ammonium

 PI:              James J. McCarthy
 of:              Harvard University
 dataset:         High Sensitivity Euphotic Zone Ammonium Data
 project/cruise:  Arabian Sea/TTN-043 - Process Cruise 1   
 ship:            Thomas Thompson
 
 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 micromoles/liter


 Parameter    Description                                 Units

 event        event number, from event log
 sta          station number, from event log
 sta_std      Arabian Sea standard station identifier
 cast         cast number, from event log, 
                  consecutive within station
 TM_num       Trace metal clean rosette cast number
 bot          TM bottle number
 depth        sample depth (corrected wire out)           meters
 NH4          ammonium concentration                      micromoles/liter
 
 nd indicates missing or bad data