Radium isotopes and 228Th in surface water samples collected on POLARSTERN expedition PS78

228Ra is strongly enriched in shelf waters and its half-life (5.8 years) is well suited to study the fate of shelf-derived water in the central Arctic. During PS78 (TRANSARC I) we studied the distribution of 228Ra in surface waters of the central Arctic to investigate how this 228Ra signal is transp...

Full description

Bibliographic Details
Main Authors: Rutgers van der Loeff, Michiel M, Stimac, Ingrid, Charkin, Alexander N, Bauch, Dorothea
Format: Dataset
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 2021
Subjects:
Arctic
Radium
Thorium
TPD
Event label
Station label
DATE/TIME
LATITUDE
LONGITUDE
DEPTH, water
Depth, bathymetric
Radium-224
Radium-224, standard deviation
Radium-226
Radium-226, standard deviation
Radium-228
Radium-228, standard deviation
Salinity
Temperature, water, potential
δ18O, water
Fraction
Ships non-toxic pump
Water pump
RaDeCC
Gamma spectroscopy
ARK-XXVI/3
Polarstern
Online Access:https://dx.doi.org/10.1594/pangaea.935963
https://doi.pangaea.de/10.1594/PANGAEA.935963
Description
Summary:228Ra is strongly enriched in shelf waters and its half-life (5.8 years) is well suited to study the fate of shelf-derived water in the central Arctic. During PS78 (TRANSARC I) we studied the distribution of 228Ra in surface waters of the central Arctic to investigate how this 228Ra signal is transported in the Transpolar Drift. Water from the ships' seawater intake (Sta 196, 205) or from a submersible pump lowered to 10m depth on hydrographic stations (from station 209 onwards) was filtered and passed over MnO2-coated cartridges to absorb Radium and Thorium. Short-lived 224Ra, as analog for the total concentration of its parent 228Th, was determined on board with RaDeCC counting. In the lab, the cartridges were leached and long-lived Radium isotopes were measured by gamma spectroscopy.

Similar Items