th234activity

  PI:         Ken Buesseler
  ob:         Woods Hole Oceanographic Institution
  dataset:    Thorium 234 activity in particulate and dissolved phases
  project:    North Atlantic Bloom Experiment / 119, legs 4 and 5
  ship:       R/V Atlantis II
   
  Methodology
  Sampling and analytical procedures (Buesseler)


  Parameter          Description                                 Units

  year               year reported as YYYY
  sta                station number from event log               dimensionless   
  cast               cast number, numbered consectively within   dimensionless
                       station, from event log
  event              event number from event log                 dimensionless
  depth              sample depth                                meters
  Th234_d_lt0.5      thorium 234 activity in dissolved phase,    Dpm/l
                       less then 0.5 microns
  Th234_d_lt0.5_err  estimated error, thorium 234 activity in    Dpm/l 
                       dissolved phase, one sigma                  
  Q_code             originator assigned quality code
                     Highest confidence level = a (ie. lowest
                       error)
                     Poorest confidence level = c
                     This quality code is determined by a
                       combination of sampling and analytical
                       factors, and is included in the reported  
                       error estimate.
  Th234_p_gt0.5      thorium 234 activity in particulate phase,  Dpm/l
                       greater then 0.5 microns       
  Th234_p_gt0.5_err  estimated error, thorium 234 activity in    Dpm/l
                       particulate phase, one sigma                  
  Q_code             same as above
  
  Dpm/l = disintegrations per minute per liter