Major perturbations in the global carbon cycle and photosymbiont-bearing planktic foraminifera during the early Eocene
A marked switch in the abundance of the planktic foraminiferal genera Morozovella and Acarinina occurred at low-latitude sites near the start of the Early Eocene Climatic Optimum (EECO), a multi-million-year interval when Earth surface temperatures reached their Cenozoic maximum. Stable carbon and o...
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ftunivferrarair:oai:sfera.unife.it:11392/2342935 2024-09-15T18:26:23+00:00 Major perturbations in the global carbon cycle and photosymbiont-bearing planktic foraminifera during the early Eocene LUCIANI, Valeria Dickens, Gerald R. Backman, Jan Fornaciari, Eliana Giusberti, Luca Agnini, Claudia D'ONOFRIO, Roberta Luciani, Valeria Dickens, Gerald R. Backman, Jan Fornaciari, Eliana Giusberti, Luca Agnini, Claudia D'Onofrio, Roberta 2016 STAMPA http://hdl.handle.net/11392/2342935 https://doi.org/10.5194/cp-12-981-2016 https://cp.copernicus.org/articles/12/981/2016/ eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000376073100011 volume:12 issue:4 firstpage:981 lastpage:1007 numberofpages:27 journal:CLIMATE OF THE PAST http://hdl.handle.net/11392/2342935 doi:10.5194/cp-12-981-2016 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84969262482 https://cp.copernicus.org/articles/12/981/2016/ info:eu-repo/semantics/openAccess Early Eocene Climatic Optimum Carbon cycle Planktic foraminifera info:eu-repo/semantics/article 2016 ftunivferrarair https://doi.org/10.5194/cp-12-981-2016 2024-08-13T23:46:32Z A marked switch in the abundance of the planktic foraminiferal genera Morozovella and Acarinina occurred at low-latitude sites near the start of the Early Eocene Climatic Optimum (EECO), a multi-million-year interval when Earth surface temperatures reached their Cenozoic maximum. Stable carbon and oxygen isotope data of bulk sediment are presented from across the EECO at two locations: Possagno in northeast Italy and Deep Sea Drilling Project (DSDP) Site 577 in the northwest Pacific. Relative abundances of planktic foraminifera are presented from these two locations, as well as from Ocean Drilling Program (ODP) Site 1051 in the northwest Atlantic. All three sections have good stratigraphic markers, and the 13C records at each section can be correlated amongst each other and to 13C records at other locations across the globe. These records show that a series of negative carbon isotope excursions (CIEs) occurred before,during and across the EECO, which is defined here as the interval between the J event and the base of Discoaster sublodoensis. Significant though ephemeral modifications in planktic foraminiferal assemblages coincide with some of the short-term CIEs, which were marked by increases in the relative abundance of Acarinina, similar to what happened across established hyperthermal events in Tethyan settings prior to the EECO. Most crucially, a temporal link exists between the onset of the EECO, carbon cycle changes during this time and the decline in Morozovella. Possible causes are manifold and may include temperature effects on photosymbiont-bearing planktic foraminifera and changes in ocean chemistry. Article in Journal/Newspaper Northwest Atlantic Università degli Studi di Ferrara: CINECA IRIS Climate of the Past 12 4 981 1007 |
institution |
Open Polar |
collection |
Università degli Studi di Ferrara: CINECA IRIS |
op_collection_id |
ftunivferrarair |
language |
English |
topic |
Early Eocene Climatic Optimum Carbon cycle Planktic foraminifera |
spellingShingle |
Early Eocene Climatic Optimum Carbon cycle Planktic foraminifera LUCIANI, Valeria Dickens, Gerald R. Backman, Jan Fornaciari, Eliana Giusberti, Luca Agnini, Claudia D'ONOFRIO, Roberta Major perturbations in the global carbon cycle and photosymbiont-bearing planktic foraminifera during the early Eocene |
topic_facet |
Early Eocene Climatic Optimum Carbon cycle Planktic foraminifera |
description |
A marked switch in the abundance of the planktic foraminiferal genera Morozovella and Acarinina occurred at low-latitude sites near the start of the Early Eocene Climatic Optimum (EECO), a multi-million-year interval when Earth surface temperatures reached their Cenozoic maximum. Stable carbon and oxygen isotope data of bulk sediment are presented from across the EECO at two locations: Possagno in northeast Italy and Deep Sea Drilling Project (DSDP) Site 577 in the northwest Pacific. Relative abundances of planktic foraminifera are presented from these two locations, as well as from Ocean Drilling Program (ODP) Site 1051 in the northwest Atlantic. All three sections have good stratigraphic markers, and the 13C records at each section can be correlated amongst each other and to 13C records at other locations across the globe. These records show that a series of negative carbon isotope excursions (CIEs) occurred before,during and across the EECO, which is defined here as the interval between the J event and the base of Discoaster sublodoensis. Significant though ephemeral modifications in planktic foraminiferal assemblages coincide with some of the short-term CIEs, which were marked by increases in the relative abundance of Acarinina, similar to what happened across established hyperthermal events in Tethyan settings prior to the EECO. Most crucially, a temporal link exists between the onset of the EECO, carbon cycle changes during this time and the decline in Morozovella. Possible causes are manifold and may include temperature effects on photosymbiont-bearing planktic foraminifera and changes in ocean chemistry. |
author2 |
Luciani, Valeria Dickens, Gerald R. Backman, Jan Fornaciari, Eliana Giusberti, Luca Agnini, Claudia D'Onofrio, Roberta |
format |
Article in Journal/Newspaper |
author |
LUCIANI, Valeria Dickens, Gerald R. Backman, Jan Fornaciari, Eliana Giusberti, Luca Agnini, Claudia D'ONOFRIO, Roberta |
author_facet |
LUCIANI, Valeria Dickens, Gerald R. Backman, Jan Fornaciari, Eliana Giusberti, Luca Agnini, Claudia D'ONOFRIO, Roberta |
author_sort |
LUCIANI, Valeria |
title |
Major perturbations in the global carbon cycle and photosymbiont-bearing planktic foraminifera during the early Eocene |
title_short |
Major perturbations in the global carbon cycle and photosymbiont-bearing planktic foraminifera during the early Eocene |
title_full |
Major perturbations in the global carbon cycle and photosymbiont-bearing planktic foraminifera during the early Eocene |
title_fullStr |
Major perturbations in the global carbon cycle and photosymbiont-bearing planktic foraminifera during the early Eocene |
title_full_unstemmed |
Major perturbations in the global carbon cycle and photosymbiont-bearing planktic foraminifera during the early Eocene |
title_sort |
major perturbations in the global carbon cycle and photosymbiont-bearing planktic foraminifera during the early eocene |
publishDate |
2016 |
url |
http://hdl.handle.net/11392/2342935 https://doi.org/10.5194/cp-12-981-2016 https://cp.copernicus.org/articles/12/981/2016/ |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000376073100011 volume:12 issue:4 firstpage:981 lastpage:1007 numberofpages:27 journal:CLIMATE OF THE PAST http://hdl.handle.net/11392/2342935 doi:10.5194/cp-12-981-2016 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84969262482 https://cp.copernicus.org/articles/12/981/2016/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-12-981-2016 |
container_title |
Climate of the Past |
container_volume |
12 |
container_issue |
4 |
container_start_page |
981 |
op_container_end_page |
1007 |
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1810466870296313856 |