The GEOVIDE cruise in May–June 2014 reveals an intense Meridional Overturning Circulation over a cold and fresh subpolar North Atlantic
The GEOVIDE cruise was carried out in the subpolar North Atlantic (SPNA) along the OVIDE section and across the Labrador Sea in May–June 2014. It was planned to clarify the distribution of the trace elements and their isotopes in the SPNA as part of the GEOTRACES international program. This paper fo...
Published in: | Biogeosciences |
---|---|
Main Authors: | , , , , , |
Format: | Text |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://doi.org/10.5194/bg-14-5323-2017 https://www.biogeosciences.net/14/5323/2017/ |
id |
ftcopernicus:oai:publications.copernicus.org:bg60242 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:bg60242 2023-05-15T17:06:11+02:00 The GEOVIDE cruise in May–June 2014 reveals an intense Meridional Overturning Circulation over a cold and fresh subpolar North Atlantic Zunino, Patricia Lherminier, Pascale Mercier, Herlé Daniault, Nathalie García-Ibáñez, Maribel I. Pérez, Fiz F. 2018-09-27 application/pdf https://doi.org/10.5194/bg-14-5323-2017 https://www.biogeosciences.net/14/5323/2017/ eng eng doi:10.5194/bg-14-5323-2017 https://www.biogeosciences.net/14/5323/2017/ eISSN: 1726-4189 Text 2018 ftcopernicus https://doi.org/10.5194/bg-14-5323-2017 2019-12-24T09:50:49Z The GEOVIDE cruise was carried out in the subpolar North Atlantic (SPNA) along the OVIDE section and across the Labrador Sea in May–June 2014. It was planned to clarify the distribution of the trace elements and their isotopes in the SPNA as part of the GEOTRACES international program. This paper focuses on the state of the circulation and distribution of thermohaline properties during the cruise. In terms of circulation, the comparison with the 2002–2012 mean state shows a more intense Irminger Current and also a weaker North Atlantic Current, with a transfer of volume transport from its northern to its central branch. However, those anomalies are compatible with the variability already observed along the OVIDE section in the 2000s. In terms of properties, the surface waters of the eastern SPNA were much colder and fresher than the averages over 2002–2012. In spite of negative temperature anomalies in the surface waters, the heat transport across the OVIDE section estimated at 0.56 ± 0.06 PW was the largest measured since 2002. This relatively large value is related to the relatively strong Meridional Overturning Circulation measured across the OVIDE section during GEOVIDE (18.7 ± 3.0 Sv). By analyzing the air–sea heat and freshwater fluxes over the eastern SPNA in relation to the heat and freshwater content changes observed during 2013 and 2014, we concluded that on a short timescale these changes were mainly driven by air–sea heat and freshwater fluxes rather than by ocean circulation. Text Labrador Sea north atlantic current North Atlantic Copernicus Publications: E-Journals Biogeosciences 14 23 5323 5342 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
The GEOVIDE cruise was carried out in the subpolar North Atlantic (SPNA) along the OVIDE section and across the Labrador Sea in May–June 2014. It was planned to clarify the distribution of the trace elements and their isotopes in the SPNA as part of the GEOTRACES international program. This paper focuses on the state of the circulation and distribution of thermohaline properties during the cruise. In terms of circulation, the comparison with the 2002–2012 mean state shows a more intense Irminger Current and also a weaker North Atlantic Current, with a transfer of volume transport from its northern to its central branch. However, those anomalies are compatible with the variability already observed along the OVIDE section in the 2000s. In terms of properties, the surface waters of the eastern SPNA were much colder and fresher than the averages over 2002–2012. In spite of negative temperature anomalies in the surface waters, the heat transport across the OVIDE section estimated at 0.56 ± 0.06 PW was the largest measured since 2002. This relatively large value is related to the relatively strong Meridional Overturning Circulation measured across the OVIDE section during GEOVIDE (18.7 ± 3.0 Sv). By analyzing the air–sea heat and freshwater fluxes over the eastern SPNA in relation to the heat and freshwater content changes observed during 2013 and 2014, we concluded that on a short timescale these changes were mainly driven by air–sea heat and freshwater fluxes rather than by ocean circulation. |
format |
Text |
author |
Zunino, Patricia Lherminier, Pascale Mercier, Herlé Daniault, Nathalie García-Ibáñez, Maribel I. Pérez, Fiz F. |
spellingShingle |
Zunino, Patricia Lherminier, Pascale Mercier, Herlé Daniault, Nathalie García-Ibáñez, Maribel I. Pérez, Fiz F. The GEOVIDE cruise in May–June 2014 reveals an intense Meridional Overturning Circulation over a cold and fresh subpolar North Atlantic |
author_facet |
Zunino, Patricia Lherminier, Pascale Mercier, Herlé Daniault, Nathalie García-Ibáñez, Maribel I. Pérez, Fiz F. |
author_sort |
Zunino, Patricia |
title |
The GEOVIDE cruise in May–June 2014 reveals an intense Meridional Overturning Circulation over a cold and fresh subpolar North Atlantic |
title_short |
The GEOVIDE cruise in May–June 2014 reveals an intense Meridional Overturning Circulation over a cold and fresh subpolar North Atlantic |
title_full |
The GEOVIDE cruise in May–June 2014 reveals an intense Meridional Overturning Circulation over a cold and fresh subpolar North Atlantic |
title_fullStr |
The GEOVIDE cruise in May–June 2014 reveals an intense Meridional Overturning Circulation over a cold and fresh subpolar North Atlantic |
title_full_unstemmed |
The GEOVIDE cruise in May–June 2014 reveals an intense Meridional Overturning Circulation over a cold and fresh subpolar North Atlantic |
title_sort |
geovide cruise in may–june 2014 reveals an intense meridional overturning circulation over a cold and fresh subpolar north atlantic |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-14-5323-2017 https://www.biogeosciences.net/14/5323/2017/ |
genre |
Labrador Sea north atlantic current North Atlantic |
genre_facet |
Labrador Sea north atlantic current North Atlantic |
op_source |
eISSN: 1726-4189 |
op_relation |
doi:10.5194/bg-14-5323-2017 https://www.biogeosciences.net/14/5323/2017/ |
op_doi |
https://doi.org/10.5194/bg-14-5323-2017 |
container_title |
Biogeosciences |
container_volume |
14 |
container_issue |
23 |
container_start_page |
5323 |
op_container_end_page |
5342 |
_version_ |
1766061217240055808 |