Impact of Dense Water Formation on the Transfer of Particles and Trace Metals from the Coast to the Deep in the Northwestern Mediterranean

Type Article
Date 2023-01
Language English
Author(s) Durrieu De Madron Xavier1, Aubert D.ORCID1, Charrière B.ORCID1, Kunesch S.1, Menniti C.1, Radakovitch O.2, Sola J.1
Affiliation(s) 1 : Centre de Formation et de Recherche sur les Environnements Méditerranéens, UMR 5110, CNRS-Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, 66860 Perpignan, France
2 : Institut de Radioprotection et de Sûreté Nucléaire, PSE/SRTE/LRTA, BP 3, 13115 Saint-Paul-Lez-Durance, France
Source Water (2073-4441) (MDPI AG), 2023-01 , Vol. 15 , N. 2 , P. 301 (19p.)
DOI 10.3390/w15020301
WOS© Times Cited 1
Note This article belongs to the Special Issue Impact of Atmospheric and River Inputs on the Transfer of Elements and Organic Matter to the Ocean
Keyword(s) dense water formation, cascading, convection, Mediterranean, particulate flux, metals, long term changes

This study aimed to describe the interannual variability of dense shelf water cascading and open ocean convection in the Gulf of Lions (NW Mediterranean) based on long-term temperature and current records and its impact on particle fluxes and associated metals. These observations highlight the predominant role of the rare intense events of dense shelf water cascading (1999/2000, 2005/2006, 2012/2013) in the basinward export of particles, which are mainly brought by rivers. Measurements of particulate trace metals in 2012 indicate that the monitored intense cascading event may be responsible for a significant fraction (~15%) of the annual input to the shelf. To this first process is added the effect of somehow more recurrent deep convection events (2005, 2009–2013) that remobilize the deep sediments, receptacle of coastal inputs, and disperse them rapidly at the scale of the northern Mediterranean basin, and gradually over the entire western basin. Coastal and oceanic dense water formations are key physical processes in the Mediterranean margins, whose reduction in intensity and recurrence has already been observed and also anticipate in climate scenarios that will likely change the dispersion pathways of chemical particles in this region.

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Durrieu De Madron Xavier, Aubert D., Charrière B., Kunesch S., Menniti C., Radakovitch O., Sola J. (2023). Impact of Dense Water Formation on the Transfer of Particles and Trace Metals from the Coast to the Deep in the Northwestern Mediterranean. Water, 15(2), 301 (19p.). Publisher's official version : , Open Access version :