bottle

 PI:              Louis Codispoti
 of:              Old Dominion University
 dataset:         Temp, salinity, nutrients from Niskin bottles
 project/cruise:  AESOPS/NBP-96-5 - Mooring and Trap Deployment
 ship:            Nathaniel B. Palmer

 Sampling Methodology
 DMO note on calculated depth

 PI-Note:   SOME FROZEN NUTRIENT SAMPLES WERE COLLECTED ON THIS LEG,
            AND SUBSEQUENTLY ANALYZED DURING PALMER LEG 97-01.  THESE
            SAMPLES APPEARED TO SUFFER FROM VARIOUS STORAGE AND LABELING
            PROBLEMS, SO THEY ARE NOT INCLUDED IN THIS REPORT.

 AESOPS Investigators, Please note:
  Begin and end parameters for time, latitude and longitude are
  provided in the core CTD and Bottle data.  Investigators
  submitting data related to CTD/Bottle casts are urged to use
  the single lat/lon entry from the Chief Scientist's event log.


 Parameter     Description                                   Units

 event         a unique number assigned to each sampling
                 operation consisting of month MM, day DD
                 hour HH and minute mm
 sta           station number
 cast          CTD cast number
 date          date (YYYYMMDD) decoded as follows
                 YYYY = year, MM = month, DD = day
                 Date converted to UTC(GMT).
 time_begin    start time of cast in UTC(GMT)                decimal hours
 time_end      end time of cast in UTC(GMT)                  decimal hours
 lat_begin     start latitude of cast (negative = South)     decimal degrees
 lon_begin     start longitude of cast (negative = West)     decimal degrees
 lat_end       end latitude of cast                          decimal degrees
 lon_end       end longitude of cast                         decimal degrees
 bot           CTD rosette bottle number
 press         sample depth reported as pressure             decibars
 depth         depth calculated from pressure                meters
 temp          temperature, taken from CTD, IPTS-68          degrees C
 sal_ctd       CTD salinity (PSS-78) when bottle tripped     dimensionless
 sal_bot       bottle salinity (Autosal; PSU)                dimensionless
 O2_ml_L       oxygen (Winkler)                              milliliters/liter
 O2_umol_kg    oxygen (Winkler)                              micromoles/kilogram
 O2_umol_L     oxygen (Winkler)                              micromoles/liter
 NO3           nitrate                                       micromoles/liter
 PO4           phosphate                                     micromoles/liter
 SiO4          silicate                                      micromoles/liter
 NO2           nitrite                                       micromoles/liter
 NH4           ammonium                                      micromoles N/liter

 nd indicates no/bad data