chlorophyll_a

 PI:              Walker O. Smith
 of:              Virginia Institute of Marine Science
 dataset:         Fluorometric chlorophyll-a
 project/cruise:  AESOPS KIWI09, APFZ Process cruise 2
 ship:            Roger Revelle

 Methodology: Please see Chapter 14 of the JGOFS protocols (1994),
 "Measurement of Chlorophyll a and Phaeopigments by Fluorometric Analysis"

 PI-Notes on Methodology:
               25mm GF/F filters
               Extracted volume = 7mL in 90% Acetone
               1.2M HCl = 3 drops
               Turner Design Analog Field Fluorometer. Blank=0.
                   Calibrated by:  A-M White


 Parameter      Description                       Units

 event         event number from event log
 sta           station number from event log
 cast          cast number from event log
 cast_type     CTD = CTD rosette
               TM = trace metal rosette
 bot           rosette bottle number
 depth_n       nominal sample depth               meters
 chl_a         chlorophyll-a                      micrograms/liter