Ocean Science
Ocean Science
OS
Articles | Volume 16, issue 1
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.
https://doi.org/10.5194/os-16-99-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 16, issue 1
Research article
 | Highlight paper
 | 
20 Jan 2020
Research article | Highlight paper |  | 20 Jan 2020

Why did deep convection persist over four consecutive winters (2015–2018) southeast of Cape Farewell?

Patricia Zunino, Herlé Mercier, and Virginie Thierry

Supplement

https://doi.org/10.5194/os-16-99-2020-supplement

Data sets

Argo float data and metadata from Global Data Assembly Centre (Argo GDAC) Argo group https://doi.org/10.17882/42182

ISAS-15 temperature and salinity gridded fields N. Kolodziejczyk, A. Prigent-Mazella, and F. Gaillard https://doi.org/10.17882/52367

The ERA-Interim reanalysis: Configuration and performance of the data assimilation system (https://www.ecmwf.int/en/forecasts/datasets/reanalysis-datasets/era-interim) D. P. Dee, S. M. Uppala, A. J. Simmons, P. Berrisford, P. Poli, S. Kobayashi, and F. Vitart https://doi.org/10.1002/qj.828

EN4: Quality controlled ocean temperature and salinity profiles and monthly objective analyses with uncertainty estimates (http://hadobs.metoffice.com/en4/download.html) S. A. Good, M. J. Martin, and N. A. Rayner https://doi.org/10.1002/2013JC009067

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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.
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