Greenland%29%22">Greenland Ice Sheet (Greenland)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Varying levels of boreal summer insolation and associated Earth system feedbacks led to differing climate and ice-sheet states during late-Quaternary interglaciations. In particular, Marine Isotope Stage (MIS) 11 was an exceptionally long interglaciation and potentially had a global mean sea level 6 to 13 metres above the present level around 410,000 to 400,000 years ago, implying substantial mass loss from the Greenland ice sheet (GIS). There are, however, no model simulations and only limited proxy data to constrain the magnitude of the GIS response to climate change during this 'super interglacial', thus confounding efforts to assess climate/ice-sheet threshold behaviour and associated sea-level rise. Here we show that the south GIS was drastically smaller during MIS 11 than it is now, with only a small residual ice dome over southernmost Greenland. We use the strontium-neodymium-lead isotopic composition of proglacial sediment discharged from south Greenland to constrain the provenance of terrigenous silt deposited on the Eirik Drift, a sedimentary deposit off the south Greenland margin. We identify a major reduction in sediment input derived from south Greenland's Precambrian bedrock terranes, probably reflecting the cessation of subglacial erosion and sediment transport as a result of near-complete deglaciation of south Greenland. Comparison with ice-sheet configurations from numerical models suggests that the GIS lost about 4.5 to 6 metres of sea-level-equivalent volume during MIS 11. This is evidence for late-Quaternary GIS collapse after it crossed a climate/ice-sheet stability threshold that may have been no more than several degrees above pre-industrial temperatures. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=96871535
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1038/nature13456
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 4
        StartPage: 525
    Subjects:
      – SubjectFull: Solar radiation
        Type: general
      – SubjectFull: Earth system science
        Type: general
      – SubjectFull: Quaternary paleoclimatology
        Type: general
      – SubjectFull: Oxygen isotopes
        Type: general
      – SubjectFull: Climate change
        Type: general
      – SubjectFull: Greenland Ice Sheet (Greenland)
        Type: general
    Titles:
      – TitleFull: South Greenland ice-sheet collapse during Marine Isotope Stage 11.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Reyes, Alberto V.
      – PersonEntity:
          Name:
            NameFull: Carlson, Anders E.
      – PersonEntity:
          Name:
            NameFull: Beard, Brian L.
      – PersonEntity:
          Name:
            NameFull: Hatfield, Robert G.
      – PersonEntity:
          Name:
            NameFull: Stoner, Joseph S.
      – PersonEntity:
          Name:
            NameFull: Winsor, Kelsey
      – PersonEntity:
          Name:
            NameFull: Welke, Bethany
      – PersonEntity:
          Name:
            NameFull: Ullman, David J.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 26
              M: 06
              Text: 6/26/2014
              Type: published
              Y: 2014
          Identifiers:
            – Type: issn-print
              Value: 00280836
          Numbering:
            – Type: volume
              Value: 510
            – Type: issue
              Value: 7506
          Titles:
            – TitleFull: Nature
              Type: main
ResultId 1