The underway surface and atmospheric CO2 levels were measured in the west Arctic Ocean during the 5th Chinese National Arctic Research Expedition (CHINARE2012) from 2012-07-17 to 2012-09-12. The system was monitored and calibrated with three certified gas standards and a zero gas every 3 hours. The dataset was reduced by the MatLab program pCO2 Sys v126, following the procedure in Pierrot et al. (2009). This dataset includes measurements of fugacity of CO2 (fCO2) in sea water at sea water temperature, fugacity of CO2 (fCO2) in atmosphere, sea surface temperature, sea surface salinity, atmospheric pressure, and delta fCO2 between sea water and atmosphere (fCO2w - fCO2a).

The underway surface and atmospheric CO2 levels were measured in the west Arctic Ocean during the 6th Chinese National Arctic Research Expedition (CHINARE2014) from 2014-07-27 to 2014-09-09. The system was monitored and calibrated with three certified gas standards and a zero gas every 3 hours. The dataset was reduced by the MatLab program pCO2 Sys v126, following the procedure in Pierrot et al. (2009). This dataset includes measurements of fugacity of CO2 (fCO2) in sea water at sea water temperature, fugacity of CO2 (fCO2) in atmosphere, sea surface temperature, sea surface salinity, atmospheric pressure, and delta fCO2 between sea water and atmosphere (fCO2w - fCO2a).

This dataset includes surface underway data collected from R/V Sikuliaq in the North Pacific Ocean, Gulf of Alaska, Bering Sea, Chukchi Sea and Arctic Ocean from 2016-12-31 to 2017-11-07. These data include barometric pressure, partial pressure (or fugacity) of carbon dioxide - water, salinity and sea surface temperature. 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 Stewart C. Sutherland and Taro Takahashi of Lamont-Doherty Earth Observatory (LDEO) and Colm Sweeney of NOAA Earth System Research Laboratory (ESRL) as part of the SOOP_R/V_Sikuliaq_2017 dataset.

This dataset includes surface underway, chemical, meteorological and physical data collected during R/V Simon Stevin coastal cruises in the North Sea from 2018-04-06 to 2018-12-18. These data include partial pressure (or fugacity) of carbon dioxide (pCO2) - atmosphere, pCO2 - water, sea surface salinity, sea surface temperature and barometric pressure. The instruments used to collect these data include barometric pressure sensor and carbon dioxide (CO2) gas analyzer.

This NCEI Accession includes surface underway, chemical, meteorological and physical data collected during the R/V Celtic Explorer research cruises in the North Atlantic Ocean from 2022-04-24 to 2022-07-24. The measurements are done with a pCO2 instrument from General Oceanics (Miami/USA) and is described in detail in Pierrot et al.(2009). Surface water is pumped continuously from the intake to the equilibrator. The equilibrator contains a water spray head, and as the water flows through it the dissolved CO2 equilibrates with the headspace. The headspace is dried and xCO2 is determined and as the water flows through it the dissolved CO2 equilibrates with the headspace. The headspace is dried and xCO2 is determined by an infrared sensor. Calculations were performed following Pierrot (2009) and are described in detail in Steinhoff (2010).

This dataset includes surface underway, chemical, meteorological and physical data collected during R/V James Clark Ross cruises in the South Atlantic Ocean, Southern Ocean, Greenland Sea and Norwegian Sea from 2019-01-07 to 2019-12-20. These data include partial pressure (or fugacity) of carbon dioxide - atmosphere, partial pressure (or fugacity) of carbon dioxide - water, sea surface salinity and sea surface temperature and barometric pressure. The instruments used to collect these data include barometric pressure sensor and carbon dioxide (CO2) gas analyzer.

This dataset includes Surface underway, chemical, meteorological and physical data collected from R/V Xue Long Arctic CHINARE2010 Expedition in the North Pacific Ocean, Bering Sea and Arctic Ocean from 2010-07-09 to 2010-09-06. These data include measurements of Mole fraction of CO2 in the equilibrator headspace (dry) at equilibrator temperature, in parts per million, 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.

This dataset includes surface underway measurements of partial pressure of carbon dioxide (pCO2), water temperature and sea surface salinity collected during the Beaufort Gyre Observing System/Joint Ocean Ice Study onboard the CCGS Louis S. St-Laurent during the Beaufort Gyre Observing System/Joint Ocean Ice Study cruise in the Arctic Ocean and Beaufort Sea from 2018-09-08 to 2018-10-01. The Shipboard Underway pCO2 Environmental Recorder (Sunburst Sensors, SUPER-CO2) utilizes a LICOR NDIR (non-dispersive infrared) analyzer coupled to a membrane contactor to equilibrate a gas stream to a flowing seawater sample stream. The membrane equilibrator was tied into the ship’s seawater line at a set flow rate of ~1.5 liters per minute. The SUPER-CO2 uses a Windows based tablet running custom software, developed by Sunburst Sensors, for instrument control, real-time data display and data collection. Three calibration standards (zero CO2, 386 and 710 parts per million CO2) were ran 6 times per day for the duration of the cruise. The raw collected SUPER-CO2 data was processed using a custom written Matlab QC program. The Matlab program calibrates the SUPER-CO2 values to the CO2 standards as well as temperature correcting the SUPER-CO2 to the seawater surface temperature (Dickson, 2007)