EX1042 Readme


Class of Data:  Surface ocean carbon dioxide concentrations

Dataset Identifier:  EX1042

Expocode: 33KF20101210

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:  EX1042/Explorer

Data quality issues:

     The measured air values close to land were likely impacted by land sources.
     So, those values were not used but included and flagged as 'questionable'.

     STD1 analyses were not used in the calibration due to lack of data points.

     Standard Gases and Reference Gas:  The three standard gases come from CMDL
     in Boulder and are directly traceable to the WMO scale.  The zero 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 550 or below 300 may less 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          549.89           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)361-4382
     Kevin.Sullivan@noaa.gov

Timestamp for dataset reduction:  7/28/11

Timestamp for most recent update of dataset:  7/28/11

Matlab version used for reduction: 1.09

Time period the dataset refers to:  12/10/2010 - 12/19/2010

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  - Samana, Dominican Republic (19.2 N / 69.3 W)
   Day 7  - Labadee, Haiti (19.8 N / 72.2 W)
   Day 10 - Bayonne, New Jersey (40.7 N / 74.1 W)