Evidence for subtropical warmth in the Canadian Arctic (Beaufort-Mackenzie, Northwest Territories, Canada) during the early Eocene
International audience During the Paleocene–Eocene, the Earth experienced the warmest conditions of the Cenozoic and reduced equator-to-pole temperature gradients. Compared to low- and mid-latitude sites, Paleogene environmental changes are less documented in Arctic regions, although such high latit...
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2019
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Online Access: | https://hal.science/hal-02321960 https://hal.science/hal-02321960/document https://hal.science/hal-02321960/file/Salpin%20et%20al%20version%20HAL.pdf https://doi.org/10.1130/2018.2541(27 |
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ftunimontpellier:oai:HAL:hal-02321960v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Montpellier: HAL |
op_collection_id |
ftunimontpellier |
language |
English |
topic |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Salpin, Marie Schnyder, Johann Baudin, François Suan, Guillaume, C Suc, Jean-Pierre Popescu, Speranta-Maria Fauquette, Séverine Reinhardt, Lutz Schmitz, Mark, D Labrousse, Loic Evidence for subtropical warmth in the Canadian Arctic (Beaufort-Mackenzie, Northwest Territories, Canada) during the early Eocene |
topic_facet |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience During the Paleocene–Eocene, the Earth experienced the warmest conditions of the Cenozoic and reduced equator-to-pole temperature gradients. Compared to low- and mid-latitude sites, Paleogene environmental changes are less documented in Arctic regions, although such high latitude areas constitute a critical domain to constrain global climate changes. Floral and faunal assemblages indicative of exceptionally warm and humid conditions during the late Paleocene–early Eocene have been reported in several localities around the Arctic Ocean. Additional studies are required to ascertain the effects of Paleocene–Eocene global environmental changes on western Arctic regions. Here we present multiproxy data from early Eocene deltaic plain sediments of the Mackenzie Delta (Canada). This environment is characterized by littoral forest, including swamp, showing that the mangrove Avicennia grew in Arctic Canada near 75°N under air temperatures averaging 21–22 °C annually and 10–14 °C in winter and with precipitation of 1200–1400 mm/yr. Kaolinite contents are high (up to 75% of clay assemblages), as under a modern subtropical climate. The Avicennia pollens recently found in the New Siberian Islands and in Arctic Canada imply that warm and wet conditions were widespread along the Arctic coast during the early Eocene. It also suggests a marine connection between the Arctic Basin and the mid-latitude oceans. We propose that an oceanic current must have connected the Arctic Basin to the Atlantic and/or Pacific and that an internal current developed in the Arctic Basin since the early Eocene. |
author2 |
Institut des Sciences de la Terre de Paris (iSTeP) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 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) Institut des Sciences de l'Evolution de Montpellier (UMR ISEM) Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement IRD : UR226-Centre National de la Recherche Scientifique (CNRS) Bundesanstalt für Geowissenschaften und Rohstoffe (BGR) Department of Geosciences Boise Boise State University |
format |
Article in Journal/Newspaper |
author |
Salpin, Marie Schnyder, Johann Baudin, François Suan, Guillaume, C Suc, Jean-Pierre Popescu, Speranta-Maria Fauquette, Séverine Reinhardt, Lutz Schmitz, Mark, D Labrousse, Loic |
author_facet |
Salpin, Marie Schnyder, Johann Baudin, François Suan, Guillaume, C Suc, Jean-Pierre Popescu, Speranta-Maria Fauquette, Séverine Reinhardt, Lutz Schmitz, Mark, D Labrousse, Loic |
author_sort |
Salpin, Marie |
title |
Evidence for subtropical warmth in the Canadian Arctic (Beaufort-Mackenzie, Northwest Territories, Canada) during the early Eocene |
title_short |
Evidence for subtropical warmth in the Canadian Arctic (Beaufort-Mackenzie, Northwest Territories, Canada) during the early Eocene |
title_full |
Evidence for subtropical warmth in the Canadian Arctic (Beaufort-Mackenzie, Northwest Territories, Canada) during the early Eocene |
title_fullStr |
Evidence for subtropical warmth in the Canadian Arctic (Beaufort-Mackenzie, Northwest Territories, Canada) during the early Eocene |
title_full_unstemmed |
Evidence for subtropical warmth in the Canadian Arctic (Beaufort-Mackenzie, Northwest Territories, Canada) during the early Eocene |
title_sort |
