气候变化领域集成服务门户(CCPortal): Alluvial record of an early Eocene hyperthermal within the Castissent Formation; the Pyrenees; Spain

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DOI	10.5194/cp-16-227-2020
	Alluvial record of an early Eocene hyperthermal within the Castissent Formation; the Pyrenees; Spain
	Honegger L.; Adatte T.; Spangenberg J.E.; Caves Rugenstein J.K.; Poyatos-Moré M.; Puigdefàbregas C.; Chanvry E.; Clark J.; Fildani A.; Verrechia E.; Kouzmanov K.; Harlaux M.; Castelltort S.
发表日期	2020
ISSN	18149324
起始页码	227
结束页码	243
卷号	16 期号:1
英文摘要	The late Palaeocene to the middle Eocene (57.5 to 46.5 Ma) recorded a total of 39 hyperthermals-periods of rapid global warming documented by prominent negative carbon isotope excursions (CIEs) as well as peaks in iron content-have been recognized in marine cores. Documenting how the Earth system responded to rapid climatic shifts during hyperthermals provides fundamental information to constrain climatic models. However, while hyperthermals have been well documented in the marine sedimentary record, only a few have been recognized and described in continental deposits, thereby limiting our ability to understand the effect and record of global warming on terrestrial systems. Hyperthermals in the continental record could be a powerful correlation tool to help connect marine and continental deposits, addressing issues of environmental signal propagation from land to sea. In this study, we generate new stable carbon isotope data (δ13C values) across the wellexposed and time-constrained fluvial sedimentary succession of the early Eocene Castissent Formation in the south central Pyrenees (Spain). The δ13C values of pedogenic carbonate reveal-similarly to the global records-stepped CIEs, culminating in a minimum δ13C value that we correlate with the hyperthermal event "U" at ca. 50 Ma. This general trend towards more negative values is most probably linked to higher primary productivity leading to an overall higher respiration of soil organic matter during these climatic events. The relative enrichment in immobile elements (Zr, Ti, Al) and higher estimates of mean annual precipitation together with the occurrence of small iron oxide and iron hydroxide nodules during the CIEs suggest intensification of chemical weathering and/or longer exposure of soils in a highly seasonal climate. The results show that even relatively small-scale hyperthermals compared with their prominent counterparts, such as PETM, ETM2, and ETM3, can leave a recognizable signature in the terrestrial stratigraphic record, providing insights into the dynamics of the carbon cycle in continental environments during these events. © 2020 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	carbon cycle; carbon isotope; chemical weathering; Eocene; global warming; marine sediment; Paleocene; Paleocene-Eocene boundary; precipitation (chemistry); soil respiration; Pyrenees; Spain
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/146748
作者单位	Department of Earth Sciences, University of Geneva, Rue des Maraîchers 13, Geneva, 1205, Switzerland; Institut of Earth Sciences, Géopolis, University of Lausanne, Lausanne, 1015, Switzerland; Institute of Earth Surface Dynamics (IDYST), Géopolis, University of Lausanne, Lausanne, 1015, Switzerland; Land in the Earth System Department, Max Planck Institute for Meteorology, Bundesstraße 53, Hamburg, 20146, Germany; Department of Geosciences, University of Oslo, Sem Sælands vei 1, Oslo, 0371, Norway; Department of Earth and Ocean Dynamics, University of Barcelona, C/Martí i Franquès, s/n, Barcelona, 08028, Spain; IC2MP UMR 7285, Université de Poitiers, Poitiers, 86000, France; Equinor Research Center, 6300 Bridge Point Parkway, Building 2, Austin, TX, United States
推荐引用方式 GB/T 7714	Honegger L.,Adatte T.,Spangenberg J.E.,et al. Alluvial record of an early Eocene hyperthermal within the Castissent Formation; the Pyrenees; Spain[J],2020,16(1).
APA	Honegger L..,Adatte T..,Spangenberg J.E..,Caves Rugenstein J.K..,Poyatos-Moré M..,...&Castelltort S..(2020).Alluvial record of an early Eocene hyperthermal within the Castissent Formation; the Pyrenees; Spain.Climate of the Past,16(1).
MLA	Honegger L.,et al."Alluvial record of an early Eocene hyperthermal within the Castissent Formation; the Pyrenees; Spain".Climate of the Past 16.1(2020).