EX1127 Readme


Class of Data:  Surface ocean carbon dioxide concentrations

Dataset Identifier:  EX1127

Expocode: 33KF20110804

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:  EX1127/Explorer

Data quality issues:

     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.

     From 09:25 on 7 August till 12:00 on 8 August, the serial connection to the GPS 
     transducer was lost.  The latitude and longitude of these analyses were obtained
     from ship's data files; the data were merged based on time.

Contact person for this dataset:  

     Kevin Sullivan
     (305)361-4382
     Kevin.Sullivan@noaa.gov

Timestamp for dataset reduction:  12/2/2011

Timestamp for most recent update of dataset:  12/2/2011

Matlab version used for reduction: 1.10

Time period the dataset refers to:  8/4/2011 - 8/13/2011

Geographic area the dataset refers to:

   Day 1  - Bayonne, New Jersey (40.7 N / 74.1 W)
   Day 3  - Kings Wharf, Bermuda (32.3 N / 64.8 W)
   Day 5  - Philipsburg, St.Maarten (18 N / 63 W)
   Day 6  - Charlotte Amalie, St.Thomas (18.3 N / 64.9 W)
   Day 7  - San Juan, Puerto Rico (18.5 N / 66.1 W)
   Day 10 - Bayonne, New Jersey (40.7 N / 74.1 W)