Subtropical mangrove and evergreen forest reveal Paleogene terrestrial climate and physiography at the North Pole
International audience Sedimentological, micropaleontological and geochemical studies of IODP Leg 302 boreholes, M0004A and M0002A, drilled on the Lomonosov Ridge near the North pole, are reported to construct chronostratigraphy and helped unravel Paleogene palaeoclimatic. These studies concluded to...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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Main Authors: | , , , |
Other Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2020
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Subjects: | |
Online Access: | https://insu.hal.science/insu-02550462 https://insu.hal.science/insu-02550462/document https://insu.hal.science/insu-02550462/file/Suc-Pal3-2020.pdf https://doi.org/10.1016/j.palaeo.2020.109755 |
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ftunivrennes1hal:oai:HAL:insu-02550462v1 |
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openpolar |
institution |
Open Polar |
collection |
Université de Rennes 1: Publications scientifiques (HAL) |
op_collection_id |
ftunivrennes1hal |
language |
English |
topic |
Pollen flora Climate quantification Eocene Climatostratigraphy IODP 302 Palaeogeography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
Pollen flora Climate quantification Eocene Climatostratigraphy IODP 302 Palaeogeography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Suc, Jean-Pierre Fauquette, Séverine Popescu, Speranta-Maria Robin, Cécile Subtropical mangrove and evergreen forest reveal Paleogene terrestrial climate and physiography at the North Pole |
topic_facet |
Pollen flora Climate quantification Eocene Climatostratigraphy IODP 302 Palaeogeography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience Sedimentological, micropaleontological and geochemical studies of IODP Leg 302 boreholes, M0004A and M0002A, drilled on the Lomonosov Ridge near the North pole, are reported to construct chronostratigraphy and helped unravel Paleogene palaeoclimatic. These studies concluded to a mean annual temperature of sea surface waters ranging between 21 and 25 °C during the Paleocene–Eocene Thermal Maximum and to the occurrence of episodic ice on the Arctic shelf in the earliest Mid-Eocene. Pollen records are characterised by excellent preservation and identification of 112 taxa reveals a subtropical coastal vegetation comprising Taxodium-Glyptostrobus swamps alternating with Avicennia mangrove. The hinterland was occupied by a subtropical evergreen forest including Engelhardia and Distylium, occasionally replaced by Rhodoleia and Castanopsis-Lithocarpus. Climate was reconstructed using the Climatic Amplitude Method, resulting in the following temperature ranges for low elevations: mean annual temperature 18–22 °C, mean temperature of the coldest month 10–14.5 °C, mean temperature of the warmest month 26–27.5 °C, and annual precipitation 1150–1400 mm. Palaeovegetation data allow us to establish climatostratigraphic relationships with the generalized oxygen isotope curve, providing evidence for warm periods (e.g.: Paleocene–Eocene Thermal Maximum, PETM; Early Eocene Climatic Optimum, EECO; Mid Eocene Climatic Optimum, MECO) alternating with cooler periods. We date the latest record of Avicennia mangrove in the Arctic Basin to the MECO. The Azolla phase did not occur after the EECO but at ~50 Ma during a climatically unstable episode during the thermal optimum. Recurrence of rarely produced and weakly transported Avicennia pollen, the exceptional level of preservation of pollen grains, and the high plant diversity indicate that lands of the Lomonosov Ridge were connected to North America in the Ellesmere Island region which, in addition, provided pollen grains of Gymnosperms from high elevations. ... |
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) 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) GeoBioStratData.Consulting Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) IODP-France |
format |
Article in Journal/Newspaper |
author |
Suc, Jean-Pierre Fauquette, Séverine Popescu, Speranta-Maria Robin, Cécile |
author_facet |
Suc, Jean-Pierre Fauquette, Séverine Popescu, Speranta-Maria Robin, Cécile |
author_sort |
Suc, Jean-Pierre |
title |
Subtropical mangrove and evergreen forest reveal Paleogene terrestrial climate and physiography at the North Pole |
title_short |
Subtropical mangrove and evergreen forest reveal Paleogene terrestrial climate and physiography at the North Pole |
title_full |
Subtropical mangrove and evergreen forest reveal Paleogene terrestrial climate and physiography at the North Pole |
title_fullStr |
Subtropical mangrove and evergreen forest reveal Paleogene terrestrial climate and physiography at the North Pole |
title_full_unstemmed |
Subtropical mangrove and evergreen forest reveal Paleogene terrestrial climate and physiography at the North Pole |
