气候变化领域集成服务门户(CCPortal): The Norwegian-Greenland Sea, the Laschamps, and the Mono Lake Excursions Recorded in a Black Sea Sedimentary Sequence Spanning From 68.9 to 14.5 ka

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DOI	10.1029/2019JB019225
	The Norwegian-Greenland Sea, the Laschamps, and the Mono Lake Excursions Recorded in a Black Sea Sedimentary Sequence Spanning From 68.9 to 14.5 ka
	Liu J.; Nowaczyk N.R.; Panovska S.; Korte M.; Arz H.W.
发表日期	2020
ISSN	21699313
卷号	125 期号:8
英文摘要	A full-vector paleomagnetic record, comprising directional data and relative paleointensity (rPI), was derived from 16 sediment cores recovered from the southeastern Black Sea. The obtained data were used to create a stack covering the time window between 68.9 and 14.5 ka. Age models are based on radiocarbon dating and correlations of warming/cooling cycles monitored by high-resolution X-ray fluorescence (XRF) elementary ratios and by ice-rafted debris (IRD) in Black Sea sediments to the sequence of “Dansgaard-Oeschger” (D-O) events defined from the Greenland ice core oxygen isotope stratigraphy. The reconstructed prominent lows in paleointensity at about 64.5, 41.2, and 34.5 ka are coeval with the Norwegian-Greenland Sea, the Laschamps, and the Mono Lake excursions, respectively. For a further analysis, the stacked Black Sea paleomagnetic record was converted into one component being parallel to the direction expected from a geocentric axial dipole (GAD) and two components perpendicular to it (EW, inclined NS), representing definitely only non-GAD components of the geomagnetic field. Discussions of the field configurations at the Black Sea site are focused on the three excursional events. The Norwegian-Greenland Sea excursion was dominated by a decaying axial dipole and persisting weak nondipole field, with directional variations still within the range of normal secular variations. The Laschamps excursion comprises two full polarity transitions and a short stable interval of reversed polarity in between. The Mono Lake excursion was mostly dominated by a nondipole field, though with a less pronounced weakening of the axial dipole component. ©2020 The Authors.
英文关键词	Black Sea; Laschamps excursion; Mono Lake excursion; Norwegian-Greenland Sea excursion; paleosecular variations
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187707
作者单位	GFZ German Research Centre for Geosciences, Section 4.3, Helmholtz Centre Potsdam, Potsdam, Germany; Now at Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen, China; GFZ German Research Centre for Geosciences, Section 2.3, Helmholtz Centre Potsdam, Potsdam, Germany; Leibniz Institute for Baltic Sea Research Warnemünde, Rostock, Germany
推荐引用方式 GB/T 7714	Liu J.,Nowaczyk N.R.,Panovska S.,et al. The Norwegian-Greenland Sea, the Laschamps, and the Mono Lake Excursions Recorded in a Black Sea Sedimentary Sequence Spanning From 68.9 to 14.5 ka[J],2020,125(8).
APA	Liu J.,Nowaczyk N.R.,Panovska S.,Korte M.,&Arz H.W..(2020).The Norwegian-Greenland Sea, the Laschamps, and the Mono Lake Excursions Recorded in a Black Sea Sedimentary Sequence Spanning From 68.9 to 14.5 ka.Journal of Geophysical Research: Solid Earth,125(8).
MLA	Liu J.,et al."The Norwegian-Greenland Sea, the Laschamps, and the Mono Lake Excursions Recorded in a Black Sea Sedimentary Sequence Spanning From 68.9 to 14.5 ka".Journal of Geophysical Research: Solid Earth 125.8(2020).