Sullivan, Kevin NOAA/AOML

4301 Rickenbacker Causeway, Miami, Fl 33149

(305) 361-4382 kevin.sullivan@noaa.gov Wanninkhof, Rik NOAA/Atlantic Oceanographic & Meteorological Laboratory

4301 Rickenbacker Causeway, Miami Fl, 33149

305-361-4379 Rik.Wanninkhof@noaa.gov Pierrot, Denis NOAA/Atlantic Oceanographic & Meteorological Laboratory

4301 Rickenbacker Causeway, Miami Fl, 33149

305-361-4441 Denis.Pierrot@noaa.gov NOAA Climate Program Office; NOAA Ocean Acidification Program 2020302 2020302 EQNX_20200215 SOOP Line Ship Equilibrator-IR or CRDS or GC MLCE20200215 AOML_SOOP_CO2 -80.1 -64.4 26.2 17.9 20200215 20200222 Fort Lauderdale, FL San Juan, Puerto Rico Charlotte Amalie, St. Thomas Punta Cana, Dominican Republic Nassau, Bahamas M/V Equinox MLCE Royal Caribbean International xCO2_EQU_ppm Mole fraction of CO2 in the equilibrator headspace (dry) at equilibrator temperature (ppm) ppm xCO2_ATM_ppm Mole fraction of CO2 measured in dry outside air (ppm) ppm xCO2_ATM_interpolated_ppm Mole fraction of CO2 in outside air associated with each water analysis. These values are interpolated between the bracketing averaged good xCO2_ATM analyses (ppm) ppm PRES_EQU_hPa Barometric pressure in the equilibrator headspace (hPa) hPa PRES_ATM@SSP_hPa Barometric pressure measured outside, corrected to sea level (hPa) hPa TEMP_EQU_C Water temperature in equilibrator (°C) Degree C SST_C Sea surface temperature (°C) Degree C SAL_permil Sea surface salinity on Practical Salinity Scale (o/oo) ppt fCO2_SW@SST_uatm Fugacity of CO2 in sea water at SST and 100% humidity (μatm) μatm fCO2_ATM_interpolated_uatm Fugacity of CO2 in air corresponding to the interpolated xCO2 at SST and 100% humidity (μatm) μatm dfCO2_uatm Sea water fCO2 minus interpolated air fCO2 (μatm) μatm WOCE_QC_FLAG Quality control flag for fCO2 values (2=good, 3=questionable) None QC_SUBFLAG Quality control subflag for fCO2 values, provides explanation when QC flag=3 None 5 meters Bow Spray head above dynamic pool, with thermal jacket 0.95 L (0.4 L water, 0.55 L headspace) 1.5 - 2.0 L/min 70 - 150 ml/min Yes Gas 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 5 hours. At forward-most, grated opening in the starboard hull on the mooring deck, which is 12 meters above sea level. Gas stream passes through a thermoelectric condenser (~5 °C) and then through a Perma Pure (Nafion) dryer before reaching the analyzer (90% dry). IR LI-COR 6262 Every 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: CA05585, 280.18 ppm, owned by ESRL, used every ~5.0 hours. Std 2: CA05979, 381.89 ppm, owned by AOML, used every ~5.0 hours. Std 3: CA05998, 419.32 ppm, owned by AOML, used every ~5.0 hours. Std 4: CB08988, 455.60 ppm, owned by ESRL, used every ~5.0 hours. Std 5: LL100000, 0.00 ppm, owned by AOML, used every ~25.0 hours. 4 The analyzer is calibrated every 5 hours with field standards that in turn were calibrated with primary standards that are directly traceable to the WMO X2007 scale. The zero gas is ultra-high purity air. The instrument is located in the Bow Thruster Room at the bow of the ship. The space is not air-conditioned but the temperature is somewhat controlled by air vents. 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) In Bow Thruster room, about 1m after the intake which is directly through the ship's hull, before the SW pump. Seabird, Inc. SBE 38 0.001 0.0003 Factory calibration Manufacturer's Resolution is taken as Precision; Maintained by University of Miami's MTG group. Inserted into equilibrator ~5 cm below water level Hart 1523 0.015 0.001 Factory calibration Resolution is taken as Precision. Attached to equilibrator headspace. The differential pressure reading from Setra 239, which is attached to the equilibrator headspace, is added to the pressure reading from the LICOR analyzer, which is measured by an external Setra 270 connected to the exit of the analyzer. Setra 270 0.15 0.015 Factory calibration Manufacturer's Resolution is taken as Precision. At the base of the radar mast, 48 meter above sea level. RM Young 61202V ± 0.3 hPa 0.1 hPa Factory Calibration no Manufacturer's Resolution is taken as Precision; Maintained by University of Miami's MTG group. Next to the pCO2 System. Seabird SBE 45 ± 0.005 o/oo 0.0002 o/oo Factory calibration Manufacturer's Resolution is taken as Precision; Maintained by University of Miami's MTG group. The analytical system operated fine during this cruise. The EQU gas flow was more variable that normal occasionally, which reduced data coverage. Original Data Location: http://www.aoml.noaa.gov/ocd/ocdweb/equinox/equinox_introduction.html. Full unprocessed data files from analytical instrument including flow information plus meteorological and TSG data at time of sampling can be obtained upon request. NA underway