ammonium

 
 PI:             James McCarthy
 dataset:        Ammonium Concentrations
 project/cruise: EQPAC/TT011
 ship:           Thomas Thompson

PI-Notes
 Samples were obtained with the *trace metal-clean* rosette and   
 assayed by the method of Brzezinski (1988) Limnol. & Oceanog. 33:
 1176-1182. Detection limit = 0.002 micro molar.          

 Parameter   Description                                   Units

 sta         station number from event log
 cast        cast number of Trace Metal Free (TM) casts
 event       event number, a unique assigned to each 
             sampling operation, a concatenation of date 
	     and time (MMDDHHmm)
 depth       sample depth - wire out                       meters
 nh4         ammonium concentration                        micro molar