Antarctic surface temperature and elevation during the Last Glacial Maximum.

Autor: Buizert C; College of Earth Ocean and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, USA. christo.buizert@oregonstate.edu., Fudge TJ; Department of Earth and Space Science, University of Washington, Seattle, WA 98195, USA., Roberts WHG; Geographical and Environmental Sciences, Northumbria University, Newcastle, UK., Steig EJ; Department of Earth and Space Science, University of Washington, Seattle, WA 98195, USA., Sherriff-Tadano S; Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa 277-8568, Japan., Ritz C; Université Grenoble Alpes, CNRS, IRD, IGE, Grenoble, France., Lefebvre E; Université Grenoble Alpes, CNRS, IRD, IGE, Grenoble, France., Edwards J; College of Earth Ocean and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, USA., Kawamura K; National Institute of Polar Research, Tachikawa, Tokyo, Japan.; Department of Polar Science, The Graduate University of Advanced Studies (SOKENDAI), Tokyo, Japan.; Japan Agency for Marine Science and Technology (JAMSTEC), Yokosuka, Japan., Oyabu I; National Institute of Polar Research, Tachikawa, Tokyo, Japan., Motoyama H; National Institute of Polar Research, Tachikawa, Tokyo, Japan., Kahle EC; Department of Earth and Space Science, University of Washington, Seattle, WA 98195, USA., Jones TR; Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO 80309, USA., Abe-Ouchi A; Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa 277-8568, Japan., Obase T; Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa 277-8568, Japan., Martin C; British Antarctic Survey, Cambridge, UK., Corr H; British Antarctic Survey, Cambridge, UK., Severinghaus JP; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093, USA., Beaudette R; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093, USA., Epifanio JA; College of Earth Ocean and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, USA., Brook EJ; College of Earth Ocean and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, USA., Martin K; College of Earth Ocean and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, USA., Chappellaz J; Université Grenoble Alpes, CNRS, IRD, IGE, Grenoble, France., Aoki S; Center for Atmospheric and Oceanic Studies, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan., Nakazawa T; Center for Atmospheric and Oceanic Studies, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan., Sowers TA; School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, South Korea., Alley RB; The Earth and Environmental Systems Institute, Pennsylvania State University, University Park, PA 16802, USA., Ahn J; School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, South Korea., Sigl M; Climate and Environmental Physics, Physics Institute & Oeschger Center for Climate Change Research, University of Bern, 3012 Bern, Switzerland., Severi M; Department of Chemistry 'Ugo Schiff,' University of Florence, Florence, Italy.; Institute of Polar Sciences, ISP-CNR, Venice-Mestre, Italy., Dunbar NW; New Mexico Bureau of Geology & Mineral Resources, Earth and Environmental Science Department, New Mexico Tech, Socorro, NM 87801, USA., Svensson A; Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark., Fegyveresi JM; School of Earth and Sustainability, Northern Arizona University, Flagstaff, AZ 86011, USA., He C; Department of Geography, Ohio State University, Columbus, OH 43210, USA., Liu Z; Department of Geography, Ohio State University, Columbus, OH 43210, USA., Zhu J; National Center for Atmospheric Research, Boulder, CO 80307, USA., Otto-Bliesner BL; National Center for Atmospheric Research, Boulder, CO 80307, USA., Lipenkov VY; Climate and Environmental Research Laboratory, Arctic and Antarctic Research Institute, St. Petersburg 199397, Russia., Kageyama M; Laboratoire des Sciences du Climat et de l'Environnement-IPSL, Université Paris-Saclay, Gif-sur-Yvette, France., Schwander J; Climate and Environmental Physics, Physics Institute & Oeschger Center for Climate Change Research, University of Bern, 3012 Bern, Switzerland.
Jazyk: angličtina
Zdroj: Science (New York, N.Y.) [Science] 2021 Jun 04; Vol. 372 (6546), pp. 1097-1101.
DOI: 10.1126/science.abd2897
Abstrakt: 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.
(Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.)
Databáze: MEDLINE
Externí odkaz: