HB1202 ReadMe Class of Data: Surface ocean carbon dioxide concentrations Dataset Identifier: HB1202 EcoMon Expocode: 33HH20120531 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: 31 May, 2012 - 16 June, 2012 Geographic area the dataset refers to: Latitude, 36.0 to 42.2 degree north Longitude, 65.4 to 75.6 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: The analytical system operated well throughout this cruise. 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