zoomass

  PI:              Hans Dam
  of:              University of Connecticut
  dataset:         Mesozooplankton biomass
  project/cruise:  North Atlantic Bloom Experiment / 119 legs 4, 5
  ship:            R/V Atlantis II

  Methodology
  See:  Dam, Hans G., Carolyn Miller and Sigrun Jonasdottir, 1993.  The trophic role of
  mesozooplankton at 47N and 20W during the North Atlantic Bloom Experiment.  Deep-Sea
  Research II, Vol. 40, N0. 12 pp 197-212.

  DMO Note:
  The reporting of plankton tow events was inconsistent, event numbers
  may reference a single tow or a series of tows.  Use caution in a 
  merging of data from different sources.


  Parameter  Description                                    Units

  year       year (as YYYY)                                 dimensionless
  event      event number, from event log                   dimensionless
  sta        station number from event log                  dimensionless
  cast       cast/operation number, numbered consecutively  dimensionless
               within station
  depth_tow  depth of plankton tow                          meters
  aliquot    aliquot value, the reciprocal (1/value) of     1/value
               the fraction of the samle volume employed
               for the CHN measurement
  vol_filt   volume of water filtered by the net            cubic meters
  sizefrac   size fraction/interval of organisms analyzed   millimeters 
  C          carbon content                                 micrograms
  N          nitrogen content                               micrograms
  C_mass     carbon biomass                                 milligrams C/cubic meter
               biomass values are the means of two 
               pseudoreplicates (subsamples from one tow)
  N_mass     nitrogen biomass                               milligrams N/cubic meter 
  C_to_N     carbon/nitrogen ratio