气候变化领域集成服务门户(CCPortal): A global environmental crisis 42,000 years ago

CCPortal

DOI	10.1126/science.abb8677
	A global environmental crisis 42,000 years ago
	Cooper A.; Turney C.S.M.; Palmer J.; Hogg A.; McGlone M.; Wilmshurst J.; Lorrey A.M.; Heaton T.J.; Russell J.M.; McCracken K.; Anet J.G.; Rozanov E.; Friedel M.; Suter I.; Peter T.; Muscheler R.; Adolphi F.; Dosseto A.; Tyler Faith J.; Fenwick P.; Fogwill C.J.; Hughen K.; Lipson M.; Liu J.; Nowaczyk N.; Rainsley E.; Ramsey C.B.; Sebastianelli P.; Souilmi Y.; Stevenson J.; Thomas Z.; Tobler R.; Zech R.
发表日期	2021
ISSN	0036-8075
起始页码	811
结束页码	818
卷号	371 期号:6531
英文摘要	Geological archives record multiple reversals of Earth’s magnetic poles, but the global impacts of these events, if any, remain unclear. Uncertain radiocarbon calibration has limited investigation of the potential effects of the last major magnetic inversion, known as the Laschamps Excursion [41 to 42 thousand years ago (ka)]. We use ancient New Zealand kauri trees (Agathis australis) to develop a detailed record of atmospheric radiocarbon levels across the Laschamps Excursion. We precisely characterize the geomagnetic reversal and perform global chemistry-climate modeling and detailed radiocarbon dating of paleoenvironmental records to investigate impacts. We find that geomagnetic field minima ~42 ka, in combination with Grand Solar Minima, caused substantial changes in atmospheric ozone concentration and circulation, driving synchronous global climate shifts that caused major environmental changes, extinction events, and transformations in the archaeological record. © 2021 American Association for the Advancement of Science. All rights reserved.
英文关键词	ozone; calibration; climate modeling; geomagnetic field; global climate; magnetic reversal; radiocarbon dating; archeology; Article; climate; environmental aspects and related phenomena; environmental change; environmental impact; environmental management; environmental monitoring; environmental surveillance; geography; human; magnetic field; nonhuman; radiation measurement; New Zealand; Agathis australis
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/243387
作者单位	South Australian Museum, Adelaide, SA 5000, Australia; BlueSky Genetics, PO Box 287, Adelaide, SA 5137, Australia; Chronos 14Carbon-Cycle Facility, Earth and Sustainability Science Research Centre, University of New South Wales, Sydney, NSW 2052, Australia; Radiocarbon Dating Laboratory, University of Waikato, Hamilton, 3240, New Zealand; Landcare Research, PO Box 69040, Lincoln, New Zealand; School of Environment, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand; National Institute of Water and Atmospheric Research Ltd, Auckland, 1010, New Zealand; School of Mathematics and Statistics, University of Sheffield, Sheffield, S3 7RH, United Kingdom; Department of Geological Sciences, Brown University, Providence, RI 02912, United States; University of New South Wales, Sydney, NSW 2052, Australia; Zurich University of Applied Sciences, Centre for Aviation, Winterthur, 8401, Switzerland; Institute for Atmospheric and Climatic Science, ETH Zurich, Zurich, 8006, Switzerland; Physikalisc...
推荐引用方式 GB/T 7714	Cooper A.,Turney C.S.M.,Palmer J.,et al. A global environmental crisis 42,000 years ago[J],2021,371(6531).
APA	Cooper A..,Turney C.S.M..,Palmer J..,Hogg A..,McGlone M..,...&Zech R..(2021).A global environmental crisis 42,000 years ago.Science,371(6531).
MLA	Cooper A.,et al."A global environmental crisis 42,000 years ago".Science 371.6531(2021).