EX0942 Readme


Class of Data:  Surface ocean carbon dioxide concentrations

Dataset Identifier:  EX0942

Expocode: 33KF20091129

Statement of how to cite dataset:

     For information on dataset citation and more, please see Master Readme File.
     Explorer website: http://www.aoml.noaa.gov/ocd/gcc/explorer_introduction.php

Measurement platform identifier:  EX0942/Explorer

Data quality issues:
     An automatic valve on the manifold controlling sea water going towards the TSG
     failed towards the end of the previous cruise.  The rider on this cruise manually 
     opened this automatic valve to allow the software to start the sea water pump.

     Standard Gases and Reference Gas:  The three standard gases come from CMDL
     in Boulder and are directly traceable to the WMO scale.  The reference gas
     is a non-calibrated gas from a commercial company.  Any value outside the
     range of the standards should be considered approximate (5 ppm).
     While individual data points above 460 or below 300 may
     not be accurate, the general trends should be indicative of the seawater
     chemistry.  The standards used on the cruise are:

           STANDARD          TANK #       CONCENTRATION       VENDOR
           STD1                                 0.00         Commercial
           STD2              CA07952          459.89           CMDL
           STD3              CA02040          319.82           CMDL                                               
           STD4              CA02030          377.14           CMDL                                               

     Units:  All xCO2 values are reported in parts per million (ppm) and fCO2
     values are reported in microatmospheres (uatm) assuming 100% humidity at the
     equilibrator temperature.


Contact person for this dataset:  

     Kevin Sullivan
     (305)361-4441
     Kevin.Sullivan@noaa.gov

Timestamp for dataset reduction:  8/10/2010

Timestamp for most recent update of dataset:  8/10/2010

Matlab version used for reduction: 1.05

Time period the dataset refers to:  11/29/2009 - 12/11/2009

Geographic area the dataset refers to:

   Day 1  - Bayonne, New Jersey (40.7 N / 74.1 W)
   Day 4  - San Juan, Puerto Rico (18.5 N / 66.1 W)
   Day 5  - Charlotte Amalie, St.Thomas (18.3 N / 64.9 W)
   Day 6  - Philipsburg, St.Maarten (18 N / 63 W)
   Day 7  - Roseau, Dominica (15.3 N / 61.4 W)
   Day 8  - Bridgetown, Barbados (13.1 N / 59.6 W)
   Day 9  - St.Johns, Antigua (17.1 N / 61.8 W)
   Day 13 - Bayonne, New Jersey (40.7 N / 74.1 W)