globalchange  > 影响、适应和脆弱性
DOI: 10.5194/cp-14-397-2018
Scopus记录号: 2-s2.0-85044416324
论文题名:
Land-sea coupling of early Pleistocene glacial cycles in the southern North Sea exhibit dominant Northern Hemisphere forcing
作者: Donders T.H.; Van Helmond N.A.G.M.; Verreussel R.; Munsterman D.; Veen J.T.; Speijer R.P.; Weijers J.W.H.; Sangiorgi F.; Peterse F.; Reichart G.-J.; Damsté J.S.S.; Lourens L.; Kuhlmann G.; Brinkhuis H.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2018
卷: 14, 期:3
起始页码: 397
结束页码: 411
语种: 英语
Scopus关键词: catchment ; climate forcing ; climate signal ; cooling ; dinoflagellate cyst ; glacial-interglacial cycle ; glaciation ; historical record ; isotopic analysis ; land-sea interaction ; marine isotope stage ; meridional circulation ; Northern Hemisphere ; oxygen isotope ; paleoenvironment ; Pleistocene ; proxy climate record ; reconstruction ; river flow ; sea level change ; sea surface temperature ; sediment transport ; sequence stratigraphy ; water column ; Atlantic Ocean ; Europe ; North Sea ; Dinophyceae
英文摘要: We assess the disputed phase relations between forcing and climatic response in the early Pleistocene with a spliced Gelasian (ĝ1/4 2.6-1.8ĝ€Ma) multi-proxy record from the southern North Sea basin. The cored sections couple climate evolution on both land and sea during the intensification of Northern Hemisphere glaciation (NHG) in NW Europe, providing the first well-constrained stratigraphic sequence of the classic terrestrial Praetiglian stage. Terrestrial signals were derived from the Eridanos paleoriver, a major fluvial system that contributed a large amount of freshwater to the northeast Atlantic. Due to its latitudinal position, the Eridanos catchment was likely affected by early Pleistocene NHG, leading to intermittent shutdown and reactivation of river flow and sediment transport. Here we apply organic geochemistry, palynology, carbonate isotope geochemistry, and seismostratigraphy to document both vegetation changes in the Eridanos catchment and regional surface water conditions and relate them to early Pleistocene glacial-interglacial cycles and relative sea level changes. Paleomagnetic and palynological data provide a solid integrated timeframe that ties the obliquity cycles, expressed in the borehole geophysical logs, to Marine Isotope Stages (MIS) 103 to 92, independently confirmed by a local benthic oxygen isotope record. Marine and terrestrial palynological and organic geochemical records provide high-resolution reconstructions of relative terrestrial and sea surface temperature (TT and SST), vegetation, relative sea level, and coastal influence.

During the prominent cold stages MIS 98 and 96, as well as 94, the record indicates increased non-Arboreal vegetation, low SST and TT, and low relative sea level. During the warm stages MIS 99, 97, and 95 we infer increased stratification of the water column together with a higher percentage of arboreal vegetation, high SST, and relative sea level maxima. The early Pleistocene distinct warm-cold alterations are synchronous between land and sea, but lead the relative sea level change by 3000-8000 years. The record provides evidence for a dominantly Northern Hemisphere-driven cooling that leads the glacial buildup and varies on the obliquity timescale. Southward migration of Arctic surface water masses during glacials, indicated by cool-water dinoflagellate cyst assemblages, is furthermore relevant for the discussion on the relation between the intensity of the Atlantic meridional overturning circulation and ice sheet growth. © 2018 Author(s).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109580
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Department of Physical Geography, Faculty of Geosciences, Utrecht University, Heidelberglaan 2, Utrecht, 3584 CD, Netherlands; TNO-Applied Geosciences, Netherlands Organisation of Applied Scientific Research Princetonlaan 6, Utrecht, 3584, Netherlands; Department of Earth Sciences, Faculty of Geosciences, Utrecht University, Heidelberglaan 2, Utrecht, 3584, Netherlands; TNO-Geological Survey of the Netherlands, Netherlands Organisation of Applied Scientific Research, Princetonlaan 6, Utrecht, 3584, Netherlands; Department of Earth and Environmental Sciences, KU Leuven Heverlee, 3001, Belgium; NIOZ Royal Netherlands Institute for Sea Research, Den Burg, Texel, 1790 AB, Netherlands; BGR-Federal Institute for Geosciences and Natural Resources, Geozentrum Hannover, Stilleweg 2, D-Hanover, 30655, Germany; Shell Global Solutions International B.V., Grasweg 31, Amsterdam, 1031 HW, Netherlands

Recommended Citation:
Donders T.H.,Van Helmond N.A.G.M.,Verreussel R.,et al. Land-sea coupling of early Pleistocene glacial cycles in the southern North Sea exhibit dominant Northern Hemisphere forcing[J]. Climate of the Past,2018-01-01,14(3)
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