气候变化领域集成服务门户(CCPortal): Southern Ocean upwelling, Earth's obliquity, and glacial-interglacial atmospheric CO2 change

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DOI	10.1126/science.abd2115
	Southern Ocean upwelling, Earth's obliquity, and glacial-interglacial atmospheric CO2 change
	Ai X.E.; Studer A.S.; Sigman D.M.; Martínez-García A.; Fripiat F.; Thöle L.M.; Michel E.; Gottschalk J.; Arnold L.; Moretti S.; Schmitt M.; Oleynik S.; Jaccard S.L.; Haug G.H.
发表日期	2020
ISSN	0036-8075
起始页码	1348
结束页码	1352
卷号	370 期号:6522
英文摘要	Previous studies have suggested that during the late Pleistocene ice ages, surface-deep exchange was somehow weakened in the Southern Ocean's Antarctic Zone, which reduced the leakage of deeply sequestered carbon dioxide and thus contributed to the lower atmospheric carbon dioxide levels of the ice ages. Here, high-resolution diatom-bound nitrogen isotope measurements from the Indian sector of the Antarctic Zone reveal three modes of change in Southern Westerly Wind-driven upwelling, each affecting atmospheric carbon dioxide. Two modes, related to global climate and the bipolar seesaw, have been proposed previously. The third mode-which arises from the meridional temperature gradient as affected by Earth's obliquity (axial tilt)-can explain the lag of atmospheric carbon dioxide behind climate during glacial inception and deglaciation. This obliquity-induced lag, in turn, makes carbon dioxide a delayed climate amplifier in the late Pleistocene glacial cycles. © 2020 American Association for the Advancement of Science. All rights reserved.
英文关键词	carbon dioxide; nitrogen 15; carbon dioxide; deglaciation; glacial-interglacial cycle; global climate; nitrogen isotope; obliquity; Pleistocene; upwelling; Antarctica; Article; astronomy; atmosphere; carbon footprint; climate change; deglaciation; Earth obliquity; glaciation; greenhouse effect; paleoclimate; priority journal; seawater upwelling; Southern Ocean; Upper Pleistocene; Indian Ocean; Southern Ocean; Bacillariophyta
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/242783
作者单位	Department of Geosciences, Princeton University, Princeton, NJ 08544, United States; Climate Geochemistry Department, Max Planck Institute for Chemistry, Mainz, 55128, Germany; Department of Environmental Sciences, University of Basel, Basel, Switzerland; Department of Geosciences Environment and Society, Université Libre de Bruxelles, Brussels, Belgium; Institute of Geological Sciences, Oeschger Center for Climate Change Research, University of Bern, Bern, Switzerland; Department of Earth Sciences, Utrecht University, Utrecht, Netherlands; Laboratoire des Sciences du Climat et de l'Environnement (LSCE), Laboratoire CNRS-CEA-UVSQ, Gif-sur- Yvette, France; Lamont-Doherty Earth Observatory, Palisades, NY 10964, United States; Department of Earth Sciences, ETH Zürich, Zürich, Switzerland
推荐引用方式 GB/T 7714	Ai X.E.,Studer A.S.,Sigman D.M.,et al. Southern Ocean upwelling, Earth's obliquity, and glacial-interglacial atmospheric CO2 change[J],2020,370(6522).
APA	Ai X.E..,Studer A.S..,Sigman D.M..,Martínez-García A..,Fripiat F..,...&Haug G.H..(2020).Southern Ocean upwelling, Earth's obliquity, and glacial-interglacial atmospheric CO2 change.Science,370(6522).
MLA	Ai X.E.,et al."Southern Ocean upwelling, Earth's obliquity, and glacial-interglacial atmospheric CO2 change".Science 370.6522(2020).