FN Archimer Export Format
PT J
TI Mercury distribution and transport in the North Atlantic Ocean along the GEOTRACES-GA01 transect
BT 
AF COSSA, Daniel
   HEIMBURGER, Lars-Eric
   PEREZ, Fiz F
   GARCIA-IBANEZ, Maria Isabel
   SONKE, Jeroen E.
   PLANQUETTE, Helene
   LHERMINIER, Pascale
   BOUTORH, Julia
   CHEIZE, Marie
   BARRAQUETA, Jan Lukas Menzel
   SHELLEY, Rachel
   SARTHOU, Geraldine
AS 1:1;2:2;3:3;4:3,4;5:5;6:6;7:7;8:6;9:6;10:8;11:6;12:6;
FF 1:;2:;3:;4:;5:;6:;7:PDG-ODE-LOPS-OH;8:;9:;10:;11:;12:;
C1 Univ Grenoble Alpes, ISTerre, CS 40700, F-38058 Grenoble 9, France.
   Aix Marseille Univ, Univ Toulon, CNRS INSU, MIO,UM 110,IRD, Marseille, France.
   CSIC, Inst Invest Marinas, Eduardo Cabello 6, Vigo 36208, Spain.
   Bjerknes Ctr Climate Res, Uni Res Climate, N-5008 Bergen, Norway.
   CNRS, GET OMP, 14 Ave E Belin, F-31240 Toulouse, France.
   Univ Bretagne Occidentale, LEMAR, F-29280 Plouzane, France.
   IFREMER, Brittany Ctr, LPO, BP 70, F-29280 Plouzane, France.
   Helmholtz Ctr Ocean Res, GEOMAR, D-24148 Kiel, Germany.
C2 UNIV GRENOBLE ALPES, FRANCE
   UNIV AIX MARSEILLE, FRANCE
   CSIC, SPAIN
   BCCR, NORWAY
   CNRS, FRANCE
   UBO, FRANCE
   IFREMER, FRANCE
   HELMHOLTZ CTR OCEAN RES, GERMANY
SI BREST
SE PDG-ODE-LOPS-OH
UM LOPS
   LEMAR
IN WOS Ifremer jusqu'en 2018
   DOAJ
   copubli-france
   copubli-europe
   copubli-univ-france
IF 3.951
TC 27
UR https://archimer.ifremer.fr/doc/00412/52303/53071.pdf
   https://archimer.ifremer.fr/doc/00412/52303/53072.pdf
   https://archimer.ifremer.fr/doc/00412/52303/56301.pdf
   https://archimer.ifremer.fr/doc/00412/52303/56302.pdf
LA English
DT Article
CR GEOVIDE
BO Pourquoi pas ?
AB We report here the results of total mercury (HgT) determinations along the 2014 GEOTRACES GEOVIDE cruise (GA01 transect) in the North Atlantic Ocean (NA) from Lisbon (Portugal) to the Labrador coast (Canada). Ninety-seven percent of the HgT concentrations of unfiltered samples (HgTUNF) ranged between 0.16 and 1.00 pmol L−1. The geometric mean was 0.51 pmol L−1 for the 535 samples analysed. The dissolved fraction (< 0.45 μm) of HgT, determined on 141 samples, averaged 78 % of the HgTUNF for the whole water column. HgTUNF concentrations increased eastwards and with depth from Greenland to Europe and from sub-surface to bottom waters, respectively. The Hg distribution mirrored that of dissolved oxygen concentration, with highest HgTUNF levels associated with oxygen-depleted zones. The statistically significant (p <  0.01) relationship between HgTF (filtered samples) and the apparent oxygen utilization confirms the nutrient-like behavior of Hg in the NA. An extended Optimum Multiparameter Analysis allowed us to characterize HgTUNF concentrations in the different Source Water Types (SWTs) present along the transect. Mean HgTUNF concentrations ranged from 0.26 ± 0.03 pmol L−1 in the Irminger Subpolar Mode Water to 1.02 ± 0.02 pmol L−1 in the lower North East Atlantic Deep Water. Anthropogenic Hg-enriched SWTs were found in the upper oceanic layers (i.e., East North Atlantic Central Water and Subarctic Intermediate Water). The change in anthropogenic Hg concentrations in the Labrador Sea Water, during its eastward journey, suggests a continuous decrease of Hg content in this water mass over the last decades. Calculation of the water transport driven by the Atlantic Meridional Overturning Circulation across the Portugal-Greenland transect indicates a northward Hg transport within the upper limb, and a southward Hg transport within the lower limb, with a resulting net transport from low latitudes to the polar zones of about 111 kmol yr−1. 
PY 2018
PD APR
SO Biogeosciences
SN 1726-4170
PU Copernicus Gesellschaft Mbh
VL 15
IS 8
UT 000430485900002
BP 2309
EP 2323
DI 10.5194/bg-15-2309-2018
ID 52303
ER

EF