Smithian-Spathian boundary event: Evidence for global climatic change in the wake of the end-Permian biotic crisis
International audience One of the most important carbon cycle perturbations following the end-Permian mass extinction event straddles the Smithian-Spathian boundary (SSB) (Olenekian, Early Triassic). This anomaly is characterized by a prominent positive carbon isotope excursion known from Tethyan ma...
Published in: | Geology |
---|---|
Main Authors: | , , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2007
|
Subjects: | |
Online Access: | https://hal.science/hal-00173717 https://doi.org/10.1130/G23117A.1 |
id |
ftunivnantes:oai:HAL:hal-00173717v1 |
---|---|
record_format |
openpolar |
spelling |
ftunivnantes:oai:HAL:hal-00173717v1 2023-05-15T15:39:05+02:00 Smithian-Spathian boundary event: Evidence for global climatic change in the wake of the end-Permian biotic crisis Galfetti, Thomas A. Hochuli, Peter Brayard, Arnaud Bucher, Hugo Weissert, Helmut Os Vigran, Jorunn Paläontologisches Institut Universität Zürich Zürich = University of Zurich (UZH) PaleoEnvironnements et PaleobioSphere (PEPS) Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2007 https://hal.science/hal-00173717 https://doi.org/10.1130/G23117A.1 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1130/G23117A.1 hal-00173717 https://hal.science/hal-00173717 doi:10.1130/G23117A.1 Geological Society of America. https://hal.science/hal-00173717 Geological Society of America., 2007, 35 (4), pp.291-294. ⟨10.1130/G23117A.1⟩ Late Early Triassic climate change extinction event palynology ammonoids carbon isotopes [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy info:eu-repo/semantics/article Journal articles 2007 ftunivnantes https://doi.org/10.1130/G23117A.1 2023-02-08T08:47:47Z International audience One of the most important carbon cycle perturbations following the end-Permian mass extinction event straddles the Smithian-Spathian boundary (SSB) (Olenekian, Early Triassic). This anomaly is characterized by a prominent positive carbon isotope excursion known from Tethyan marine rocks. Its global signifi cance is established here by a new high paleolatitude record (Spitsbergen). Paleontological evidence, such as Boreal palynological data (Barents Sea, Norway) and global patterns of ammonoid distribution, indicates a synchronous major change in terrestrial and marine ecosystems near the SSB. The reestablishment of highly diverse plant ecosystems, including the rise of woody gymnosperms and decline of the formerly dominating lycopods, is interpreted as an effect of a major climate change. This hypothesis is supported by modeling of ammonoid paleobiogeography, the distribution patterns of which are interpreted as a proxy for sea surface temperatures (SST). The latest Smithian thus appears to have been a time of a warm and equable climate as expressed by an almost fl at pole to equator SST gradient. In contrast, the steep Spathian SST gradient suggests latitudinally differentiated climatic conditions. We propose that this drastic climate change and the global carbon cycle perturbation were triggered by a massive end-Smithian CO2 injection. The SSB event could therefore represent one of the causes for stepwise and delayed recovery of marine and terrestrial biotas in the wake of the end-Permian biotic crisis. Article in Journal/Newspaper Barents Sea Spitsbergen Université de Nantes: HAL-UNIV-NANTES Barents Sea Norway Geology 35 4 291 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Late Early Triassic climate change extinction event palynology ammonoids carbon isotopes [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy |
spellingShingle |
Late Early Triassic climate change extinction event palynology ammonoids carbon isotopes [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy Galfetti, Thomas A. Hochuli, Peter Brayard, Arnaud Bucher, Hugo Weissert, Helmut Os Vigran, Jorunn Smithian-Spathian boundary event: Evidence for global climatic change in the wake of the end-Permian biotic crisis |
topic_facet |
Late Early Triassic climate change extinction event palynology ammonoids carbon isotopes [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy |
description |
International audience One of the most important carbon cycle perturbations following the end-Permian mass extinction event straddles the Smithian-Spathian boundary (SSB) (Olenekian, Early Triassic). This anomaly is characterized by a prominent positive carbon isotope excursion known from Tethyan marine rocks. Its global signifi cance is established here by a new high paleolatitude record (Spitsbergen). Paleontological evidence, such as Boreal palynological data (Barents Sea, Norway) and global patterns of ammonoid distribution, indicates a synchronous major change in terrestrial and marine ecosystems near the SSB. The reestablishment of highly diverse plant ecosystems, including the rise of woody gymnosperms and decline of the formerly dominating lycopods, is interpreted as an effect of a major climate change. This hypothesis is supported by modeling of ammonoid paleobiogeography, the distribution patterns of which are interpreted as a proxy for sea surface temperatures (SST). The latest Smithian thus appears to have been a time of a warm and equable climate as expressed by an almost fl at pole to equator SST gradient. In contrast, the steep Spathian SST gradient suggests latitudinally differentiated climatic conditions. We propose that this drastic climate change and the global carbon cycle perturbation were triggered by a massive end-Smithian CO2 injection. The SSB event could therefore represent one of the causes for stepwise and delayed recovery of marine and terrestrial biotas in the wake of the end-Permian biotic crisis. |
author2 |
Paläontologisches Institut Universität Zürich Zürich = University of Zurich (UZH) PaleoEnvironnements et PaleobioSphere (PEPS) Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Galfetti, Thomas A. Hochuli, Peter Brayard, Arnaud Bucher, Hugo Weissert, Helmut Os Vigran, Jorunn |
author_facet |
Galfetti, Thomas A. Hochuli, Peter Brayard, Arnaud Bucher, Hugo Weissert, Helmut Os Vigran, Jorunn |
author_sort |
Galfetti, Thomas |
title |
Smithian-Spathian boundary event: Evidence for global climatic change in the wake of the end-Permian biotic crisis |
title_short |
Smithian-Spathian boundary event: Evidence for global climatic change in the wake of the end-Permian biotic crisis |
title_full |
Smithian-Spathian boundary event: Evidence for global climatic change in the wake of the end-Permian biotic crisis |
title_fullStr |
Smithian-Spathian boundary event: Evidence for global climatic change in the wake of the end-Permian biotic crisis |
title_full_unstemmed |
Smithian-Spathian boundary event: Evidence for global climatic change in the wake of the end-Permian biotic crisis |
title_sort |
smithian-spathian boundary event: evidence for global climatic change in the wake of the end-permian biotic crisis |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00173717 https://doi.org/10.1130/G23117A.1 |
geographic |
Barents Sea Norway |
geographic_facet |
Barents Sea Norway |
genre |
Barents Sea Spitsbergen |
genre_facet |
Barents Sea Spitsbergen |
op_source |
Geological Society of America. https://hal.science/hal-00173717 Geological Society of America., 2007, 35 (4), pp.291-294. ⟨10.1130/G23117A.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1130/G23117A.1 hal-00173717 https://hal.science/hal-00173717 doi:10.1130/G23117A.1 |
op_doi |
https://doi.org/10.1130/G23117A.1 |
container_title |
Geology |
container_volume |
35 |
container_issue |
4 |
container_start_page |
291 |
_version_ |
1766370510706311168 |