FN Archimer Export Format
PT J
TI Thorium isotopes in the Southeast Atlantic Ocean: Tracking scavenging during water mass mixing along neutral density surfaces
BT 
AF Roy-Barman, Matthieu
   Thil, François
   Bordier, Louise
   Dapoigny, Arnaud
   Foliot, Lorna
   Ayrault, Sophie
   Lacan, François
   Jeandel, Catherine
   Pradoux, Catherine
   Garcia-Solsona, Ester
AS 1:1;2:1;3:1;4:1;5:1;6:1;7:2;8:2;9:2;10:2,3;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;
C1 Laboratoire des Sciences du Climat et de l’Environnement, LSCE-IPSL (CEA CNRS UVSQ), Université Paris-Saclay, Orme des Merisiers - centre de Saclay, 91191, Gif-sur-Yvette, France
   LEGOS (CNRS/CNES/IRD/Université de Toulouse), Observatoire Midi-Pyrénées, 31400, Toulouse, France
   Dinàmica de la Terra i de l’Oceà, Facultat de Ciències de la Terra, Universitat de Barcelona, 08028, Barcelona, Spain
C2 LSCE, FRANCE
   LEGOS, FRANCE
   UNIV BARCELONA, SPAIN
IF 2.606
TC 5
UR https://archimer.ifremer.fr/doc/00496/60810/85381.pdf
LA English
DT Article
CR MD 166 / BONUS-GOODHOPE
BO Marion Dufresne
DE ;Thorium isotopes;Southern ocean;Atlantic;Marine particles;Isopycnal mixing
AB The distributions of dissolved and particulate thorium isotopes (230Th and 232Th) were established in samples from the BONUS GoodHope (BGH) IPY-GEOTRACES cruise in the SE Atlantic sector of the Southern Ocean (36°S-13°E to 57°S-0°, Feb.–Mar. 2008). The distribution of total (dissolved + particulate) 232Th is dominated by the inputs from continental margins. The non-linear profiles of dissolved 230Th are interpreted as due to the southward upwelling of the isopycnal surfaces. However, total 230Th and 232Th versus salinity plots illustrate departures from binary mixing and provides evidence for non-conservative behavior of both isotopes along the section. We propose a model for total 230Th and 232Th scavenging and mixing along isopycnal surfaces. We use this model to estimate particle settling speeds and isopycnal eddy diffusion coefficients along the BGH section. Data-model comparison suggests particle settling velocities in the range of 400–700 m/y and isopycnal eddy diffusivity of the order of 2000 m2/s. 
PY 2019
PD JUN
SO Deep-sea Research Part I-oceanographic Research Papers
SN 0967-0637
PU Elsevier BV
VL 149
UT 000483410100011
DI 10.1016/j.dsr.2019.05.002
ID 60810
ER

EF