FN Archimer Export Format
PT J
TI Contrasted release of insoluble elements (Fe, Al, rare earth elements, Th, Pa) after dust deposition in seawater: a tank experiment approach
BT 
AF Roy-Barman, Matthieu
   Foliot, Lorna
   DOUVILLE, Eric
   Leblond, Nathalie
   Gazeau, Frédéric
   Bressac, Matthieu
   Wagener, Thibaut
   Ridame, Céline
   Desboeufs, Karine
   Guieu, Cécile
AS 1:1;2:1;3:1;4:2;5:3;6:3,4;7:5;8:6;9:7;10:3;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;
C1 Université Paris-Saclay, CNRS, CEA, UVSQ, Laboratoire des Sciences du Climat et de l'Environnement, 91191, Gif-sur-Yvette, France
   Sorbonne Université, CNRS, Institut de la Mer de Villefranche, IMEV, F-06230 Villefranche-sur-Mer, France
   Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, LOV, F-06230 Villefranche-sur-Mer, France
   Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania, Australia
   Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
   Sorbonne Université, LOCEAN, 4 Place Jussieu – 75252 Paris Cedex 05, France
   LISA, UMR7583, Université de Paris, Université Paris-Est-Créteil, Institut Pierre Simon Laplace (IPSL), Créteil, France
C2 UNIV PARIS-SACLAY, FRANCE
   UNIV SORBONNE, FRANCE
   UNIV SORBONNE, FRANCE
   UNIV TASMANIA, AUSTRALIA
   UNIV AIX MARSEILLE, FRANCE
   UNIV SORBONNE, FRANCE
   IPSL, FRANCE
IN DOAJ
TC 0
UR https://archimer.ifremer.fr/doc/00642/75456/76274.pdf
   https://archimer.ifremer.fr/doc/00642/75456/76275.pdf
   https://archimer.ifremer.fr/doc/00642/75456/83425.pdf
   https://archimer.ifremer.fr/doc/00642/75456/83426.pdf
LA English
DT Article
CR PEACETIME
BO Pourquoi pas ?
AB The release of lithogenic elements (which are often assumed to be insoluble) such as Aluminum (Al), Iron (Fe), Rare Earth Elements (REE), Thorium (Th) and Protactinium (Pa) by Saharan dust reaching Mediterranean seawater was studied through tank experiments over 3 to 4 days under controlled conditions including control without dust addition and dust seeding under present and future climate conditions (+3 °C and −0.3 pH unit). Unfiltered surface seawater from 3 oligotrophic regions (Tyrrhenian Sea, Ionian Sea and Algerian Basin) were used. The maximum dissolution fractions were low for all seeding experiments: less than 0.3 % for Fe, 1 % for 232Th and Al, about 2–5 % for REE and less than 6 % for Pa. Different behaviors were observed: dissolved Al increased until the end of the experiments, Fe did not dissolve significantly and Th and light REE were scavenged back on the particles after a fast initial release. The constant 230Th/232Th ratio during the scavenging phase suggests that there is little or no further dissolution after the initial Th release. Quite unexpectedly, comparison of present and future conditions indicates that changes in temperature and/or pH influence the release of thorium and REE in seawater, leading to a lower Th release and a higher light REE release under increased greenhouse conditions. 
PY 2020
SO Biogeosciences
SN 1726-4189
PU Copernicus GmbH
VL 18
IS 8
BP 2663
EP 2678
DI 10.5194/bg-2020-247
ID 75456
ER

EF