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Importance of the Variability of Hydrographic Preconditioning for Deep Convection in the Gulf of Lion, NW Mediterranean : Volume 6, Issue 2 (14/06/2010)

By Grignon, L.

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Book Id: WPLBN0004020463
Format Type: PDF Article :
File Size: Pages 14
Reproduction Date: 2015

Title: Importance of the Variability of Hydrographic Preconditioning for Deep Convection in the Gulf of Lion, NW Mediterranean : Volume 6, Issue 2 (14/06/2010)  
Author: Grignon, L.
Volume: Vol. 6, Issue 2
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Schroeder, K., Bryden, H. L., Smeed, D. A., & Grignon, L. (2010). Importance of the Variability of Hydrographic Preconditioning for Deep Convection in the Gulf of Lion, NW Mediterranean : Volume 6, Issue 2 (14/06/2010). Retrieved from

Description: National Oceanography Centre, Southampton, UK. We study the variability of hydrographic preconditioning defined as the heat and salt contents in the Ligurian Sea before convection. The stratification is found to reach a maximum in the intermediate layer in December, whose causes and consequences for the interannual variability of convection are investigated. Further study of the interannual variability and correlation tests between the properties of the deep water formed and the winter surface fluxes support the description of convection as a process that transfers the heat and salt contents from the top and intermediate layers to the deep layer. A proxy for the rate of transfer is given by the final convective mixed layer depth, that is shown to depend equally on the surface fluxes and on the preconditioning. In particular, it is found that deep convection in winter 2004–2005 would have happened even with normal winter conditions, due to low pre-winter stratification.

Importance of the variability of hydrographic preconditioning for deep convection in the Gulf of Lion, NW Mediterranean

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