TMbottle

 PI:              Louis Codispoti
 of:              Old Dominion University
 dataset:         Temp, salinity, nutrients from Trace Metal casts
 project/cruise:  AESOPS/NBP-97-3 - Ross Sea Process Cruise 3
 ship:            Nathaniel B. Palmer

 Sampling Methodology
 DMO note on calculated depth

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

 Parameter     Description                                  Units

 event         event number from event log
 sta           station number from event log
 cast          TM cast number from event log
 date          date (YYYYMMDD) decoded as follows
                  YYYY = year, MM = month,
                  DD = day. Date converted to GMT.
 time_begin    starting time of cast in UTC                 decimal hours
 time_end      ending time of cast in UTC                   decimal hours
 lat_begin     starting latitude of cast, negative = south  decimal degrees
 lon_begin     starting longitude of cast, negative = west  decimal degrees
 lat_end       ending latitude of cast                      decimal degrees
 lon_end       ending longitude of cast                     decimal degrees
 bot           TM rosette bottle sequence number
 press         depth of sample reported as pressure         decibars
 depth         depth calculated from pressure               meters
 temp          temperature from CTD probe when              degrees C
                    sampling bottle tripped
 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/liter
 nd            no data or bad data