(Table 1) Dissolved Hafnium and Neodymium in the South Atlantic measured on water bottle samples during POLARSTERN cruise ANT-XXIV/3 ...

We present the first combined dissolved hafnium (Hf) and neodymium (Nd) concentrations and isotope compositions of deep water masses from the Atlantic sector of the Southern Ocean. Eight full depth profiles were analyzed for Hf and twelve for Nd. Hafnium concentrations are generally depleted in the...

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Bibliographic Details
Main Authors: Stichel, Torben, Frank, Martin, Rickli, Jörg Dominik, Haley, Brian A
Format: Dataset
Language:English
Published: PANGAEA 2012
Subjects:
Event label
Date/Time of event
Latitude of event
Longitude of event
Elevation of event
DEPTH, water
Temperature, water, potential
Salinity
Neutral density
ε-Neodymium
ε-Neodymium, standard deviation
Neodymium, dissolved
ε-Hafnium
ε-Hafnium, standard deviation
Hafnium, dissolved
Silicate
Comment
Hydrographic station
Calculated
CTD, Sea-Bird SBE 911plus
see references
ANT-XXIV/3
Polarstern
Global marine biogeochemical cycles of trace elements and their isotopes GEOTRACES
Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158
Antarctic
Arctic
Southern Ocean
Weddell
Antarc*
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.773993
https://doi.pangaea.de/10.1594/PANGAEA.773993
Description
Summary:We present the first combined dissolved hafnium (Hf) and neodymium (Nd) concentrations and isotope compositions of deep water masses from the Atlantic sector of the Southern Ocean. Eight full depth profiles were analyzed for Hf and twelve for Nd. Hafnium concentrations are generally depleted in the upper few hundred meters ranging between 0.2 pmol/kg and 0.4 pmol/kg and increase to relatively constant values of around 0.6 pmol/kg in the deeper water column. At the stations north of the Polar Front (PF), Nd concentrations increase linearly from about 10 pmol/kg at depths of ~ 200 m to up to 31 pmol/kg close to the bottom indicating particle scavenging and release. Within the Weddell Gyre (WG), however, Nd concentrations are essentially constant at 25 pmol/kg at depths greater than ~ 1000 m. The distributions of both elements show a positive correlation with dissolved silicon implying a close linkage to diatom biogeochemistry.Hafnium essentially shows invariant isotope compositions with values averaging at ... : Errors are given as external errors. ...

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