Antarctic surface temperature and elevation during the Last Glacial Maximum

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 ORCID: https://orcid.org/0000-0002-2661-169X; Corr, Hugh; Severinghaus, Jeffrey P.; Beaudette, Ross; Epifanio, Jenna A.; Brook, Edward J.; Martin, Kaden; Chappellaz, Jérôme; Aoki, Shuji; Nakazawa, Takakiyo; Sowers, Todd A.; Alley, Richard B.; Ahn, Jinho; Sigl, Michael; Severi, Mirko; Dunbar, Nelia W.; Svensson, Anders; Fegyveresi, John; He, Chengfei; Liu, Zhengyu; Zhu, Jiang; Otto-Bliesner, Bette; Lipenkov, Vladimir Y.; Kageyama, Masa; Schwander, Jakob. 2021 Antarctic surface temperature and elevation during the Last Glacial Maximum. Science, 372 (6546). 1097-1101. 10.1126/science.abd2897

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Official URL: https://science.sciencemag.org/content/372/6546/10...

Abstract/Summary

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.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1126/science.abd2897
ISSN:	00368075
Date made live:	04 Jun 2021 07:18 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/530105

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1126/science.abd2897

ISSN:

00368075

Date made live:

04 Jun 2021 07:18 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/530105