EX0534E Readme Class of Data: Surface ocean carbon dioxide concentrations Dataset Identifer: EX0534E Statement of how to cite dataset: Explorer website: http://www.aoml.noaa.gov/ocd/gcc/explorer_cruisetracks.php For more information on dataset citation please see Master Readme File. Measurement platform identifier: EX0534E/Explorer Data quality issues: Due to the slow response time of the system, removed the first 11 to 20 minutes of data for each hour for the entire cruise. Converted the wind speed data (both true and relative) to meters per second. An oxygen field and a cruise identifier field have been added to the datafile. Replaced all unchanging data to -9 in the Pres_sealevel_hPa field. 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 (300 ppm, 360 ppm, and 420 ppm) should be considered approximate (5 ppm). While individual data points above 420 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 CA4563 192.34 CMDL STD2 CA3253 426.96 CMDL STD3 CC3758 514.24 CMDL Reference Gas 500 Commercial 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. The first hour of data after leaving port is removed. Project Information: RSMAS Explorer website: http://www.rsmas.miami.edu/rccl/obs/ex-rt-obs.pl Contact person for this dataset: Betty Huss (305)361-4395 Betty.Huss@noaa.gov Timestamp for dataset reduction: 10/05/05 Timestamp for most recent update of dataset: 6/16/07 Time period the dataset refers to: 8/21/2005 - 8/28/2005 Geographic area the dataset refers to: Day 1 - Miami, Florida (25.8 N/80.7 W) Day 3 - San Juan, Puerto Rico (18.5 N/66.1 W) Day 4 - Philipsburg, St. Maarten (18.0 N/63.0 W) Day 5 - Charlotte Amalie, St. Thomas (18.3 N/64.9 W) Day 7 - Nassau, Bahamas (25.1 N/77.3 W) Day 8 - Miami, Florida (25.8 N/80.7 W)