phaeopigments

 PI:              Walker O. Smith
 of:              Virginia Institute of Marine Science (VIMS)
 dataset:         Fluorometric chlorophyll-a & phaeopigments
 project/cruise:  AESOPS/NBP97-8 - Ross Sea Process 4 Cruise
 ship:            Nathaniel B. Palmer

 Methodology: Please see Chapter 14 of the JGOFS protocols (1994),
 "Measurements 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
              ASA's 10-AU fluorometer. Blank=0. 
		Calibrated by S. Mathot and J. Seward
              (ASA: Antarctic Support Associates)

DMO Note on multiple-bottle events
DMO Note on discrepencies with TMbottle data
 
 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           bottle number
 depth_n       nominal depth                                  meters
 Fo_to_Fa      ratio of fluorometer readings, where:
                  Fo = sample reading before acidification
                  Fa = sample reading after acidification
 chl_a_fluor   chlorophyll-a, fluorometric method             micrograms/liter
 phaeo         phaeopigments, fluorometric method             micrograms/liter