Pliocene oceanic seaways and global climate
Tectonically induced changes in oceanic seaways had profound effects on global and regional climate during the Late Neogene. The constriction of the Central American Seaway reached a critical threshold during the early Pliocene ~4.8–4 million years (Ma) ago. Model simulations indicate the strengthen...
Published in: | Scientific Reports |
---|---|
Main Authors: | , , , , , , |
Language: | English |
Published: |
2017
|
Subjects: | |
Online Access: | https://repository.publisso.de/resource/frl:6416853 https://doi.org/10.1038/srep39842 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5215318/ https://www.nature.com/articles/srep39842#Sec6 |
id |
ftleibnizopen:oai:oai.leibnizopen.de:eECQhIgBdbrxVwz6n43o |
---|---|
record_format |
openpolar |
spelling |
ftleibnizopen:oai:oai.leibnizopen.de:eECQhIgBdbrxVwz6n43o 2023-06-18T03:40:02+02:00 Pliocene oceanic seaways and global climate Karas, Cyrus Nürnberg, Dirk Bahr, Andre Groeneveld, Jeroen Herrle, Jens O. Tiedemann, Ralf deMenocal, Peter B. 2017 https://repository.publisso.de/resource/frl:6416853 https://doi.org/10.1038/srep39842 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5215318/ https://www.nature.com/articles/srep39842#Sec6 eng eng http://creativecommons.org/licenses/by/4.0/ Scientific reports, 7:39842 bering strait overturning circulation indonesian throughflow closure evolution panama eastern tropical pacific central-american seaway palaeoclimate variability palaeoceanography equatorial pacific thermocline 2017 ftleibnizopen https://doi.org/10.1038/srep39842 2023-06-04T23:36:46Z Tectonically induced changes in oceanic seaways had profound effects on global and regional climate during the Late Neogene. The constriction of the Central American Seaway reached a critical threshold during the early Pliocene ~4.8–4 million years (Ma) ago. Model simulations indicate the strengthening of the Atlantic Meridional Overturning Circulation (AMOC) with a signature warming response in the Northern Hemisphere and cooling in the Southern Hemisphere. Subsequently, between ~4–3 Ma, the constriction of the Indonesian Seaway impacted regional climate and might have accelerated the Northern Hemisphere Glaciation. We here present Pliocene Atlantic interhemispheric sea surface temperature and salinity gradients (deduced from foraminiferal Mg/Ca and stable oxygen isotopes, δ18O) in combination with a recently published benthic stable carbon isotope (δ13C) record from the southernmost extent of North Atlantic Deep Water to reconstruct gateway-related changes in the AMOC mode. After an early reduction of the AMOC at ~5.3 Ma, we show in agreement with model simulations of the impacts of Central American Seaway closure a strengthened AMOC with a global climate signature. During ~3.8–3 Ma, we suggest a weakening of the AMOC in line with the global cooling trend, with possible contributions from the constriction of the Indonesian Seaway. Other/Unknown Material Bering Strait North Atlantic Deep Water North Atlantic LeibnizOpen (The Leibniz Association) Bering Strait Pacific Scientific Reports 7 1 |
institution |
Open Polar |
collection |
LeibnizOpen (The Leibniz Association) |
op_collection_id |
ftleibnizopen |
language |
English |
topic |
bering strait overturning circulation indonesian throughflow closure evolution panama eastern tropical pacific central-american seaway palaeoclimate variability palaeoceanography equatorial pacific thermocline |
spellingShingle |
bering strait overturning circulation indonesian throughflow closure evolution panama eastern tropical pacific central-american seaway palaeoclimate variability palaeoceanography equatorial pacific thermocline Karas, Cyrus Nürnberg, Dirk Bahr, Andre Groeneveld, Jeroen Herrle, Jens O. Tiedemann, Ralf deMenocal, Peter B. Pliocene oceanic seaways and global climate |
topic_facet |
bering strait overturning circulation indonesian throughflow closure evolution panama eastern tropical pacific central-american seaway palaeoclimate variability palaeoceanography equatorial pacific thermocline |
description |
Tectonically induced changes in oceanic seaways had profound effects on global and regional climate during the Late Neogene. The constriction of the Central American Seaway reached a critical threshold during the early Pliocene ~4.8–4 million years (Ma) ago. Model simulations indicate the strengthening of the Atlantic Meridional Overturning Circulation (AMOC) with a signature warming response in the Northern Hemisphere and cooling in the Southern Hemisphere. Subsequently, between ~4–3 Ma, the constriction of the Indonesian Seaway impacted regional climate and might have accelerated the Northern Hemisphere Glaciation. We here present Pliocene Atlantic interhemispheric sea surface temperature and salinity gradients (deduced from foraminiferal Mg/Ca and stable oxygen isotopes, δ18O) in combination with a recently published benthic stable carbon isotope (δ13C) record from the southernmost extent of North Atlantic Deep Water to reconstruct gateway-related changes in the AMOC mode. After an early reduction of the AMOC at ~5.3 Ma, we show in agreement with model simulations of the impacts of Central American Seaway closure a strengthened AMOC with a global climate signature. During ~3.8–3 Ma, we suggest a weakening of the AMOC in line with the global cooling trend, with possible contributions from the constriction of the Indonesian Seaway. |
author |
Karas, Cyrus Nürnberg, Dirk Bahr, Andre Groeneveld, Jeroen Herrle, Jens O. Tiedemann, Ralf deMenocal, Peter B. |
author_facet |
Karas, Cyrus Nürnberg, Dirk Bahr, Andre Groeneveld, Jeroen Herrle, Jens O. Tiedemann, Ralf deMenocal, Peter B. |
author_sort |
Karas, Cyrus |
title |
Pliocene oceanic seaways and global climate |
title_short |
Pliocene oceanic seaways and global climate |
title_full |
Pliocene oceanic seaways and global climate |
title_fullStr |
Pliocene oceanic seaways and global climate |
title_full_unstemmed |
Pliocene oceanic seaways and global climate |
title_sort |
pliocene oceanic seaways and global climate |
publishDate |
2017 |
url |
https://repository.publisso.de/resource/frl:6416853 https://doi.org/10.1038/srep39842 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5215318/ https://www.nature.com/articles/srep39842#Sec6 |
geographic |
Bering Strait Pacific |
geographic_facet |
Bering Strait Pacific |
genre |
Bering Strait North Atlantic Deep Water North Atlantic |
genre_facet |
Bering Strait North Atlantic Deep Water North Atlantic |
op_source |
Scientific reports, 7:39842 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1038/srep39842 |
container_title |
Scientific Reports |
container_volume |
7 |
container_issue |
1 |
_version_ |
1769004837053136896 |