Partial pressure of carbon dioxide, temperature, salinity and other variables collected from the coastal surface underway observations from NOAA Ship Gordon Gunter in the Gulf of Mexico and North Atlantic Ocean during 2018 (NCEI Accession 0172376)
- NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)
- NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)PACKAGE DESCRIPTION: This dataset includes 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 NOAA Atlantic Oceanographic and Meteorological Laboratory as part of NOAA Ship Gordon Gunter research coastal cruises in 2018.
CITE AS: Wanninkhof, Rik; Sullivan, Kevin F.; Pierrot, Denis (2018). Partial pressure of carbon dioxide, temperature, salinity and other variables collected from the coastal surface underway observations from NOAA Ship Gordon Gunter in the Gulf of Mexico and North Atlantic Ocean during 2018 (NCEI Accession 0172376). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.7289/v5gm85mt. Accessed [date].
Coastal;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 7000 |
| 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 7000 |
| SEA CO2 gas detector resolution: | 0.01 uatm |
| SEA CO2 gas detector uncertainty: | 2 uatm |
| Standardization technique: | The analyzer is calibrated every 4.3 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. |
| Standardization frequency: | Every 4 hours |
| Standard gas manufacturer: | Scott-Marrin, Inc. |
| Standard gas concentration: | Std 1: LL100000, 0.00 ppm, owned by AOML, used every ~4.5 hours. Std 2: JA02140, 234.21 ppm, owned by AOML, used every ~4.5 hours. Std 3: JA02689, 406.90 ppm, owned by AOML, used every ~4.5 hours. Std 4: JB03673, 510.35 ppm, owned by AOML, used every ~4.5 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: | Kevin Sullivan |
| 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: | After sea water pump, ~3 m below sea surface |
| Uncertainty: | Accuracy: 0.001C, Precision: 0.0003C |
| Researcher name: | Kevin Sullivan |
| Researcher institution: | NOAA/AOML |
| 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: | Kevin Sullivan |
| Researcher institution: | NOAA/AOML |
| Atmospheric Pressure | |
|---|---|
| Abbreviation: | PRES_ATM@SSP_hPa |
| Unit: | hPa |
| Analyzing instrument: | Vaisala, Model: PTB220 |
| Uncertainty: | Accuracy: +/- 0.5 hPa; Precision: 0.01 hPa |
| Researcher name: | Kevin Sullivan |
| Researcher institution: | NOAA/AOML |
SUBMITTED BY: Kevin F. Sullivan (Kevin.Sullivan@noaa.gov)
SUBMISSION DATE: 2018-04-04
REVISION DATE: 2019-02-01
PREVIOUS VERSIONS: Version 1.1Version 2.2Version 3.3Version 4.4
