230 Th Normalization: New Insights on an Essential Tool for Quantifying Sedimentary Fluxes in the Modern and Quaternary Ocean
| العنوان: | 230 Th Normalization: New Insights on an Essential Tool for Quantifying Sedimentary Fluxes in the Modern and Quaternary Ocean |
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| المؤلفون: | Laura F. Robinson, Paul Lerner, Allison W Jacobel, Sylvain Pichat, Kassandra M Costa, Adi Torfstein, George H. Rowland, Walter Geibert, Jörg Lippold, Alessandro Tagliabue, Samuel L Jaccard, Jean-Claude Dutay, Gideon M. Henderson, Stephanie S. Kienast, Alexandra R. Bausch, Claude Hillaire-Marcel, David McGee, Christoph Heinze, Gisela Winckler, Yuxin Zhou, Sharon S. Hoffmann, Robert F. Anderson, Figen Mekik, Christelle Not, Matthieu Roy-Barman, Frank J. Pavia, Lauren Kipp, Jerry F. McManus, Christopher T. Hayes, Franco Marcantonio, Lise Missiaen, Jennifer L. Middleton, Feifei Deng, David C Lund |
| المساهمون: | Alfred Wegener Institute [Potsdam], Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), Lamont-Doherty Earth Observatory (LDEO), Columbia University [New York], Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Scottish Association for Marine Science (SAMS), German Aerospace Center (DLR), Department of Earth Sciences [Oxford], University of Oxford [Oxford], Université du Québec à Montréal = University of Québec in Montréal (UQAM), Oeschger Centre for Climate Change Research (OCCR), University of Bern, Dalhousie University [Halifax], Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement [Lyon] (LGL-TPE), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École normale supérieure - Lyon (ENS Lyon), Max Planck Institute for Chemistry (MPIC), Max-Planck-Gesellschaft, Géochimie Des Impacts (GEDI), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Department of Oceanography [Cape Town], University of Cape Town, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), University of Oxford, Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Paleoceanography and Paleoclimatology Paleoceanography and Paleoclimatology, American Geophysical Union, 2020, 35 (2), pp.e2019PA003820. ⟨10.1029/2019PA003820⟩ e2019PA003820 Paleoceanography and Paleoclimatology, 2020, 35 (2), pp.e2019PA003820. ⟨10.1029/2019PA003820⟩ Costa, Kassandra M.; Hayes, Christopher T.; Anderson, Robert F.; Pavia, Frank J.; Bausch, Alexandra; Deng, Feifei; Dutay, Jean-Claude; Geibert, Walter; Heinze, Christoph; Henderson, Gideon; Hillaire-Marcel, Claude; Hoffmann, Sharon; Jaccard, Samuel L.; Jacobel, Allison W.; Kienast, Stephanie S.; Kipp, Lauren; Lerner, Paul; Lippold, Jörg; Lund, David; Marcantonio, Franco; ... (2020). 230 Th Normalization: New Insights on an Essential Tool for Quantifying Sedimentary Fluxes in the Modern and Quaternary Ocean. Paleoceanography and paleoclimatology, 35(2) American Geophysical Union 10.1029/2019PA003820 <http://dx.doi.org/10.1029/2019PA003820> |
| بيانات النشر: | HAL CCSD, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Atmospheric Science, 010504 meteorology & atmospheric sciences, Pleistocene, Nepheloid layer, Paleontology, Last Glacial Maximum, 010502 geochemistry & geophysics, Oceanography, 01 natural sciences, chemistry.chemical_compound, chemistry, Continental margin, 13. Climate action, [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry, Carbonate, Sedimentary rock, 14. Life underwater, Quaternary, 550 Earth sciences & geology, Holocene, Geology, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography, 0105 earth and related environmental sciences |
| الوصف: | International audience; 230 Th normalization is a valuable paleoceanographic tool for reconstructing high-resolution sediment fluxes during the late Pleistocene (last~500,000 years). As its application has expanded to ever more diverse marine environments, the nuances of 230 Th systematics, with regard to particle type, particle size, lateral advective/diffusive redistribution, and other processes, have emerged. We synthesized over 1000 sedimentary records of 230 Th from across the global ocean at two time slices, the late Holocene (0-5,000 years ago, or 0-5 ka) and the Last Glacial Maximum (18.5-23.5 ka), and investigated the spatial structure of 230 Th-normalized mass fluxes. On a global scale, sedimentary mass fluxes were significantly higher during the Last Glacial Maximum (1.79-2.17 g/cm 2 kyr, 95% confidence) relative to the Holocene (1.48-1.68 g/cm 2 kyr, 95% confidence). We then examined the potential confounding influences of boundary scavenging, nepheloid layers, hydrothermal scavenging, size-dependent sediment fractionation, and carbonate dissolution on the efficacy of 230 Th as a constant flux proxy. Anomalous 230 Th behavior is sometimes observed proximal to hydrothermal ridges and in continental margins where high particle fluxes and steep continental slopes can lead to the combined effects of boundary scavenging and nepheloid interference. Notwithstanding these limitations, we found that 230Th normalization is a robust tool for determining sediment mass accumulation rates in the majority of pelagic marine settings (>1,000 m water depth). |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 2572-4525 1944-9186 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::55dd4776f8ae43a9ed1806a914bbedd5 https://hal.archives-ouvertes.fr/hal-02826968/document |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....55dd4776f8ae43a9ed1806a914bbedd5 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 25724525 19449186 |
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