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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 NOAA Ship Ronald H. Brown cruise RB1205 in North Atlantic Ocean from 2012-09-02 to 2012-09-05 (NCEI Accession 0162170)

INVESTIGATORS:
Rik Wanninkhof ORCID logo - NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)
Denis Pierrot ORCID logo - NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)
Kevin F. Sullivan - NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)

PACKAGE DESCRIPTION: This dataset includes Surface underway, chemical, meteorological and physical data collected from NOAA Ship Ronald H. Brown Cruise RB1205 in the North Atlantic Ocean from 2012-09-02 to 2012-09-05. 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, 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 Ronald H. Brown research cruise RB1205 data set. The cruise Expedition code (EXPOCODE) is 33RO20120902.

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 NOAA Ship Ronald H. Brown cruise RB1205 in North Atlantic Ocean from 2012-09-02 to 2012-09-05 (NCEI Accession 0162170). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.7289/v5jd4v02. Accessed [date].


DATA PACKAGES RELATED TO THIS ONE:
none;
IDENTIFICATION INFORMATION FOR THIS DATA PACKAGE:
NCEI ACCESSION: 0162170
NCEI DOI: https://doi.org/10.7289/v5jd4v02
EXPOCODE: 33RO20120902.;
CRUISE ID: RB1205;

TYPES OF STUDY:
Surface underway;

TEMPORAL COVERAGE:
START DATE: 2012-09-02
END DATE: 2012-09-05

SPATIAL COVERAGE:
NORTH: 32.8
WEST: -79.7
EAST: -64.5
SOUTH: 31.5

GEOGRAPHIC NAMES:
North Atlantic Ocean;

PLATFORMS:
R/V Ronad H. Brown (ID: 33RO);

RESEARCH PROJECT(S):
Research Cruise;

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: CA06709, 284.75 ppm, owned by ESRL, used every ~ 3.5 hours. Std 2: CA02813, 363.24 ppm, owned by ESRL, used every ~3.5 hours. Std 3: CA07921, 423.57 ppm, owned by ESRL, used every ~3.5 hours. Std 4: CA07931, 545.88 ppm, owned by ESRL, used every ~3.5 hours. Std 5: 0.00 ppm, owned by AOML, used every ~20.0 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-21, Seabird, Inc.
Detailed sampling and analyzing information: Bow thruster room, before sea water pump, ~5 m below water line
Uncertainty: Accuracy: 0.01C, Precision: 0.001C
Researcher name: Denis Pierrot
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: Denis Pierrot
Researcher institution: NOAA/AOML
Atmospheric Pressure
Abbreviation: PRES_ATM@SSP_hPa
Unit: hPa
Sampling instrument: Vaisala, PTB330
Detailed sampling and analyzing information: Location: On bulkhead exterior on the port side of the radio room aft of the bridge at ~14 m above the sea surface
Uncertainty: Accuracy: +/- 0.2 hPa; Precision: 0.08 hPa
Researcher name: Denis Pierrot
Researcher institution: NOAA/AOML
PUBLICATIONS DESCRIBING THIS DATASET:
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
Feely, R.A., R. Wanninkhof, H.B. Milburn, C.E. Cosca, M. Stapp, and P.P. Murphy, A new automated underway system for making high precision pCO2 measurements onboard research ships, Analytica Chim. Acta, 377, 185-191, 1998.
Wanninkhof, R., & Thoning, K. (1993). Measurement of fugacity of CO2 in surface water using continuous and discrete sampling methods. Marine Chemistry, 44(2–4), 189–204. https://doi.org/10.1016/0304-4203(93)90202-y
ADDITIONAL INFORMATION:
none;
FUNDING AGENCY:
NOAA Climate Program Office Program
PROJECT TITLE: Surface Water pCO2 Measurements from Ships of Opportunity (SOOP)
PROJECT ID:

SUBMITTED BY: Kevin F. Sullivan (Kevin.Sullivan@noaa.gov)

SUBMISSION DATE: 2017-02-14