Partial pressure (or fugacity) of carbon dioxide, temperature, salinity and other variables collected from surface underway observations using carbon dioxide gas analyzer, shower head equilibrator and other instruments from SOOP M/V Equinox in the Caribbean Sea, Gulf of Mexico and North Atlantic Ocean in 2017 (NCEI Accession 0161868)
PACKAGE DESCRIPTION: This dataset consists of the surface underway measurements of Mole fraction of CO2 in the equilibrator headspace (dry) at equilibrator temperature (ppm), Mole fraction of CO2 measured in dry outside air (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), Barometric pressure in the equilibrator headspace (hPa), Barometric pressure measured outside, corrected to sea level (hPa), Water temperature in equilibrator (°C), Sea surface temperature (°C), Sea surface salinity, Fugacity of CO2 in sea water at SST and 100% humidity (μatm), Fugacity of CO2 in air corresponding to the interpolated xCO2 at SST and 100% humidity (μatm), Sea water fCO2 minus interpolated air fCO2 (μatm). The measurement were performed during the SOOP M/V Equinox in the Caribbean Sea Gulf of Mexico and North Atlantic Ocean from 2017-01-02 to 2018-01-06.
CITE AS: Wanninkhof, Rik; Sullivan, Kevin F.; Pierrot, Denis (2017). Partial pressure (or fugacity) of carbon dioxide, temperature, salinity and other variables collected from surface underway observations using carbon dioxide gas analyzer, shower head equilibrator and other instruments from SOOP M/V Equinox in the Caribbean Sea, Gulf of Mexico and North Atlantic Ocean in 2017 (NCEI Accession 0161868). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.7289/v5p84943. Accessed [date].
Surface underway;
TEMPORAL COVERAGE:
SPATIAL COVERAGE:
GEOGRAPHIC NAMES:
PLATFORMS:
RESEARCH PROJECT(S):
VARIABLES / PARAMETERS:
pCO2 (fCO2) autonomous | |
---|---|
Abbreviation: | fCO2_SW@SST |
Unit: | uatm |
Observation type: | Surface underway |
Measured or calculated: | Measured |
Sampling instrument: | Seawater pump |
Location of seawater intake: | Bow |
Analyzing instrument: | Infrared Analyzer: LI-COR model 6262 |
Detailed sampling and analyzing information: | Pierrot, D., Neill, C., Sullivan, K., Castle, R., Wanninkhof, R., Lüger, H., Johannessen, T., Olsen, A., Feely, R. A., & Cosca, C. E. (2009). Recommendations for autonomous underway pCO2 measuring systems and data-reduction routines. Deep Sea Research Part II: Topical Studies in Oceanography, 56(8-10), 512-522. https://doi.org/10.1016/j.dsr2.2008.12.005 |
Equilibrator type: | Spray head above dynamic pool, with thermal jacket |
Equilibrator volume: | 0.95 L (0.4 L water, 0.55 L headspace) |
Is the equilibrator vented or not: | Vented |
Water flow rate: | 1.5 - 2.0 L/min |
Gas flow rate: | 70 - 150 ml/min |
How was temperature inside the equilibrator measured: | Hart Scientific model 1523 digital thermometer |
How was pressure inside the equilibrator measured: | External Setra 270 connected to the exit of the analyzer |
Drying method for gas: | Gas stream passes through a thermoelectric condenser (~5 C) and then through a Perma Pure (Nafion) dryer before reaching the analyzer (90% dry). |
SEA CO2 gas detector manufacturer: | Licor, Inc |
SEA CO2 gas detector model: | Licor 6262 |
SEA CO2 gas detector resolution: | Accuracy: +/- 2 uatm in fCO2_SW |
SEA CO2 gas detector uncertainty: | Precision: +/- 0.01 uatm in fCO2_SW |
Standardization technique: | The system runs a full cycle in approximately 7 hours. The cycle starts with 4 standard gases, then measures three rounds of 6 atmopherice samples followed by 50 surface water samples. Each new gas is flushed through the Licor Analyzer for 2 minutes prior to a stop-flow measurement. |
Standardization frequency: | Every 7 hours |
Standard gas manufacturer: | Standard gases are supplied by NOAA Earth System Research Laboratory, Global Monitoring Division, in Boulder, CO, and are directly traceable to the WMO scale. |
Standard gas concentration: | Std 1: CA05585, 280.18 ppm, owned by ESRL, used every ~5.0 hours. Std 2: CA06368, 328.12 ppm, owned by ESRL, used every ~5.0 hours. Std 3: CA05979, 381.89 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: 0.00 ppm, owned by AOML, used every ~26.5 hours. |
Standard gas uncertainty: | 0.01 ppm |
Water vapor correction method: | Details of the data reduction are described in Pierrot, et.al. (2009). |
Temperature correction method: | Details of the data reduction are described in Pierrot, et.al. (2009). |
At what temperature was pCO2 reported: | In situ sea surface temperature |
Uncertainty: | 0.01C |
Quality flag convention: | WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value |
Method reference: | Pierrot, D., Neill, C., Sullivan, K., Castle, R., Wanninkhof, R., Lüger, H., Johannessen, T., Olsen, A., Feely, R. A., & Cosca, C. E. (2009). Recommendations for autonomous underway pCO2 measuring systems and data-reduction routines. Deep Sea Research Part II: Topical Studies in Oceanography, 56(8-10), 512-522. https://doi.org/10.1016/j.dsr2.2008.12.005 |
Researcher name: | Denis Pierrot |
Researcher institution: | NOAA/AOML |
Sea Surface Temperature | |
---|---|
Abbreviation: | SST_C |
Unit: | degrees celcius |
Observation type: | Surface Underway |
Analyzing instrument: | SBE 38, Seabird, Inc. |
Detailed sampling and analyzing information: | In Bow Thruster room, about 1m after the intake which is directly through the ship's hull, before the SW pump |
Uncertainty: | Accuracy: 0.001C, Precision: 0.0003C |
Researcher name: | Maintained by University of Miami's MTG group |
Researcher institution: | University of Miami |
Sea Surface Salinity | |
---|---|
Abbreviation: | SAL_permil |
Observation type: | Surface Underway |
Analyzing instrument: | SBE 45, Seabird, Inc. |
Uncertainty: | Accuracy: +/- 0.005; Precision: 0.0002 |
Researcher name: | Maintained by University of Miami's MTG group |
Researcher institution: | University of Miami |
Atmospheric Pressure | |
---|---|
Abbreviation: | PRES_ATM@SSP_hPa |
Unit: | hPa |
Sampling instrument: | Vaisala, WXT520 |
Uncertainty: | Accuracy: +/- 0.5 hPa; Precision: 0.1 hPa |
Researcher name: | Maintained by University of Miami's MTG group |
Researcher institution: | University of Miami |
SUBMITTED BY: Kevin F. Sullivan (Kevin.Sullivan@noaa.gov)
SUBMISSION DATE: 2017-02-16
REVISION DATE: 2019-10-12
PREVIOUS VERSIONS: Version 1.1Version 2.2Version 3.3Version 4.4Version 5.5Version 6.6Version 7.7