globalchange  > 气候减缓与适应
DOI: 10.1016/j.quascirev.2017.11.017
Scopus ID: 2-s2.0-85034447723
δ13C signal of earthworm calcite granules: A new proxy for palaeoprecipitation reconstructions during the Last Glacial in western Europe
Author: Prud'homme C.; Lécuyer C.; Antoine P.; Hatté C.; Moine O.; Fourel F.; Amiot R.; Martineau F.; Rousseau D.-D.
Source Publication: Quaternary Science Reviews
ISSN: 2773791
Publishing Year: 2018
Volume: 179
pages begin: 158
pages end: 166
Language: 英语
Keyword: Carbon stable isotopes ; Earthworm calcite granules ; Loess-palaeosol sequence ; Nussloch ; Palaeoprecipitation reconstructions
Scopus Keyword: Calcite ; Glacial geology ; Isotopes ; Landforms ; Repair ; Sediments ; Signal reconstruction ; Soils ; Carbon stable isotopes ; Continental environments ; Earthworm calcite granules ; Empirical relationships ; Loess-palaeosol sequences ; Mean annual precipitation ; Nussloch ; Stable carbon isotopes ; Granulation ; calcite ; carbon isotope ; earthworm ; isotopic fractionation ; Last Glacial ; loess ; organic matter ; paleoclimate ; paleosol ; precipitation (climatology) ; proxy climate record ; reconstruction ; stable isotope ; tundra ; Baden-Wurttemberg ; Germany ; Nussloch
English Abstract: Quantification of paleoprecipitation during the Last Glacial is a key element to reconstruct palaeoclimates. Recently, fossil calcite granules have been identified in loess sequences with high contents in specific horizons. In this study, we explored for the first time the potential of this new bio-indicator as a climatic proxy for precipitation in western Europe during the Last Glacial. We extracted 30 granules from eleven samples belonging to three tundra gleys and two brown soils from the Nussloch loess sequence previously dated between 50 and 20 ka. Stable carbon isotope measurements were performed on each granule and duplicated. Throughout the studied section, δ13C values range from −15.4 to −10.3‰ for tundra gleys and from −14.9 to −9.5‰ for brown soils. By taking into account the fractionation factor between the carbon ingested by the earthworm and the carbon output of the granules, the δ13C values of these granules reflect the composition of the C3 plant vegetation cover. Thus, we estimated the δ13C of the plants with a mean value of −24.3 ± 0.9‰ for tundra gleys and −24.1 ± 0.9‰ for brown soils, which are in agreement with values obtained from organic matter preserved in sediments. Palaeoprecipitation range over both tundra gley horizons and brown soils were estimated at about 333[159–574] mm/yr by using an empirical relationship determined between present-day plant leaf isotopic discrimination and the mean annual precipitation. This original preliminary study highlights the potential of earthworm calcite granule δ13C measurements as a new proxy for paleoprecipitation during the Last Glacial interstadials in continental environments. © 2017 Elsevier Ltd
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被引频次[WOS]:2   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Appears in Collections:气候减缓与适应

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Affiliation: Laboratoire de Géographie Physique, Environnements Quaternaires et Actuels (LGP), UMR 8591 CNRS-Université Paris 1-UPEC, 1 place Aristide Briand, Meudon Cedex, 92195, France; Laboratoire de Géologie de Lyon (LGL–TPE), UMR CNRS 5276, Université Claude Bernard Lyon 1, 2 Rue Raphaël Dubois, Villeurbanne Cedex, 69622, France; Laboratoire des Sciences du Climat et de l'Environnement, UMR CEA-CNRS-UVSQ 8212, Université Paris Saclay, Gif-sur-Yvette Cedex, 91198, France; Laboratoire de Météorologie Dynamique, UMR CNRS 6539, PSL Research University, CERES-ERTI, 24 Rue Lhomond, Paris, 75231, France; Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, United States; Research Group for Terrestrial Palaeoclimates, Max Planck Institute for Chemistry, Hahn-Meitner-Weg 1, Mainz, 55128, Germany

Recommended Citation:
Prud'homme C.,Lécuyer C.,Antoine P.,et al. δ13C signal of earthworm calcite granules: A new proxy for palaeoprecipitation reconstructions during the Last Glacial in western Europe[J]. Quaternary Science Reviews,2018-01-01,179
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