| Summary: | In March, 2008, the Ocean Carbon Cycle (OCC) group at NOAA's Atlantic Oceanographic and Meteorological Laboratory (AOML) installed an underway system to measure surface pCO2 in the Hydro Chem Lab aboard the Gordon Gunter. In August 2010, the underway system was replaced with a newer version system that could be connected more easily to the ship and other sensors. The installations were greatly facilitated by the cooperation of the ship's officers and crew, especially the operation officers and electronic technicians. While the ship conducts the research that is the focus of a cruise, the pCO2 instrument takes 5 air and 60 water measurements every 3 hours. NCEI Accession 0162290 includes Surface underway, chemical, meteorological and physical data collected from NOAA Ship R/V Gordon Gunter in the North Atlantic Ocean, US North-East coast during 2017. These data include measurements of mole fraction of CO2 in the equilibrator headspace (dry) at equilibrator temperature, mole fraction of CO2 measured in dry outside air, barometric pressure in the equilibrator headspace, barometric pressure, corrected to sea level, water temperature in equilibrator, sea surface temperature, sea surface salinity, fugacity of CO2 in sea water at SST and 100% humidity, and difference between sea water fCO2 and interpolated air fCO2. The instruments used to collect these data include carbon dioxide (CO2) gas analyzer and shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement. These data were collected by Rik Wanninkhof and Denis Pierrot of US DOC; NOAA; OAR; Atlantic Oceanographic and Meteorological Laboratory as part of the R/V Gordon Gunter research coastal cruises GU1701 Transit Leg, GU1701 Leg 1 and 2, GU1702 data set. The cruise Expedition codes (EXPOCODE) are 33GG20170505, 33GG20170516, 33GG20170530, 33GG20170610.
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