Steinhoff, Tobias (2018): Surface pCO2 data of SONNE cruise SO235 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.887518
Always quote citation above when using data! You can download the citation in several formats below.
Related to:
Arévalo-Martínez, Damian L; Beyer, Maya; Krumbholz, Marita; Piller, Werner E; Kock, Annette; Steinhoff, T; Körtzinger, Arne; Bange, Hermann Werner (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 Science, 9(6), 1071-1087, https://doi.org/10.5194/os-9-1071-2013
Pierrot, Denis; Neill, Craig; Sullivan, Kevin; Castle, P H J; Wanninkhof, Rik; Lüger, H; Johannessen, Truls; Olsen, Are; Feely, Richard A; Cosca, Catherine 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
Steinhoff, Tobias (2010): Carbon and nutrient fluxes in the North Atlantic Ocean. urn:nbn:de:gbv:8-diss-57043
Other version:
Steinhoff, Tobias; Körtzinger, Arne (2017): Underway physical oceanography and carbon dioxide measurements during SONNE cruise SO235. GEOMAR - Helmholtz Centre for Ocean Research Kiel, PANGAEA, https://doi.org/10.1594/PANGAEA.877872
Coverage:
Median Latitude: -8.298614 * Median Longitude: 66.395391 * South-bound Latitude: -18.710700 * West-bound Longitude: 58.347200 * North-bound Latitude: 1.525100 * East-bound Longitude: 73.173200
Date/Time Start: 2014-07-23T20:03:00 * Date/Time End: 2014-08-05T18:23:00
Minimum DEPTH, water: 5 m * Maximum DEPTH, water: 5 m
Event(s):
SO235-track * Latitude Start: -20.154400 * Longitude Start: 57.493400 * Latitude End: 16.934300 * Longitude End: 82.287300 * Date/Time Start: 2014-07-23T00:00:00 * Date/Time End: 2014-08-07T00:00:00 * Campaign: SO235 (OASIS) * Basis: Sonne * Method/Device: Underway cruise track measurements (CT) * Comment: Port Louis - Male
Comment:
Instrument information:
- SST (± 0.05 deg C): SST was measured with a thermosalinograph from Seabird (SBE37) which was installed in the ships moonpool next to the inlet pump at approximately 6 m depth.
-Equilibrator temp (±0.05 °C): 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 teh equilibrator to 0.05 deg C.
-SSS (± 0.1 PSU): SSS was measured with a thermosalinograph from Seabird (SBE37) which was installed in the ships moonpool next to the inlet pump at approximately 6 m depth.
-Atmospheric press. (± 0.1 mbar): The atm. pressure was measured by the ships weather station.
-Equilibrator press (± 0.1 mbar): The equilibrator is open to the atmosphere. Here we assume to have atmospheric pressure in teh equilibration chamber.
-pCO2/fCO2 (±2µatm):
IR sensor: Licor 6252, calibrated with 3 standard gases.
Standard gases: Deuste Steininger (208.96 402 602.4), calibrated against
NOAA/CMDL standard gases. Resulting uncertainty: +- 0.5 ppm.
Water flow rate: 2-3 L min-1
Gas flow rate: 100 mL min-1
A Weiss equilibrator was used for teh equilibration. The sample gas stream was firts dried by cooling and then with a Nafion dryer. The gas was first led to the LI-6252 for the pCO2 measurements and then through a LGR N2O analyser. The system is described in detail in Arevalo et al. (2012) and the whole setup is described in Steinhoff (2010). Surface water is pumped continuously (by a torque flow pump) from the intake to the equilibrator. The equilibrator contains a water spray head, and as the water flows through it the dissolved CO2 equilibrates with the headspace. The headspace is dried and xCO2 is determined by an infrared sensor. Calculations were performed following Pierrot (2009) and are described in detail in Steinhoff (2010). The atmospheric xCO2 values are very noisy and are reported as is.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DATE/TIME | Date/Time | Steinhoff, Tobias | Geocode | ||
| 2 | Day of the year | DOY | day | Steinhoff, Tobias | ||
| 3 | LONGITUDE | Longitude | Steinhoff, Tobias | Geocode | ||
| 4 | LATITUDE | Latitude | Steinhoff, Tobias | Geocode | ||
| 5 | DEPTH, water | Depth water | m | Steinhoff, Tobias | Geocode | |
| 6 | Sea surface temperature | SST | °C | Steinhoff, Tobias | ||
| 7 | Sea surface salinity | SSS | Steinhoff, Tobias | |||
| 8 | Pressure, atmospheric | PPPP | hPa | Steinhoff, Tobias | ||
| 9 | Temperature, water | Temp | °C | Steinhoff, Tobias | inside the equilibrator | |
| 10 | Pressure, atmospheric | PPPP | hPa | Steinhoff, Tobias | Pressure inside the equilibrator | |
| 11 | xCO2 (water) at equilibrator temperature (dry air) | xCO2water_equ_dry | µmol/mol | Steinhoff, Tobias | mole fraction of CO2 in the equilibrator headspace (dry) at equilibrator temperature in ppm | |
| 12 | Carbon dioxide, partial pressure | pCO2 | µatm | Steinhoff, Tobias | partial pressure of CO2 in seawater at SST and 100% humidity in µatm | |
| 13 | Fugacity of carbon dioxide (water) at sea surface temperature (wet air) | fCO2water_SST_wet | µatm | Steinhoff, Tobias | fugacity of CO2 in seawater at SST and 100% humidity | |
| 14 | xCO2 (ambient atmosphere, dry air) | xCO2air | µmol/mol | Steinhoff, Tobias | mole fraction of CO2 of atmospheric air in ppm | |
| 15 | xCO2 (ambient atmosphere, dry air) | xCO2air | µmol/mol | Steinhoff, Tobias | running mean (500 minutes) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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