tco2_man

 PI:             Paul Quay and Jianrong Zhang
 dataset:        Dissolved Inorganic Carbon, delta13C and delta18O
 project/cruise: EQPAC/TT007
 ship:           Thomas Thompson

 The methodology is described in the following literature:

 1. Kroopnick P. M. (1974) The dissolved O2-CO2-13C system in the
 eastern equatorial Pacific. Deep-Sea Research, 21, 211-227.
 2. Quay P. D., B. Tilbrook and C. S. Wong (1992) Oceanic uptake of
 fossil fuel CO2:Carbon-13 Evidence, Science, 256, 74-79.

 EqPac bottle quality review summary from DMO
 
 DMO cautionary note:
 The DMO suspects a misalignment of either bottle number or the
 corresponding depth/pressure for event number 03010354.  Possible solutions 
 are: bottle 19 at 54 meters or bottle 18 at 64 meters.
 

 Parameter   Description                                   Units

 event       event number from cruise logs                 MMDDhhmm
 sta         station number
 lat_n       nominal latitude of station, (- south         whole degrees
                indicator)
 lon_n       nominal longitude of station, (- west         whole degrees
                indicator)
 cast        CTD rosette cast number
 bot         rosette bottle number
 press       sample depth reported as pressure             decibars
 TCO2_man    total carbon dioxide in seawater,             micromoles C/kilogram
                manometric method
 delta13C    ratio carbon 12 to carbon 13 corrected 
                to PDB standard
 delta18O    ratio oxygen 16 to oxygen 18 corrected 
                to PDB standard, delta 18O are for the 
	        oxygen in CO2 converted from DIC. 
 q_flag      quality flag, applies to all samples
                2 means ok
                3 indicates a questionable sample