FN Archimer Export Format
PT J
TI Dissolved Pb and Pb isotopes in the North Atlantic from the GEOVIDE transect (GEOTRACES GA-01) and their decadal evolution
BT 
AF ZURBRICK, Cheryl M.
   BOYLE, Edward A.
   KAYSER, Richard J.
   REUER, Matthew K.
   WU, Jinfeng
   PLANQUETTE, Helene
   SHELLEY, Rachel
   BOUTORH, Julia
   CHEIZE, Marie
   CONTREIRA, Leonardo
   BARRAQUETA, Jan-Lukas Menzel
   LACAN, Francois
   SARTHOU, Geraldine
AS 1:1;2:1;3:1;4:1;5:1,7;6:8;7:2,6;8:2;9:2;10:3;11:4;12:5;13:8;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;
C1 MIT, Earth Atmospher & Planetary Sci, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
   Univ Europeien Mer, Lab Sci Environm Marin LEMAR, Technopoole Brest Iroise 13, F-29280 Plouzanei, France.
   Univ Fed Rio Grande FURG, Inst Oceanog, Rio Grande, Brazil.
   Helmholtz Ctr Ocean Res, GEOMAR, Wischhofstr 1-3,Build 12, D-24148 Kiel, Germany.
   Univ Toulouse, CNRS, Observ Midi Pyrenees, LEGOS,CNES,IRD,UPS, 14 Ave Edouard Belin, F-31400 Toulouse, France.
   Florida State Univ, Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA.
   Shenzhen Univ, Coll Life Sci & Oceanog, Shenzhen, Peoples R China.
C2 MIT, USA
   UBO, FRANCE
   UNIV FED RIO GRANDE FURG, BRAZIL
   HELMHOLTZ CTR OCEAN RES, GERMANY
   UNIV TOULOUSE, FRANCE
   UNIV FLORIDA STATE, USA
   UNIV SHENZHEN, CHINA
   CNRS, FRANCE
UM LEMAR
IN DOAJ
IF 3.951
TC 20
UR https://archimer.ifremer.fr/doc/00456/56760/58607.pdf
   https://archimer.ifremer.fr/doc/00456/56760/58609.pdf
   https://archimer.ifremer.fr/doc/00456/56760/58611.pdf
   https://archimer.ifremer.fr/doc/00456/56760/58612.pdf
LA English
DT Article
CR GEOVIDE
BO Pourquoi pas ?
AB During the 2014 GEOVIDE transect, seawater samples were collected for dissolved Pb and Pb isotope analysis. These samples provide a high-resolution "snapshot" of the source regions for the present Pb distribution in the North Atlantic Ocean. Some of these stations were previously occupied for Pb from as early as 1981, and we compare the 2014 data with these older data, some of which are reported here for the first time. Lead concentrations were highest in subsurface Mediterranean Water (MW) near the coast of Portugal, which agrees well with other recent observations by the US GEOTRACES program (Noble et al., 2015). The recently formed Labrador Sea Water (LSW) between Greenland and Nova Scotia is much lower in Pb concentration than the older LSW found in the West European Basin due to decreases in Pb emissions into the atmosphere during the past 20 years. Comparison of North Atlantic data from 1989 to 2014 shows decreasing Pb concentrations consistent with decreased anthropogenic inputs, active scavenging, and advection/convection. Although the isotopic composition of northern North Atlantic seawater appears more homogenous compared to previous decades, a clear spatiotemporal trend in isotope ratios is evident over the past 15 years and implies that small changes to atmospheric Pb emissions continue. Emissions data indicate that the relative proportions of US and European Pb sources to the ocean have been relatively uniform during the past 2 decades, while aerosol data may suggest a greater relative proportion of natural mineral Pb. Using our measurements in conjunction with emissions inventories, we support the findings of previous atmospheric analyses that a significant portion of the Pb deposited to the ocean in 2014 was natural, although it is obscured by the much greater solubility of anthropogenic aerosols over natural ones.
PY 2018
PD AUG
SO Biogeosciences
SN 1726-4170
PU Copernicus Gesellschaft Mbh
VL 15
IS 16
UT 000442399400004
BP 4995
EP 5014
DI 10.5194/bg-15-4995-2018
ID 56760
ER

EF