title_sort |
subtropical mangrove and evergreen forest reveal paleogene terrestrial climate and physiography at the north pole |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://insu.hal.science/insu-02550462 https://insu.hal.science/insu-02550462/document https://insu.hal.science/insu-02550462/file/Suc-Pal3-2020.pdf https://doi.org/10.1016/j.palaeo.2020.109755 |
genre |
Arctic Basin Arctic Ellesmere Island Lomonosov Ridge North Pole |
genre_facet |
Arctic Basin Arctic Ellesmere Island Lomonosov Ridge North Pole |
op_source |
ISSN: 0031-0182 EISSN: 1872-616X Palaeogeography, Palaeoclimatology, Palaeoecology https://insu.hal.science/insu-02550462 Palaeogeography, Palaeoclimatology, Palaeoecology, 2020, 551, pp.109755. ⟨10.1016/j.palaeo.2020.109755⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2020.109755 insu-02550462 https://insu.hal.science/insu-02550462 https://insu.hal.science/insu-02550462/document https://insu.hal.science/insu-02550462/file/Suc-Pal3-2020.pdf doi:10.1016/j.palaeo.2020.109755 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.palaeo.2020.109755 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
551 |
container_start_page |
109755 |
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1799471747978756096 |
spelling |
ftunivrennes1hal:oai:HAL:insu-02550462v1 2024-05-19T07:33:39+00:00 Subtropical mangrove and evergreen forest reveal Paleogene terrestrial climate and physiography at the North Pole Suc, Jean-Pierre Fauquette, Séverine Popescu, Speranta-Maria Robin, Cécile 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) 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) GeoBioStratData.Consulting Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) IODP-France 2020-08 https://insu.hal.science/insu-02550462 https://insu.hal.science/insu-02550462/document https://insu.hal.science/insu-02550462/file/Suc-Pal3-2020.pdf https://doi.org/10.1016/j.palaeo.2020.109755 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2020.109755 insu-02550462 https://insu.hal.science/insu-02550462 https://insu.hal.science/insu-02550462/document https://insu.hal.science/insu-02550462/file/Suc-Pal3-2020.pdf doi:10.1016/j.palaeo.2020.109755 info:eu-repo/semantics/OpenAccess ISSN: 0031-0182 EISSN: 1872-616X Palaeogeography, Palaeoclimatology, Palaeoecology https://insu.hal.science/insu-02550462 Palaeogeography, Palaeoclimatology, Palaeoecology, 2020, 551, pp.109755. ⟨10.1016/j.palaeo.2020.109755⟩ Pollen flora Climate quantification Eocene Climatostratigraphy IODP 302 Palaeogeography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2020 ftunivrennes1hal https://doi.org/10.1016/j.palaeo.2020.109755 2024-05-02T00:01:06Z International audience Sedimentological, micropaleontological and geochemical studies of IODP Leg 302 boreholes, M0004A and M0002A, drilled on the Lomonosov Ridge near the North pole, are reported to construct chronostratigraphy and helped unravel Paleogene palaeoclimatic. These studies concluded to a mean annual temperature of sea surface waters ranging between 21 and 25 °C during the Paleocene–Eocene Thermal Maximum and to the occurrence of episodic ice on the Arctic shelf in the earliest Mid-Eocene. Pollen records are characterised by excellent preservation and identification of 112 taxa reveals a subtropical coastal vegetation comprising Taxodium-Glyptostrobus swamps alternating with Avicennia mangrove. The hinterland was occupied by a subtropical evergreen forest including Engelhardia and Distylium, occasionally replaced by Rhodoleia and Castanopsis-Lithocarpus. Climate was reconstructed using the Climatic Amplitude Method, resulting in the following temperature ranges for low elevations: mean annual temperature 18–22 °C, mean temperature of the coldest month 10–14.5 °C, mean temperature of the warmest month 26–27.5 °C, and annual precipitation 1150–1400 mm. Palaeovegetation data allow us to establish climatostratigraphic relationships with the generalized oxygen isotope curve, providing evidence for warm periods (e.g.: Paleocene–Eocene Thermal Maximum, PETM; Early Eocene Climatic Optimum, EECO; Mid Eocene Climatic Optimum, MECO) alternating with cooler periods. We date the latest record of Avicennia mangrove in the Arctic Basin to the MECO. The Azolla phase did not occur after the EECO but at ~50 Ma during a climatically unstable episode during the thermal optimum. Recurrence of rarely produced and weakly transported Avicennia pollen, the exceptional level of preservation of pollen grains, and the high plant diversity indicate that lands of the Lomonosov Ridge were connected to North America in the Ellesmere Island region which, in addition, provided pollen grains of Gymnosperms from high elevations. ... Article in Journal/Newspaper Arctic Basin Arctic Ellesmere Island Lomonosov Ridge North Pole Université de Rennes 1: Publications scientifiques (HAL) Palaeogeography, Palaeoclimatology, Palaeoecology 551 109755 |