Gulf Stream intensification after the early Pliocene shoaling of the Central American Seaway
The shoaling of the Central American Seaway (CAS) around 4.6 Ma (million years ago) is thought to have enhanced the Gulf Stream, strengthening the Atlantic Meridional Overturning Circulation and potentially influencing the evolution of Pliocene climate. Paleoclimate records indicate a buildup of hea...
Published in: | Earth and Planetary Science Letters |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2019
|
Subjects: | |
Online Access: | https://boris.unibe.ch/131522/1/Auderset%20et%20al.,%2019.pdf https://boris.unibe.ch/131522/ |
id |
ftunivbern:oai:boris.unibe.ch:131522 |
---|---|
record_format |
openpolar |
spelling |
ftunivbern:oai:boris.unibe.ch:131522 2023-08-20T04:08:00+02:00 Gulf Stream intensification after the early Pliocene shoaling of the Central American Seaway Auderset, Alexandra Martinez-Garcia, Alfredo Tiedemann, Ralf Hasenfratz, Adam Eglinton, Tim I. Schiebel, Ralf Sigman, Daniel M. Haug, Gerald H. 2019-06 application/pdf https://boris.unibe.ch/131522/1/Auderset%20et%20al.,%2019.pdf https://boris.unibe.ch/131522/ eng eng Elsevier https://boris.unibe.ch/131522/ info:eu-repo/semantics/restrictedAccess Auderset, Alexandra; Martinez-Garcia, Alfredo; Tiedemann, Ralf; Hasenfratz, Adam; Eglinton, Tim I.; Schiebel, Ralf; Sigman, Daniel M.; Haug, Gerald H. (2019). Gulf Stream intensification after the early Pliocene shoaling of the Central American Seaway. Earth and planetary science letters, 520, pp. 268-278. Elsevier 10.1016/j.epsl.2019.05.022 <http://dx.doi.org/10.1016/j.epsl.2019.05.022> 550 Earth sciences & geology info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2019 ftunivbern https://doi.org/10.1016/j.epsl.2019.05.022 2023-07-31T21:52:44Z The shoaling of the Central American Seaway (CAS) around 4.6 Ma (million years ago) is thought to have enhanced the Gulf Stream, strengthening the Atlantic Meridional Overturning Circulation and potentially influencing the evolution of Pliocene climate. Paleoclimate records indicate a buildup of heat and salt in the Caribbean and changes in the formation of North Atlantic Deep Water (NADW) associated with a major step in the shoaling of the CAS at 4.6 Ma. However, so far, direct evidence supporting an intensification of the Gulf Stream is scarce. Here we report new North Atlantic early Pliocene (5.3–3.9 Ma) records of sea surface temperature (SST) reconstructed using the UK37’ and TEX86 paleotemperature indices. Based on new sediment trap measurements near the study site, we suggest that in this particular region, the two paleothermometers record SST during different seasons: spring for UK37’ and summer for TEX86. At 4.6 and 4.2 Ma, our results indicate substantial increases in SST and salinity during summer but not spring, pointing to a significant intensification of the Gulf Stream and its extension, the North Atlantic Current, after the shoaling of the CAS. The divergence of the UK37’ and TEX86 temperature trends in those intervals suggests that the Gulf Stream intensification contributed to the strong North Atlantic seasonality that is observed today Article in Journal/Newspaper NADW north atlantic current North Atlantic Deep Water North Atlantic BORIS (Bern Open Repository and Information System, University of Bern) Earth and Planetary Science Letters 520 268 278 |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
550 Earth sciences & geology |
spellingShingle |
550 Earth sciences & geology Auderset, Alexandra Martinez-Garcia, Alfredo Tiedemann, Ralf Hasenfratz, Adam Eglinton, Tim I. Schiebel, Ralf Sigman, Daniel M. Haug, Gerald H. Gulf Stream intensification after the early Pliocene shoaling of the Central American Seaway |
topic_facet |
550 Earth sciences & geology |
description |
The shoaling of the Central American Seaway (CAS) around 4.6 Ma (million years ago) is thought to have enhanced the Gulf Stream, strengthening the Atlantic Meridional Overturning Circulation and potentially influencing the evolution of Pliocene climate. Paleoclimate records indicate a buildup of heat and salt in the Caribbean and changes in the formation of North Atlantic Deep Water (NADW) associated with a major step in the shoaling of the CAS at 4.6 Ma. However, so far, direct evidence supporting an intensification of the Gulf Stream is scarce. Here we report new North Atlantic early Pliocene (5.3–3.9 Ma) records of sea surface temperature (SST) reconstructed using the UK37’ and TEX86 paleotemperature indices. Based on new sediment trap measurements near the study site, we suggest that in this particular region, the two paleothermometers record SST during different seasons: spring for UK37’ and summer for TEX86. At 4.6 and 4.2 Ma, our results indicate substantial increases in SST and salinity during summer but not spring, pointing to a significant intensification of the Gulf Stream and its extension, the North Atlantic Current, after the shoaling of the CAS. The divergence of the UK37’ and TEX86 temperature trends in those intervals suggests that the Gulf Stream intensification contributed to the strong North Atlantic seasonality that is observed today |
format |
Article in Journal/Newspaper |
author |
Auderset, Alexandra Martinez-Garcia, Alfredo Tiedemann, Ralf Hasenfratz, Adam Eglinton, Tim I. Schiebel, Ralf Sigman, Daniel M. Haug, Gerald H. |
author_facet |
Auderset, Alexandra Martinez-Garcia, Alfredo Tiedemann, Ralf Hasenfratz, Adam Eglinton, Tim I. Schiebel, Ralf Sigman, Daniel M. Haug, Gerald H. |
author_sort |
Auderset, Alexandra |
title |
Gulf Stream intensification after the early Pliocene shoaling of the Central American Seaway |
title_short |
Gulf Stream intensification after the early Pliocene shoaling of the Central American Seaway |
title_full |
Gulf Stream intensification after the early Pliocene shoaling of the Central American Seaway |
title_fullStr |
Gulf Stream intensification after the early Pliocene shoaling of the Central American Seaway |
title_full_unstemmed |
Gulf Stream intensification after the early Pliocene shoaling of the Central American Seaway |
title_sort |
gulf stream intensification after the early pliocene shoaling of the central american seaway |
publisher |
Elsevier |
publishDate |
2019 |
url |
https://boris.unibe.ch/131522/1/Auderset%20et%20al.,%2019.pdf https://boris.unibe.ch/131522/ |
genre |
NADW north atlantic current North Atlantic Deep Water North Atlantic |
genre_facet |
NADW north atlantic current North Atlantic Deep Water North Atlantic |
op_source |
Auderset, Alexandra; Martinez-Garcia, Alfredo; Tiedemann, Ralf; Hasenfratz, Adam; Eglinton, Tim I.; Schiebel, Ralf; Sigman, Daniel M.; Haug, Gerald H. (2019). Gulf Stream intensification after the early Pliocene shoaling of the Central American Seaway. Earth and planetary science letters, 520, pp. 268-278. Elsevier 10.1016/j.epsl.2019.05.022 <http://dx.doi.org/10.1016/j.epsl.2019.05.022> |
op_relation |
https://boris.unibe.ch/131522/ |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2019.05.022 |
container_title |
Earth and Planetary Science Letters |
container_volume |
520 |
container_start_page |
268 |
op_container_end_page |
278 |
_version_ |
1774720031776571392 |