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Subtropical climate conditions and mangrove growth in Arctic Siberia during the early Eocene

2017; Geological Society of America; Volume: 45; Issue: 6 Linguagem: Inglês

10.1130/g38547.1

1943-2682

Guillaume Suan, Speranta‐Maria Popescu, Jean‐Pierre Suc, Johann Schnyder, Séverine Fauquette, François Baudin, Daichi Yoon, Karsten Piepjohn, Н. Н. Соболев, Loïc Labrousse,

Methane Hydrates and Related Phenomena

Research Article| June 01, 2017 Subtropical climate conditions and mangrove growth in Arctic Siberia during the early Eocene Guillaume Suan; Guillaume Suan * 1Université Claude Bernard Lyon 1, ENS-Lyon, CNRS, UMR 5276 LGL-TPE, F-69622 Villeurbanne, France *E-mail: guillaume.suan@univ-lyon1.fr Search for other works by this author on: GSW Google Scholar Speranta-Maria Popescu; Speranta-Maria Popescu 2GeoBioStratData.Consulting, 385 route du Mas Rillier, 69140 Rillieux la Pape, France Search for other works by this author on: GSW Google Scholar Jean-Pierre Suc; Jean-Pierre Suc 3Sorbonne Universités, UPMC Université Paris 06, CNRS, Institut des Sciences de la Terre Paris (ISTeP), 75005 Paris, France Search for other works by this author on: GSW Google Scholar Johann Schnyder; Johann Schnyder 3Sorbonne Universités, UPMC Université Paris 06, CNRS, Institut des Sciences de la Terre Paris (ISTeP), 75005 Paris, France Search for other works by this author on: GSW Google Scholar Séverine Fauquette; Séverine Fauquette 4Institut des Sciences de l'Évolution, Université de Montpellier, CNRS 5554, IRD, Place Eugène Bataillon, 34095 Montpellier cedex 5, France Search for other works by this author on: GSW Google Scholar François Baudin; François Baudin 3Sorbonne Universités, UPMC Université Paris 06, CNRS, Institut des Sciences de la Terre Paris (ISTeP), 75005 Paris, France Search for other works by this author on: GSW Google Scholar Daichi Yoon; Daichi Yoon 3Sorbonne Universités, UPMC Université Paris 06, CNRS, Institut des Sciences de la Terre Paris (ISTeP), 75005 Paris, France Search for other works by this author on: GSW Google Scholar Karsten Piepjohn; Karsten Piepjohn 5Bundesanstalt für Geowissenschaften und Rohstoffe, Geozentrum Hannover, Stilleweg 2, 30655 Hannover, Germany Search for other works by this author on: GSW Google Scholar Nikolay N. Sobolev; Nikolay N. Sobolev 6A.P. Karpinsky Russian Geological Research Institute (VSEGEI), 74, Sredny prospect, 199106, St. Petersburg, Russia Search for other works by this author on: GSW Google Scholar Loïc Labrousse Loïc Labrousse 3Sorbonne Universités, UPMC Université Paris 06, CNRS, Institut des Sciences de la Terre Paris (ISTeP), 75005 Paris, France Search for other works by this author on: GSW Google Scholar Author and Article Information Guillaume Suan * 1Université Claude Bernard Lyon 1, ENS-Lyon, CNRS, UMR 5276 LGL-TPE, F-69622 Villeurbanne, France Speranta-Maria Popescu 2GeoBioStratData.Consulting, 385 route du Mas Rillier, 69140 Rillieux la Pape, France Jean-Pierre Suc 3Sorbonne Universités, UPMC Université Paris 06, CNRS, Institut des Sciences de la Terre Paris (ISTeP), 75005 Paris, France Johann Schnyder 3Sorbonne Universités, UPMC Université Paris 06, CNRS, Institut des Sciences de la Terre Paris (ISTeP), 75005 Paris, France Séverine Fauquette 4Institut des Sciences de l'Évolution, Université de Montpellier, CNRS 5554, IRD, Place Eugène Bataillon, 34095 Montpellier cedex 5, France François Baudin 3Sorbonne Universités, UPMC Université Paris 06, CNRS, Institut des Sciences de la Terre Paris (ISTeP), 75005 Paris, France Daichi Yoon 3Sorbonne Universités, UPMC Université Paris 06, CNRS, Institut des Sciences de la Terre Paris (ISTeP), 75005 Paris, France Karsten Piepjohn 5Bundesanstalt für Geowissenschaften und Rohstoffe, Geozentrum Hannover, Stilleweg 2, 30655 Hannover, Germany Nikolay N. Sobolev 6A.P. Karpinsky Russian Geological Research Institute (VSEGEI), 74, Sredny prospect, 199106, St. Petersburg, Russia Loïc Labrousse 3Sorbonne Universités, UPMC Université Paris 06, CNRS, Institut des Sciences de la Terre Paris (ISTeP), 75005 Paris, France *E-mail: guillaume.suan@univ-lyon1.fr Publisher: Geological Society of America Received: 30 Aug 2016 Revision Received: 08 Feb 2017 Accepted: 11 Feb 2017 First Online: 28 Jun 2017 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2017 Geological Society of America Geology (2017) 45 (6): 539–542. https://doi.org/10.1130/G38547.1 Article history Received: 30 Aug 2016 Revision Received: 08 Feb 2017 Accepted: 11 Feb 2017 First Online: 28 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Guillaume Suan, Speranta-Maria Popescu, Jean-Pierre Suc, Johann Schnyder, Séverine Fauquette, François Baudin, Daichi Yoon, Karsten Piepjohn, Nikolay N. Sobolev, Loïc Labrousse; Subtropical climate conditions and mangrove growth in Arctic Siberia during the early Eocene. Geology 2017;; 45 (6): 539–542. doi: https://doi.org/10.1130/G38547.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The early Eocene (ca. 56–47.8 Ma) was an interval of exceptional warmth with reduced pole-to-equator temperature gradients. Climate proxies indicate mean annual air temperatures (MATs) and sea-surface temperatures (SSTs) exceeding 8–18 °C and frost-free, mild winters in polar areas, features that have proven difficult to reproduce with the most elaborate climate models. A full appraisal of the early Eocene polar climate has been, however, limited by possible seasonal biases associated with geochemical proxies and the lack of data from the vast Eurasian Arctic. Here we present multiproxy data from lower-middle Eocene coastal plain sediments of the New Siberian Islands (Russia) showing that taxodioid Cupressaceae, palms, and the mangrove Avicennia grew in Arctic Siberia above 72°N under air temperatures averaging 16–21 °C annually and 5.5–14 °C in winter. Kaolinite contents are exceptionally high (up to 60% of clay assemblages) and comparable to those found in present-day subtropical soils formed under high mean annual precipitation (MAP >1000 mm) and warm (MAT >15 °C) conditions. The Avicennia pollen records the northernmost mangrove growth ever documented and indicates early Eocene SSTs exceeding 13 °C in winter and 18 °C in summer. Considering the high MAP estimated for Arctic Siberia and other pan-Arctic landmasses, we propose that the heat from warm river waters draining into the Arctic might have amplified early Eocene polar warmth. Our results provide the first climate constraints for the early Eocene of Arctic Siberia and support the view that most climate models underestimate polar warming in greenhouse conditions. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.