气候变化领域集成服务门户(CCPortal): Independent tephrochronological evidence for rapid and synchronous oceanic and atmospheric temperature rises over the Greenland stadial-interstadial transitions between ca. 32 and 40 ka b2k

CCPortal

DOI	10.1016/j.quascirev.2020.106277
	Independent tephrochronological evidence for rapid and synchronous oceanic and atmospheric temperature rises over the Greenland stadial-interstadial transitions between ca. 32 and 40 ka b2k
	Berben S.M.P.; Dokken T.M.; Abbott P.M.; Cook E.; Sadatzki H.; Simon M.H.; Jansen E.
发表日期	2020
ISSN	0277-3791
卷号	236
英文摘要	Understanding the dynamics that drove past abrupt climate changes, such as the Dansgaard-Oeschger (DO) events, depends on combined proxy evidence from disparate archives. To identify leads, lags and synchronicity between different climate system components, independent and robust chronologies are required. Cryptotephrochronology is a key geochronological tool as cryptotephra horizons can act as isochrons linking disparate and/or distant records. Here, we investigated marine sediment core MD99-2284 from the Norwegian Sea to look for previously identified Greenland ice core cryptotephra horizons and define time-parallel markers between the archives. We explored potential secondary transport and depositional mechanisms that could hamper the isochronous integrity of such horizons. We identified six cryptotephra layers of which four correlate to previously known Greenland ice core horizons. None of those were identified in other marine cores and thus, this study contributes greatly to the North Atlantic tephra framework tripling the original amount of existing isochrons between ca. 25 and 60 ka b2k. The latter allow a synchronization between MD99-2284 and the Greenland ice cores between ca. 32–40 ka b2k, which is, in the North Atlantic, the shortest time-interval during the Last Glacial Period to be constrained by four independent tephra isochrons. These findings provide essential tephra-based evidence for synchronous and rapid oceanic and atmospheric temperature rises during the Greenland Stadial-Interstadial transitions. Furthermore, it enables us to estimate the average peak-duration of interstadial temperature overshoots at approximately 136 years. As such, this well-targeted high-resolution investigation successfully demonstrates the use of cryptotephra for geochronological purposes in the marine realm. © 2020 The Author(s)
英文关键词	Cryptotephrochronology; DO-Events; Ice cores; Marine cores; North Atlantic; Paleoceanography; Paleoclimatology; Quaternary; Sedimentology; Synchronization
语种	英语
scopus关键词	Atmospheric thermodynamics; Climate change; Geochronology; Ice; Sedimentology; Submarine geology; Synchronization; Cryptotephrochronology; DO-Events; Ice core; Marine cores; North Atlantic; Paleoceanography; Paleoclimatology; Quaternary; Atmospheric temperature; air temperature; geochronology; ice core; interstadial; Last Glacial; marine sediment; paleoceanography; paleoclimate; sediment core; sedimentology; tephra; tephrochronology; Arctic; Arctic Ocean; Atlantic Ocean; Atlantic Ocean (North); Greenland; Norwegian Sea
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151498
作者单位	Department of Earth Science and Bjerknes Centre for Climate Research, University of Bergen, Bergen, 5007, Norway; NORCE Norwegian Research Centre and Bjerknes Centre for Climate Research, Bergen, 5007, Norway; School of Earth and Ocean Sciences, Cardiff University, Cardiff, CF10 3AT, United Kingdom; Institute of Geological Sciences and Oeschger Center for Climate Research, University of Bern, Bern, 3012, Switzerland; Physics of Ice, Climate and Earth, Niels Bohr Institute, University of Copenhagen, Copenhagen, 2200, Denmark; Research School of Earth Sciences, Australian National University, Canberra, ACT 2601, Australia
推荐引用方式 GB/T 7714	Berben S.M.P.,Dokken T.M.,Abbott P.M.,et al. Independent tephrochronological evidence for rapid and synchronous oceanic and atmospheric temperature rises over the Greenland stadial-interstadial transitions between ca. 32 and 40 ka b2k[J],2020,236.
APA	Berben S.M.P..,Dokken T.M..,Abbott P.M..,Cook E..,Sadatzki H..,...&Jansen E..(2020).Independent tephrochronological evidence for rapid and synchronous oceanic and atmospheric temperature rises over the Greenland stadial-interstadial transitions between ca. 32 and 40 ka b2k.Quaternary Science Reviews,236.
MLA	Berben S.M.P.,et al."Independent tephrochronological evidence for rapid and synchronous oceanic and atmospheric temperature rises over the Greenland stadial-interstadial transitions between ca. 32 and 40 ka b2k".Quaternary Science Reviews 236(2020).