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 R/V Sonne cruises SO234 and SO235 (EXPOCODEs: 06BE20140710 and 06BE20140723) in the Indian Ocean from 2014-07-10 to 2014-08-08 (NCEI Accession 0162204)
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, GermanyPACKAGE DESCRIPTION: This dataset includes surface underway, chemical, meteorological and physical data collected from R/V Sonne cruises SO234 and SO235 in the Indian Ocean from 2014-07-10 to 2014-08-08. These data include 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. 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 Tobias Steinhoff of GEOMAR Helmholtz Centre for Ocean Research as part of the R/V Sonne research cruises in the Indian Ocean. The cruise Expedition codes (EXPOCODE) are 06BE20140710 and 06BE20140723.
CITE AS: Körtzinger, Arne; Steinhoff, Tobias (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 R/V Sonne cruises SO234 and SO235 (EXPOCODEs: 06BE20140710 and 06BE20140723) in the Indian Ocean from 2014-07-10 to 2014-08-08 (NCEI Accession 0162204). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.7289/v5st7n2x. Accessed [date].
none;
Surface underway;
TEMPORAL COVERAGE:
SPATIAL COVERAGE:
GEOGRAPHIC NAMES:
PLATFORMS:
RESEARCH PROJECT(S):
VARIABLES / PARAMETERS:
| pCO2 (fCO2) autonomous | |
|---|---|
| Abbreviation: | pCO2_SW@SST |
| Unit: | uatm |
| Observation type: | Surface underway |
| Measured or calculated: | Measured |
| Calculation method and parameters: | following Pierrot et al. (2009), Deep-Sea Res. |
| Sampling instrument: | Seawater pump described in Arevalo-Martinez et al. (2013), Ocean Sci., https://doi.org/10.5194/os-9-1071-2013 |
| Location of seawater intake: | ships moonpool |
| Analyzing instrument: | Infrared Analyzer: LI-COR model 6252 |
| Detailed sampling and analyzing information: | Arevalo-Martinez, D.L., M. Beyer, M. Krumbholz, I. Piller, A. Kock, T. Steinhoff, A. Körtzinger, and H. W. Bange (2013). A new method for continuous measurements of oceanic and atmospheric N2O, CO and CO2: performance of off-axis integrated cavity output spectroscopy (OA-ICOS) coupled to non-dispersive infrared detection (NDIR). Ocean Sci., 9, 1071-1087, https://doi.org/10.5194/os-9-1071-2013. |
| 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: | 2-3 L min-1 |
| Gas flow rate: | 100 mL min-1 |
| How was temperature inside the equilibrator measured: | Due to a broken temperature probe, we used the temperature of an Aanderaa Optode that was placed in a continously flushed water bath next to the equilibrator. We still estimate the accuracy of the equilibrator to 0.05 deg C. |
| How was pressure inside the equilibrator measured: | The equilibrator is open to the atmosphere. Here we assume to have atmospheric pressure in the equilibration chamber. |
| Drying method for gas: | ice cooled column and subsequent Nafion dryer |
| 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: | +/- 0.5 ppm |
| Standardization technique: | calibrated against NOAA/CMDL standard gases. Resulting uncertainty: +/- 0.5 ppm. |
| Standardization frequency: | every 4 hours |
| Standard gas manufacturer: | Deuste Steininger |
| Standard gas concentration: | 208.96 402 602.4 |
| Standard gas uncertainty: | 0.5 |
| At what temperature was pCO2 reported: | SST |
| Uncertainty: | 5 uatm |
| Researcher name: | Tobias Steinhoff |
| Researcher institution: | GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany |
| Sea Surface Temperature | |
|---|---|
| Abbreviation: | SST |
| Unit: | Deg. C |
| Observation type: | Surface underway |
| Sampling instrument: | pump at approximately 6 m depth |
| Analyzing instrument: | Seabird (SBE37) |
| Uncertainty: | +/- 0.05 deg C |
| Researcher name: | Tobias Steinhoff |
| Researcher institution: | GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany |
| Sea Surface Salinity | |
|---|---|
| Abbreviation: | SSS |
| Observation type: | Surface underway |
| Sampling instrument: | pump at approximately 6 m depth |
| Analyzing instrument: | Seabird (SBE37) |
| Uncertainty: | +/- 0.1 |
| Researcher name: | Tobias Steinhoff |
| Researcher institution: | GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany |
| Equilibrator temperature | |
|---|---|
| Abbreviation: | Equi Temp |
| Unit: | Deg. C |
| Observation type: | Surface underway |
| Uncertainty: | +/-0.05 deg C |
| Researcher name: | Tobias Steinhoff |
| Researcher institution: | GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany |
| Athmospheric Presuure | |
|---|---|
| Abbreviation: | Atm. Pressure |
| Unit: | mbar |
| Analyzing instrument: | The atmospheric pressure was measured by the ships weather station |
| Uncertainty: | +/- 0.1 mbar |
| Researcher name: | Tobias Steinhoff |
| Researcher institution: | GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany |
| Equilibrator Pressure | |
|---|---|
| Abbreviation: | Equi Press |
| Unit: | mbar |
| Analyzing instrument: | The equilibrator is open to the atmosphere. Here we assume to have atmospheric pressure in the equilibration chamber |
| Uncertainty: | +/- 0.1 mbar |
| Researcher name: | Tobias Steinhoff |
| Researcher institution: | GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany |
SUBMITTED BY: Tobias Steinhoff (tsteinhoff@geomar.de)
SUBMISSION DATE: 2017-02-23
