N15_uptake

 PI:              Raymond Sambrotto
 of:              Lamont Doherty Earth Observatory
 dataset:         N-15 uptake rates for nitrate, ammonium and urea,
                               particulate N and particulate C
 project/cruise:  AESOPS/KIWI07 - APFZ Process Cruise 1
 ship:            Roger R. Revelle

 Sampling Methodology


 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 from event log
 depth_n        nominal depth
 dfaa           dissolved free amino acid concentration    micromoles/liter
 Urea           urea concentration (as nitrogen)           micromoles N/liter
 POC            particulate organic carbon concentration   micromoles/liter
 PON            particulate nitrogen concentration         micromoles/liter
 pNO3           nitrate uptake rate                        micromoles/liter/day
 pNH4           dilution corrected ammonium uptake rate    micromoles/liter/day
 pUrea          urea uptake rate                           micromoles/liter/day