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.; ... (2021). Antarctic surface temperature and elevation during the Last Glacial Maximum. Science, 372(6546), pp. 1097-1101. American Association for the Advancement of Science 10.1126/science.abd2897
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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: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Physics Institute > Climate and Environmental Physics 10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR) |
UniBE Contributor: |
Sigl, Michael, Schwander, Jakob |
Subjects: |
500 Science > 530 Physics |
ISSN: |
0036-8075 |
Publisher: |
American Association for the Advancement of Science |
Funders: |
[18] European Research Council |
Projects: |
[1314] Timing of Holocene volcanic eruptions and their radiative aerosol forcing |
Language: |
English |
Submitter: |
Michael Sigl |
Date Deposited: |
26 Oct 2021 09:30 |
Last Modified: |
05 Dec 2022 15:53 |
Publisher DOI: |
10.1126/science.abd2897 |
BORIS DOI: |
10.48350/159961 |
URI: |
https://boris.unibe.ch/id/eprint/159961 |
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