Antarctic surface temperature and elevation during the Last Glacial Maximum

doi:10.1126/science.abd2897

GSTDTAP > 气候变化

DOI	10.1126/science.abd2897
	Antarctic surface temperature and elevation during the Last Glacial Maximum
	Christo Buizert; T. J. Fudge; William H. G. Roberts; Eric J. Steig; Sam Sherriff-Tadano; Catherine Ritz; Eric Lefebvre; Jon Edwards; Kenji Kawamura; Ikumi Oyabu; Hideaki Motoyama; Emma C. Kahle; Tyler R. Jones; Ayako Abe-Ouchi; Takashi Obase; Carlos Martin; Hugh Corr; Jeffrey P. Severinghaus; Ross Beaudette; Jenna A. Epifanio; Edward J. Brook; Kaden Martin; Jérôme Chappellaz; Shuji Aoki; Takakiyo Nakazawa; Todd A. Sowers; Richard B. Alley; Jinho Ahn; Michael Sigl; Mirko Severi; Nelia W. Dunbar; Anders Svensson; John M. Fegyveresi; Chengfei He; Zhengyu Liu; Jiang Zhu; Bette L. Otto-Bliesner; Vladimir Y. Lipenkov; Masa Kageyama; Jakob Schwander
	2021-06-04
发表期刊	Science
出版年	2021
英文摘要	It has been widely thought that East Antarctica was ∼9°C cooler during the Last Glacial Maximum, close to the ∼10°C difference between then and now determined independently for West Antarctica. Buizert et al. used borehole thermometry, firn density reconstructions, and climate modeling to show that the temperature in East Antarctica was actually only ∼4° to 7°C cooler during the Last Glacial Maximum. This result has important consequences for our understanding of Antarctic climate, polar amplification, and global climate change. Science , abd2897, this issue p. [1097][1] 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. [1]: /lookup/doi/10.1126/science.abd2897
领域	气候变化 ; 资源环境
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/329877
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Christo Buizert,T. J. Fudge,William H. G. Roberts,et al. Antarctic surface temperature and elevation during the Last Glacial Maximum[J]. Science,2021.
APA	Christo Buizert.,T. J. Fudge.,William H. G. Roberts.,Eric J. Steig.,Sam Sherriff-Tadano.,...&Jakob Schwander.(2021).Antarctic surface temperature and elevation during the Last Glacial Maximum.Science.
MLA	Christo Buizert,et al."Antarctic surface temperature and elevation during the Last Glacial Maximum".Science (2021).