气候变化领域集成服务门户(CCPortal): Paleoenvironmental response of midlatitudinal wetlands to Paleocene-early Eocene climate change (Schöningen lignite deposits; Germany)

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DOI	10.5194/cp-15-1741-2019
	Paleoenvironmental response of midlatitudinal wetlands to Paleocene-early Eocene climate change (Schöningen lignite deposits; Germany)
	Methner K.; Lenz O.; Riegel W.; Wilde V.; Mulch A.
发表日期	2019
ISSN	18149324
起始页码	1741
结束页码	1755
卷号	15 期号:5
英文摘要	The early Paleogene is marked by multiple negative carbon isotope excursions (CIEs) that reflect massive short-term carbon cycle perturbations that coincide with significant warming during a high-pCO2 world, affecting both marine and terrestrial ecosystems. Records of such hyperthermals from the marine-terrestrial interface (e.g., estuarine swamps and mire deposits) are therefore of great interest as their present-day counterparts are highly vulnerable to future climate and sea level change. Here, we assess paleoenvironmental changes of midlatitudinal late Paleocene-early Eocene peat mire records along the paleo-North Sea coast. We provide carbon isotope data of bulk organic matter (Î13CTOC), organic carbon content (%TOC), and palynological data from an extensive peat mire deposited at a midlatitudinal (ca. 41ĝ N) coastal site (Schöningen, Germany). The Î13CTOC data show a carbon isotope excursion of -1.3 ‰ (mean decrease in Î13CTOC; -1.7 ‰ at the onset of CIE) coeval with a conspicuous Apectodinium acme. Due to the exceptionally large stratigraphic thickness of the CIE at Schöningen (10 m of section) we established a detailed palynological record that indicates only minor changes in paleovegetation leading into and during this event. Instead, paleovegetation changes mostly follow natural successions in response to changes along the marine-terrestrial interface. The available age constraints for the Schöningen Formation hamper a solid assignment of the detected CIE to a particular hyperthermal such as the Paleocene-Eocene Thermal Maximum (PETM) or any succeeding hyperthermal event such as the Eocene Thermal Maximum 2 (ETM2). Compared to other nearby peat mire records (Cobham, UK; Vasterival, F) it appears that wetland deposits around the Paleogene North Sea have a consistent CIE magnitude of ca. -1.3 ‰ in Î13CTOC. Moreover, the Schöningen record shares major characteristics with the Cobham Lignite PETM record, including evidence for increased fire activity prior to the CIE, minor plant species change during the hyperthermal, a reduced CIE in Î13CTOC, and drowning of the mire (marine ingressions) during much of the Schöningen CIE event. This suggests that either the Schöningen CIE reflects the PETM or that early Paleogene hyperthermals similarly affected paleoenvironmental conditions of a major segment of the paleo-North Sea coast. © Author(s) 2019. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	carbon isotope; climate variation; environmental response; lignite; midlatitude environment; mire; organic carbon; Paleocene-Eocene boundary; paleoenvironment; thermal maturity; wetland; Atlantic Ocean; Cobham; England; Kent; North Sea; United Kingdom
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146777
作者单位	Senckenberg Biodiversity and Climate Research Centre, Frankfurt am Main, 60325, Germany; Senckenberg Research Institute and Natural History Museum Frankfurt, Frankfurt am Main, 60325, Germany; Institute of Geosciences, Goethe University Frankfurt, Frankfurt am Main, 60438, Germany
推荐引用方式 GB/T 7714	Methner K.,Lenz O.,Riegel W.,et al. Paleoenvironmental response of midlatitudinal wetlands to Paleocene-early Eocene climate change (Schöningen lignite deposits; Germany)[J],2019,15(5).
APA	Methner K.,Lenz O.,Riegel W.,Wilde V.,&Mulch A..(2019).Paleoenvironmental response of midlatitudinal wetlands to Paleocene-early Eocene climate change (Schöningen lignite deposits; Germany).Climate of the Past,15(5).
MLA	Methner K.,et al."Paleoenvironmental response of midlatitudinal wetlands to Paleocene-early Eocene climate change (Schöningen lignite deposits; Germany)".Climate of the Past 15.5(2019).