Dataset: GPpr09 Dissolved Th and Pa
Deployment: SO245

Depth profiles of seawater dissolved 232Th, 230Th, and 231Pa
Principal Investigator: 
Robert F. Anderson (Lamont-Doherty Earth Observatory, LDEO)
Co-Principal Investigator: 
Martin Q. Fleisher (Lamont-Doherty Earth Observatory, LDEO)
Frank J. Pavia (Lamont-Doherty Earth Observatory, LDEO)
BCO-DMO Data Manager: 
Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)
Deployment Synonyms:
 GPpr09,  UltraPac

This dataset contains depth profiles of seawater dissolved 232Th, 230Th, and 231Pa from R/V Sonne cruise SO245 (UltraPac, GPpr09).

Dataset Notes:
Radionuclide concentrations are given as micro-Becquerel (10-6 Bq, µBq or micro-Bq) per kg seawater for 230Th and 231Pa, and pmol (10-12 mol) per kg seawater for 232Th. A Becquerel is the SI unit for radioactivity and is defined as 1 disintegration per second. These units are recommended by the GEOTRACES community. 

"Dissolved" (D) here refers to that which passed through a 0.45 µm AcropakTM 500 filter capsule sampled from conventional Niskin bottles. 

For dissolved, seawater was weighed directly in the laboratory to determine sample size, taking into account acid added at sea. Concentrations below detection are listed as "bdl". The abbreviation "nd" refers to no data available. 

Parameter names are adopted based on a recommendation from the GEOTRACES community (

This is data measured at Lamont-Doherty Earth Observatory of Columbia University (LDEO).  

More information about this dataset deployment