HB1203 ReadMe

Class of Data:  Surface ocean carbon dioxide concentrations

Dataset Identifier:  HB1203 Cetacean Biology

Expocode: 33HH20120618

Statement of how to cite dataset:

     Bigelow website: http://www.aoml.noaa.gov/ocd/gcc/rvbigelow_introduction.php
     For more information on dataset citation please see Master Readme File.

Measurement platform identifier:  NOAA Ship Henry B. Bigelow, R225

Time period the dataset refers to:  18 July, 2012 - 28 July, 2012

Geographic area the dataset refers to:

      Latitude,  40.3 to 43.0 degree north
      Longitude,  64.9 to 71.5 degree west

Standard and Reference Gases:  
     The four CO2 standard cylinders come from Scott-Marrin, Inc., and are 
     calibrated with primary standards that are directly traceable to the 
     WMO scale.  The zero gas is ultra-high purity air.  Any value outside
     the range of the standards should be considered approximate (+/-5 ppm).
     While individual data points above 520 or below 200 may less accurate,
     the general trends would be indicative of the seawater chemistry.  
     The standards used on the cruise are:

      STANDARD        TANK #        [CO2]ppm       VENDOR
         STD1         JA02645        204.74      Scott-Marrin
         STD2         JA02273        317.49      Scott-Marrin
         STD3         JA02285        372.23      Scott-Marrin
         STD4         JA02647        518.24      Scott-Marrin
         STD5         JA03093          0.00      Scott-Marrin

Data quality issues:

     On 21 July, the water flow increased from 1.6 to 3.6 L/min for less than 
     10 minutes and then decreased to 1.3 L/min for 30 minutes.  During that 
     30 minute period, the concentration of CO2 increased to the highest value 
     during the cruise; however, no evidence that these values are an artifact 
     could be found in other instrumental parameters.  There are other increases
     in CO2 concentration of short duration, but none as great.

Timestamp for dataset reduction:  14 Sept, 2012

Timestamp for most recent update of dataset:  14 Sept, 2012

Matlab version used for reduction: 1.10

Contact person for this dataset:  

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