FN Archimer Export Format
PT J
TI Sources and exchanges of mercury in the waters of the Northwestern Mediterranean margin
BT 
AF COSSA, Daniel
   DE MADRON, Xavier Durrieu
   SCHAFER, Jorg
   GUEDRON, Stephane
   MARUSCZAK, Nicolas
   CASTELLE, Sabine
   NAUDIN, Jean-Jacques
AS 1:1,2;2:3;3:4;4:2;5:1;6:1;7:5;
FF 1:PDG-RBE-BE-LBCM;2:;3:;4:;5:;6:;7:;
C1 IFREMER, Mediterranean Ctr, BP 330, F-83507 La Seyne Sur Mer, France.
   Univ Grenoble Alpes, ISTerre, BP 53, F-38041 Grenoble, France.
   Univ Perpignan, CNRS CEFREM, 52 Ave P Alduy, F-66860 Perpignan, France.
   Univ Bordeaux, EPOC, F-33615 Pessac, France.
   Univ P&M Curie, Lobb, F-66651 Banyuls Sur Mer, France.
C2 IFREMER, FRANCE
   UNIV GRENOBLE ALPES, FRANCE
   UNIV PERPIGNAN, FRANCE
   UNIV BORDEAUX, FRANCE
   UNIV PARIS 06, FRANCE
SI TOULON
SE PDG-RBE-BE-LBCM
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 3.245
TC 12
UR https://archimer.ifremer.fr/doc/00384/49563/50055.pdf
LA English
DT Article
CR BIOPRHOFI
   CASCADE
BO Le Suroît
   L'Atalante
DE ;Mercury;Ocean margin;Coastal area;Mediterranean
AB Ocean margins are focal regions in terms of mercury (Hg) exchanges between the continent and the open sea. The aim of this paper is to describe the distribution and partition of Hg between the gaseous, dissolved and particulate phases in the waters of the Northwestern Mediterranean (NWM) margin, in order to assess the Hg sources and exchanges within the continuum between the continental shelf (Gulf of Lions) and the open sea (Northern Gyre). Mean (± standard deviation) of total Hg species (HgT) concentrations in unfiltered water samples were 1.52 ± 1.00 pmol L-1 (n=36) in the inner shelf, 1.09 ± 0.15 pmol L-1 (n=30) along the slope, and 1.10 ± 0.13 pmol L-1 (n=99) in the Northern Gyre. The dissolved phase (<0.45µm) average concentrations were 0.80 ± 0.47 pmol L-1 (n=37) in the inner shelf, 0.93 ± 0.20 pmol L-1 (n=4) along the slope and 0.84 ± 0.10 (n=20) pmol L-1 in the Northern Gyre. The particulate fraction of Hg decreased very strongly seaward from around 60% on the shelf to 10-25% above the Northern Gyre. Very low dissolved HgT concentrations occurred in the inner shelf water, consistent with the results of incubation experiments, which demonstrated that shelf water is very efficient in both production and release of dissolved gaseous Hg into the atmosphere. In the North Gyre waters column HgT presents a distribution pattern inverse to that of dissolved oxygen, and a slight Hg enrichment in the deep layer (Western Mediterranean Deep Water). The Hg from the open sea water is the largest Hg input to the Gulf of Lions (∼5.7 kmol yr-1), whereas inputs from the riverine source account for ∼3.4 kmol yr-1 and atmospheric deposition for less than 0.5 kmol yr-1. The Hg accumulated in the sediments of the shelf is ∼4.5 kmol yr-1, including 0.6-1.7 kmol yr-1 in the Rhône prodelta sediments. The evasion to the atmosphere represents a Hg flux of ∼2.6 kmol yr-1. 
PY 2018
PD APR
SO Progress In Oceanography
SN 0079-6611
PU Pergamon-elsevier Science Ltd
VL 163
UT 000434004400015
BP 172
EP 183
DI 10.1016/j.pocean.2017.05.002
ID 49563
ER

EF