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Antarctic surface temperature and elevation during the Last Glacial Maximum.

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Title: Antarctic surface temperature and elevation during the Last Glacial Maximum.
Authors: Buizert, Christo, Fudge, T. J., Roberts, William H. G., Steig, Eric J., Sherriff-Tadano, Sam, Ritz, Catherine, Lefebvre, Eric, Edwards, Jon, Kawamura, Kenji, Oyabu, Ikumi, Motoyama, Hideaki, Kahle, Emma C., Jones, Tyler R., Abe-Ouchi, Ayako, Obase, Takashi, Martin, Carlos, Corr, Hugh, Severinghaus, Jeffrey P., Beaudette, Ross, Epifanio, Jenna A.
Source: Science (pre-March 2025). 6/4/2021, Vol. 372 Issue 6546, p1097-1101. 5p. 4 Diagrams.
Subjects: Antarctic environmental conditions, Surface temperature, Last Glacial Maximum, Isotopes, Ice cores, Paleoclimatology, Temperature inversions
Abstract: Water-stable isotopes in polar ice cores are a widely used temperature proxy in paleoclimate reconstruction, yet calibration remains challenging in East Antarctica. Here, we reconstruct the magnitude and spatial pattern of Last Glacial Maximum surface cooling in Antarctica using borehole thermometry and firn properties in seven ice cores. West Antarctic sites cooled ~10°C relative to the preindustrial period. East Antarctic sites show a range from ~4° to ~7°C cooling, which is consistent with the results of global climate models when the effects of topographic changes indicated with ice core air-content data are included, but less than those indicated with the use of water-stable isotopes calibrated against modern spatial gradients. An altered Antarctic temperature inversion during the glacial reconciles our estimates with water-isotope observations. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science 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
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  Data: Antarctic surface temperature and elevation during the Last Glacial Maximum.
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  Data: <searchLink fieldCode="AR" term="%22Buizert%2C+Christo%22">Buizert, Christo</searchLink><br /><searchLink fieldCode="AR" term="%22Fudge%2C+T%2E+J%2E%22">Fudge, T. J.</searchLink><br /><searchLink fieldCode="AR" term="%22Roberts%2C+William+H%2E+G%2E%22">Roberts, William H. G.</searchLink><br /><searchLink fieldCode="AR" term="%22Steig%2C+Eric+J%2E%22">Steig, Eric J.</searchLink><br /><searchLink fieldCode="AR" term="%22Sherriff-Tadano%2C+Sam%22">Sherriff-Tadano, Sam</searchLink><br /><searchLink fieldCode="AR" term="%22Ritz%2C+Catherine%22">Ritz, Catherine</searchLink><br /><searchLink fieldCode="AR" term="%22Lefebvre%2C+Eric%22">Lefebvre, Eric</searchLink><br /><searchLink fieldCode="AR" term="%22Edwards%2C+Jon%22">Edwards, Jon</searchLink><br /><searchLink fieldCode="AR" term="%22Kawamura%2C+Kenji%22">Kawamura, Kenji</searchLink><br /><searchLink fieldCode="AR" term="%22Oyabu%2C+Ikumi%22">Oyabu, Ikumi</searchLink><br /><searchLink fieldCode="AR" term="%22Motoyama%2C+Hideaki%22">Motoyama, Hideaki</searchLink><br /><searchLink fieldCode="AR" term="%22Kahle%2C+Emma+C%2E%22">Kahle, Emma C.</searchLink><br /><searchLink fieldCode="AR" term="%22Jones%2C+Tyler+R%2E%22">Jones, Tyler R.</searchLink><br /><searchLink fieldCode="AR" term="%22Abe-Ouchi%2C+Ayako%22">Abe-Ouchi, Ayako</searchLink><br /><searchLink fieldCode="AR" term="%22Obase%2C+Takashi%22">Obase, Takashi</searchLink><br /><searchLink fieldCode="AR" term="%22Martin%2C+Carlos%22">Martin, Carlos</searchLink><br /><searchLink fieldCode="AR" term="%22Corr%2C+Hugh%22">Corr, Hugh</searchLink><br /><searchLink fieldCode="AR" term="%22Severinghaus%2C+Jeffrey+P%2E%22">Severinghaus, Jeffrey P.</searchLink><br /><searchLink fieldCode="AR" term="%22Beaudette%2C+Ross%22">Beaudette, Ross</searchLink><br /><searchLink fieldCode="AR" term="%22Epifanio%2C+Jenna+A%2E%22">Epifanio, Jenna A.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 6/4/2021, Vol. 372 Issue 6546, p1097-1101. 5p. 4 Diagrams.
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  Data: <searchLink fieldCode="DE" term="%22Antarctic+environmental+conditions%22">Antarctic environmental conditions</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+temperature%22">Surface temperature</searchLink><br /><searchLink fieldCode="DE" term="%22Last+Glacial+Maximum%22">Last Glacial Maximum</searchLink><br /><searchLink fieldCode="DE" term="%22Isotopes%22">Isotopes</searchLink><br /><searchLink fieldCode="DE" term="%22Ice+cores%22">Ice cores</searchLink><br /><searchLink fieldCode="DE" term="%22Paleoclimatology%22">Paleoclimatology</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature+inversions%22">Temperature inversions</searchLink>
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  Data: Water-stable isotopes in polar ice cores are a widely used temperature proxy in paleoclimate reconstruction, yet calibration remains challenging in East Antarctica. Here, we reconstruct the magnitude and spatial pattern of Last Glacial Maximum surface cooling in Antarctica using borehole thermometry and firn properties in seven ice cores. West Antarctic sites cooled ~10°C relative to the preindustrial period. East Antarctic sites show a range from ~4° to ~7°C cooling, which is consistent with the results of global climate models when the effects of topographic changes indicated with ice core air-content data are included, but less than those indicated with the use of water-stable isotopes calibrated against modern spatial gradients. An altered Antarctic temperature inversion during the glacial reconciles our estimates with water-isotope observations. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science 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.)
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        Value: 10.1126/science.abd2897
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        Text: English
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      – SubjectFull: Antarctic environmental conditions
        Type: general
      – SubjectFull: Surface temperature
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      – SubjectFull: Last Glacial Maximum
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      – SubjectFull: Temperature inversions
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