ctd

  PI:              William Broenkow
  of:              Moss Landing Marine Laboratory (MLML)
  dataset:         CTD data with beam attenuation and fluorescence
  project/cruise:  North Atlantic Bloom Experiment/cruise 198  6/28/89-7/7/89 
  ship:            R/V Endeavor
   
  Methodology
  CTD and analytical procedures (Broenkow)   
  
  DMO note on calculated depth


  Parameters    Descriptions                              Units

  sta           station number from event log             dimensionless
  cast          cast number, numbered consecutively       dimensionless
                  within station
  event         event number, from event log, a unique    dimensionless
                  number assigned to each sampling 
                  operation 
  lat           latitude, negative = south                decimal degrees
  lon           longitude, negative = west                decimal degrees
  depth         depth calculated from pressure            meters
  press         depth of sample reported as pressure      decibars
  temp          temperature IPTS-68                       degrees C
  sal           salinity as calculated from conductivity  dimensionless        
                  PSS-78 scale
  O2            oxygen, from CTD sensor                   milliliters/liter
  potemp        potental temperature, calculated by U.S.  degrees C
                  JGOFS DMO
  sigma_0       sigma theta, calculated by U.S. JGOFS     dimensionless       
                  DMO  
  beam_cp       beam attenuation coefficient, due to      1/meter
                  particles
  fluor_re      rescaled fluorescence (numerically        micrograms chl-a/liter
                  equivalent to chlorophyll-a 
                  concentrations)