Impact of high Saharan dust inputs on dissolved iron distributions in the Mediterranean Sea. - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Geophysical Research Letters Année : 2002

Impact of high Saharan dust inputs on dissolved iron distributions in the Mediterranean Sea.

Cécile Guieu
Yann Bozec
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Géraldine Sarthou
Nathalie Leblond

Résumé

During the PROSOPE cruise (Sept. 1999) in the Mediterranean Sea, dissolved iron concentrations in seawater and iron and aluminium concentrations in aerosols collected on board were investigated. Concentrations in aerosols were about two times higher in the Tyrrhenian Sea than in the west (Alboran Sea). This was in good agreement with the observed increase in dissolved iron concentrations in the surface waters from West to East. Depth profiles were characterised by a maximum in the surface mixed layer. Using an in vitro experiment, iron released from Saharan dust during the season characterized by a stratified water column and a low primary productivity was estimated: it resulted in an accumulation of 0.5-0.8 nM dissolved iron, in good agreement with the observed iron enrichment in the surface water (0.8 nM). This study confirms the significance of atmospheric input of Saharan origin on the iron cycle in the Mediterranean Sea.
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Dates et versions

hal-00166825 , version 1 (26-01-2021)

Identifiants

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Cécile Guieu, Yann Bozec, Stéphane Blain, Céline Ridame, Géraldine Sarthou, et al.. Impact of high Saharan dust inputs on dissolved iron distributions in the Mediterranean Sea.. Geophysical Research Letters, 2002, 29 (19), pp.17-1-17-4. ⟨10.1029/2001GL014454⟩. ⟨hal-00166825⟩
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