Comments:
 Data collected via in-situ pumping and gamma counting techniques
 referenced in:
 Livingston, H.D. and J.K. Cochran (1987) Determination of transuranic and
 thorium isotopes in ocean water in solution and in filterable particles.
 J. Radioanal. Nucl. Chem., vol. 115 (2), 299-308.

 Buesseler, K.O., M.P. Bacon, J.K. Cochran and H.D. Livingston (1990)
 Shipboard measurement of Th-234 during the JGOFS Spring Bloom Experiment.
 EOS, vol. 71 (2), 139.

 All data decay corrected to mid-point of sampling time
 Contacts: Ken O. Buesseler, Michael P. Bacon, Hugh D. Livingston (WHOI)
 and J. Kirk Cochran (SUNY)

 Data:
 Thorium-234 activities reported as Dpm/l (disintegration per minute per liter)
 Data for dissolved and particulate (0.5 micron nominal pore size) 234-Th
 reported with a one sigma error.  This error is propagated from errors
 due to counting statistics, standardization and in-situ pump collection
 efficiency.
 A data quality code is assigned to each measurement.
    a = Highest confidence level (ie. lowest error);
    c = Poorest confidence level 
    This quality code is determined by a combination of sampling
    and analytical factors, and is included in the reported error
    estimate.