evidence for subtropical warmth in the canadian arctic (beaufort-mackenzie, northwest territories, canada) during the early eocene |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-02321960 https://hal.science/hal-02321960/document https://hal.science/hal-02321960/file/Salpin%20et%20al%20version%20HAL.pdf https://doi.org/10.1130/2018.2541(27 |
genre |
Arctic Arctic Basin Arctic Arctic Ocean Mackenzie Delta New Siberian Islands Northwest Territories |
genre_facet |
Arctic Arctic Basin Arctic Arctic Ocean Mackenzie Delta New Siberian Islands Northwest Territories |
op_source |
ISSN: 0072-1077 EISSN: 2331-219X Geological Society of America Special Papers https://hal.science/hal-02321960 Geological Society of America Special Papers, 2019, Circum-Arctic Structural Events: Tectonic Evolution of the Arctic Margins and Trans-Arctic Links with Adjacent Orogens, 541, ⟨10.1130/2018.2541(27)⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1130/2018.2541(27) hal-02321960 https://hal.science/hal-02321960 https://hal.science/hal-02321960/document https://hal.science/hal-02321960/file/Salpin%20et%20al%20version%20HAL.pdf doi:10.1130/2018.2541(27) |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1130/2018.2541(2710.1130/2018.2541(27) |
_version_ |
1799471140579573760 |
spelling |
ftunimontpellier:oai:HAL:hal-02321960v1 2024-05-19T07:32:58+00:00 Evidence for subtropical warmth in the Canadian Arctic (Beaufort-Mackenzie, Northwest Territories, Canada) during the early Eocene Salpin, Marie Schnyder, Johann Baudin, François Suan, Guillaume, C Suc, Jean-Pierre Popescu, Speranta-Maria Fauquette, Séverine Reinhardt, Lutz Schmitz, Mark, D Labrousse, Loic Institut des Sciences de la Terre de Paris (iSTeP) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 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) Institut des Sciences de l'Evolution de Montpellier (UMR ISEM) Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement IRD : UR226-Centre National de la Recherche Scientifique (CNRS) Bundesanstalt für Geowissenschaften und Rohstoffe (BGR) Department of Geosciences Boise Boise State University 2019 https://hal.science/hal-02321960 https://hal.science/hal-02321960/document https://hal.science/hal-02321960/file/Salpin%20et%20al%20version%20HAL.pdf https://doi.org/10.1130/2018.2541(27 en eng HAL CCSD Geological Society of America info:eu-repo/semantics/altIdentifier/doi/10.1130/2018.2541(27) hal-02321960 https://hal.science/hal-02321960 https://hal.science/hal-02321960/document https://hal.science/hal-02321960/file/Salpin%20et%20al%20version%20HAL.pdf doi:10.1130/2018.2541(27) info:eu-repo/semantics/OpenAccess ISSN: 0072-1077 EISSN: 2331-219X Geological Society of America Special Papers https://hal.science/hal-02321960 Geological Society of America Special Papers, 2019, Circum-Arctic Structural Events: Tectonic Evolution of the Arctic Margins and Trans-Arctic Links with Adjacent Orogens, 541, ⟨10.1130/2018.2541(27)⟩ [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2019 ftunimontpellier https://doi.org/10.1130/2018.2541(2710.1130/2018.2541(27) 2024-05-01T00:34:07Z International audience During the Paleocene–Eocene, the Earth experienced the warmest conditions of the Cenozoic and reduced equator-to-pole temperature gradients. Compared to low- and mid-latitude sites, Paleogene environmental changes are less documented in Arctic regions, although such high latitude areas constitute a critical domain to constrain global climate changes. Floral and faunal assemblages indicative of exceptionally warm and humid conditions during the late Paleocene–early Eocene have been reported in several localities around the Arctic Ocean. Additional studies are required to ascertain the effects of Paleocene–Eocene global environmental changes on western Arctic regions. Here we present multiproxy data from early Eocene deltaic plain sediments of the Mackenzie Delta (Canada). This environment is characterized by littoral forest, including swamp, showing that the mangrove Avicennia grew in Arctic Canada near 75°N under air temperatures averaging 21–22 °C annually and 10–14 °C in winter and with precipitation of 1200–1400 mm/yr. Kaolinite contents are high (up to 75% of clay assemblages), as under a modern subtropical climate. The Avicennia pollens recently found in the New Siberian Islands and in Arctic Canada imply that warm and wet conditions were widespread along the Arctic coast during the early Eocene. It also suggests a marine connection between the Arctic Basin and the mid-latitude oceans. We propose that an oceanic current must have connected the Arctic Basin to the Atlantic and/or Pacific and that an internal current developed in the Arctic Basin since the early Eocene. Article in Journal/Newspaper Arctic Arctic Basin Arctic Arctic Ocean Mackenzie Delta New Siberian Islands Northwest Territories Université de Montpellier: HAL |