%0 Journal Article
%T Does phosphate adsorption onto Saharan dust explain the unusual N/P ratio in the Mediterranean Sea ?
%+ Institut fur Meerskunde
%+ Laboratoire d'océanographie et de biogéochimie (LOB)
%+ Laboratoire d'océanographie de Villefranche (LOV)
%A Ridame, Céline
%A Moutin, Thierry
%A Guieu, Cécile
%< avec comité de lecture
%@ 0399-1784
%J Oceanologica Acta
%I Elsevier
%V 26
%N 5-6
%P 629-634
%8 2003
%D 2003
%R 10.1016/S0399-1784(03)00061-6
%Z Sciences of the Universe [physics]/Ocean, AtmosphereJournal articles
%X A Saharan soil, considered as a proxy for Saharan aerosols, was used to perform radio-labelled phosphate adsorption experiments using <sup>33</sup>PO<sub>4</sub><sup>3-</sup>: leached particles were exposed to poisoned western Mediterranean seawater for varying lengths of time. The measured adsorption capacity of Saharan dust for phosphate was 0.13 µmol.g<sup>-1</sup>. Considering this value and an annual Saharan dust deposition of 12.5 t.km<sup>-2</sup>.yr<sup>-1</sup>, we show that Saharan particles do not represent a significant sink for seawater phosphate in the western Mediterranean Sea. This result is in agreement with that determined from a similar approach conducted in the eastern basin. As a consequence, the unusual N/P ratio measured in the whole Mediterranean Sea (up to 29) can not be explained by the adsorption process of seawater phosphate onto Saharan dust.
%G English
%L hal-00166835
%U https://hal.science/hal-00166835
%~ INSU
%~ UPMC
%~ CNRS
%~ UNIV-AMU
%~ GIP-BE
%~ LOPB
%~ LOV
%~ UPMC_POLE_3
%~ SORBONNE-UNIVERSITE
%~ SU-SCIENCES
%~ SU-SCI
%~ UMS-829
%~ UNIV-PARIS
%~ SU-TI
%~ LOV_CHOC
%~ ALLIANCE-SU