Kevin SullivanNOAA/Atlantic Oceanographic & Meteorological Laboratory
4301 Rickenbacker Causeway
305-361-4382Kevin.Sullivan@noaa.govRik WanninkhofNOAA/Atlantic Oceanographic & Meteorological Laboratory
4301 Rickenbacker Causeway, Miami Fl, 33149
305-361-4379Rik.Wanninkhof@noaa.govdatasetIDNOAA Climate Program Office; NOAA Ocean Acidification Program2015083020150830HB1502Research CruiseShipEquilibrator-IR or CRDS or GC33HH20150519EcoMon, AOML_SOOP_CO2North Atlantic-75.5-65.444.235.42015051920150603R/V Henry Bigelow33HHNOAAxCO2_EQU_ppmMole fraction of CO2 in the equilibrator headspace (dry) at equilibrator temperature (ppm)xCO2_ATM_ppmMole fraction of CO2 measured in dry outside air (ppm)xCO2_ATM_interpolated_ppmMole fraction of CO2 in outside air associated with each water analysis. These values are interpolated between the bracketing averaged good xCO2_ATM analyses (ppm)PRES_EQU_hPaBarometric pressure in the equilibrator headspace (hPa)PRES_ATM@SSP_hPaBarometric pressure measured outside, corrected to sea level (hPa)TEMP_EQU_CWater temperature in equilibrator (°C)SST_CSea surface temperature (°C)SAL_permilSea surface salinity on Practical Salinity Scale (o/oo)fCO2_SW@SST_uatmFugacity of CO2 in sea water at SST and 100% humidity (μatm)fCO2_ATM_interpolated_uatmFugacity of CO2 in air corresponding to the interpolated xCO2 at SST and 100% humidity (μatm)dfCO2_uatmSea water fCO2 minus interpolated air fCO2 (μatm)WOCE_QC_FLAGQuality control flag for fCO2 values (2=good, 3=questionable)QC_SUBFLAGQuality control subflag for fCO2 values, provides explanation when QC flag=33 metersBowSpray head above dynamic pool with thermal jacket0.95 L (0.4 L water, 0.55 L headspace)1.5 - 2.0 L/min70 - 150 ml/minYesGas stream passes through a thermoelectric condenser (~5 °C) and then through a Perma Pure (Nafion) dryer before reaching the analyzer (90% dry).Primary equilibrator is vented through a secondary equilibrator.Yes, 5 readings in a group every 3.4 hoursMast above the bridge, ~35 meters above sea surfaceGas stream passes through a thermoelectric condenser (~5 °C) and then through a Perma Pure (Nafion) dryer before reaching the analyzer (90% dry).IRLI-COR6262Every 140 seconds, except during calibration± 0.01 μatm in fCO2_SW± 2 μatm in fCO2_SW± 0.01 μatm in fCO2_ATM± 0.5 μatm in fCO2_ATM
Std 1: JA02645, 204.74 ppm, owned by AOML, used every 3.4 hours.
Std 2: JA02273, 317.49 ppm, owned by AOML, used every 3.4 hours.
Std 3: JB03591, 409.69 ppm, owned by AOML, used every 3.4 hours.
Std 4: JA02647, 518.24 ppm, owned by AOML, used every 3.4 hours.
Std 5: JB03063, 0.00 ppm, owned by AOML, used every ~18 hours. The analyzer is calibrated every 3.4 hours with field standards that in turn were calibrated with primary standards that are directly traceable to the WMO scale. The zero gas is ultra-high purity air.Instrument is located in an air-conditioned laboratory. Ultra-High Purity air (0.0 ppm CO2) and the high standard gas are used to zero and span the LI-COR analyzer.Pierrot, D., C. Neil, K. Sullivan, R. Castle, R. Wanninkhof, H. Lueger, T. Johannessen, A. Olsen, R. A. Feely, and C. E. Cosca (2009), Recommendations for autonomous underway pCO2 measuring systems and data reduction routines, Deep-Sea Res II, 56, 512-522.details of CO2 sensing (not required)xco2(dry)After sea water pump, ~3 m below sea surfaceSeabird, Inc.SBE 38± 0.0010.0003Factory calibrationManufacturer's Resolution is taken as Precision; Maintained by ship.Inserted into equilibrator ~5 cm below water levelHart1523± 0.0150.0003Factory calibrationResolution is taken as Precision.Attached to equilibrator headspace. Differential pressure reading from Setra 239 attached to the equilibrator headspace is added to the pressure reading from the LICOR, which is measured by an external Setra 270 connected to the exit of the analyzer.Setra270± 0.150.015Factory calibrationManufacturer's Resolution is taken as Precision.yesOn mast above the bridge at ~35 m above sea surface waterVaisalaPTB220± 0.15 hPa 0.01 hPaFactory calibrationManufacturer's Resolution is taken as Precision; Maintained by ship.In dry lab after a debubbler, next to CO2 systemSeabirdSBE 45± 0.005 o/oo0.0002 o/ooFactory calibrationManufacturer's Resolution is taken as Precision; Maintained by ship.The analytical system performed well throughout this cruise. Because of the instability of the barometric pressure sensor, the outside atmospheric pressure at sea surface was estimated by subtracting 1.29 mbar from the LICOR pressure. NAhttp://www.aoml.noaa.gov/ocd/ocdweb/bigelow/bigelow_introduction.html All AOML fCO2 underway data from the R/V Henry B. Bigelow are posted on this site.underway