Articles | Volume 16, issue 1
https://doi.org/10.5194/os-16-99-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-16-99-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Why did deep convection persist over four consecutive winters (2015–2018) southeast of Cape Farewell?
Patricia Zunino
CORRESPONDING AUTHOR
Altran Technologies, Technopôle Brest Iroise, Site du Vernis, 300 rue Pierre Rivoalon, 29200 Brest,
France
Herlé Mercier
CNRS, University of Brest, IRD, Ifremer, Laboratoire d'Océanographie
Physique et Spatiale (LOPS), IUEM, ZI de la pointe du diable, CS 10070 –
29280 Plouzané, France
Virginie Thierry
Ifremer, University of Brest, CNRS, IRD, Laboratoire d'Océanographie
Physique et Spatiale (LOPS), IUEM, ZI de la pointe du diable, CS 10070 –
29280 Plouzané, France
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Virginie Racapé, Patricia Zunino, Herlé Mercier, Pascale Lherminier, Laurent Bopp, Fiz F. Pérèz, and Marion Gehlen
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This study of a model–data comparison investigates the relationship between transport, air–sea flux and storage rate of Cant in the North Atlantic Subpolar Ocean over the past 53 years. It reveals the key role played by Central Water for storing Cant in the subtropical region and for supplying Cant into the deep ocean. The Cant transfer to the deep ocean occurred mainly north of the OVIDE section, and just a small fraction was exported to the subtropical gyre within the lower MOC.
This article is included in the Encyclopedia of Geosciences
Maribel I. García-Ibáñez, Fiz F. Pérez, Pascale Lherminier, Patricia Zunino, Herlé Mercier, and Paul Tréguer
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The heat content in the subpolar North Atlantic is in a new phase of long-term decrease from the mid-2000s, which intensified in 2013–2014. We focus on the pronounced heat content drop. In summer 2014, the MOC intensity was higher than the mean (2002–2012) and the heat transport was also relatively high. We show that the air–sea heat flux is responsible for most of the intense cooling. Concurrently, we observed freshwater content increase mainly explained by the air–sea freshwater flux.
This article is included in the Encyclopedia of Geosciences
María del Carmen García-Martínez, Manuel Vargas-Yáñez, Francina Moya, Patricia Zunino, and Begoña Bautista
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Revised manuscript not accepted
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This article is included in the Encyclopedia of Geosciences
Maribel I. García-Ibáñez, Patricia Zunino, Friederike Fröb, Lidia I. Carracedo, Aida F. Ríos, Herlé Mercier, Are Olsen, and Fiz F. Pérez
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This article is included in the Encyclopedia of Geosciences
P. Zunino, M. I. Garcia-Ibañez, P. Lherminier, H. Mercier, A. F. Rios, and F. F. Pérez
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Short summary
The region south of Cape Farewell (SCF) is recognized as a deep convection site. Convection deeper than 1300 m occurred SCF in 2015 and persisted during three additional winters. Extreme air–sea buoyancy fluxes caused the 2015 event. For the following winters, air–sea fluxes were close to the climatological average, but local cooling above 800 m and the advection below 1200 m of a fresh anomaly from the Labrador Sea decreased stratification and allowed for the persistence of deep convection.
The region south of Cape Farewell (SCF) is recognized as a deep convection site. Convection...