pCO2_surface

 PI:              Taro Takahashi 
 of:              Lamont Doherty Earth Observatory 
 dataset:         pCO2 from shipboard continuous surface system
 project/cruise:  AESOPS/All cruises with other related cruises
 ship:            Nathaniel B. Palmer and Roger Revelle

 Methodology/References
 Same document in WORD format

 Notes:  1. NBP94-6, NBP96-6 and NBP97-9 were not JGOFS cruises but are 
            included here by the P.I. as relevant data.

         2. All cruises have been processed by averaging the data to
            approximately 3.5 minute intervals.

         3. Data from JGOFS Southern Ocean Process 1 (NBP96-4A) is not
            available.  The shipboard pCO2 system was not properly
            started and no data were recorded.

 Parameter       Description                                     Units

 cruise_id       cruise designation
 cruise_alias    commonly used cruise name
 date_begin      date sampling started (YYYYMMDD) 
 lat             latitude, negative=south                        decimal degrees
 lon             longitude, negative=west                        decimal degrees
 year            4 digit year
 yrday           day of year, including time of the day          decimal days
                   0000 01 Jan =   1.00000
                   2359 31 Dec = 365.99931
                   time zone is UTC (GMT)
 temp            sea surface temperature                         degrees Celsius
 sal             sea surface salinity                            PSU
 press_bar       pressure of equilibration                       millibars
 pCO2_temp       temperature at which pCO2 was measured          degrees Celsius
 vco2_sw         mole volume of CO2 in dry air                   parts per million
 pco2_meas       measured partial pressure of CO2 in seawater    microatmospheres
 pco2_theta      partial pressure of CO2 in seawater             microatmospheres
                   corrected to the sea surface temperature
                   using 4.23 percent per degree Celsius
 nd              no/bad data