Sullivan, Kevin
NOAA/AOML CIMAS
4301 Rickenbacker Causeway, Miami, Fl 33149
(305) 361-4382
kevin.sullivan@noaa.gov
Wanninkhof, Rik
NOAA/Atlantic Oceanographic & Meteorological Laboratory
4301 Rickenbacker Causeway, Miami Fl, 33149
305-361-4379
Rik.Wanninkhof@noaa.gov
Pierrot, Denis
NOAA/Atlantic Oceanographic & Meteorological Laboratory
4301 Rickenbacker Causeway, Miami Fl, 33149
305-361-4441
Denis.Pierrot@noaa.gov
NOAA Climate Program Office; NOAA Ocean Acidification Program
20191119
20191119
GU1905 Fall EcoMon
Research Cruise
Ship
Equilibrator-IR or CRDS or GC
33GG20191015
AOML_SOOP_OA, NE EcoMon
-75.9
-65.7
42.6
35.4
20191016
20191101
Newport, RI
R/V Gordon Gunter
33GG
NOAA
xCO2_EQU_ppm
Mole fraction of CO2 in the equilibrator headspace (dry) at equilibrator temperature (ppm)
ppm
xCO2_ATM_ppm
Mole fraction of CO2 measured in dry outside air (ppm)
ppm
xCO2_ATM_interpolated_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)
ppm
PRES_EQU_hPa
Barometric pressure in the equilibrator headspace (hPa)
hPa
PRES_ATM@SSP_hPa
Barometric pressure measured outside, corrected to sea level (hPa)
hPa
TEMP_EQU_C
Water temperature in equilibrator (°C)
Degree C
SST_C
Sea surface temperature (°C)
Degree C
SAL_permil
Sea surface salinity on Practical Salinity Scale (o/oo)
ppt
fCO2_SW@SST_uatm
Fugacity of CO2 in sea water at SST and 100% humidity (μatm)
μatm
fCO2_ATM_interpolated_uatm
Fugacity of CO2 in air corresponding to the interpolated xCO2 at SST and 100% humidity (μatm)
μatm
dfCO2_uatm
Sea water fCO2 minus interpolated air fCO2 (μatm)
μatm
WOCE_QC_FLAG
Quality control flag for fCO2 values (2=good, 3=questionable)
None
QC_SUBFLAG
Quality control subflag for fCO2 values, provides explanation when QC flag=3
None
5 meters
Bow
Spray head above dynamic pool, no thermal jacket
0.95 L (0.4 L water, 0.55 L headspace)
1.5 - 2.0 L/min
70 - 150 ml/min
Yes
Gas stream passes through a thermoelectric condenser (~5 °C) and then through a Perma Pure (Nafion) dryer before reaching the analyzer (90% dry).
Primary equilibrator is vented through a secondary equilibrator.
Yes, 5 readings in a group every 3 hours
Bow mast, ~18 meters above sea surface
Gas stream passes through a thermoelectric condenser (~5 °C) and then through a Perma Pure (Nafion) dryer before reaching the analyzer (90% dry).
IR
LI-COR
6262
Every 140 seconds, except during calibration
± 0.01 μatm in fCO2_SW
± 2 μatm in fCO2_SW
± 0.01 μatm in fCO2_ATM
± 0.5 μatm in fCO2_ATM
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: JB03276, 471.65 ppm, owned by AOML, used every ~4.5 hours.
3
The analyzer is calibrated every 4 hours with field standards that in turn were calibrated with primary standards that are directly traceable to the WMO X2007 scale. The zero gas is ultra-high purity air.
Instrument is located in an air-conditioned laboratory. Ultra-High Purity air (0.0 ppm CO2) and the high standard gas are used to zero and span the LI-COR analyzer.
Pierrot, D., C. Neil, K. Sullivan, R. Castle, R. Wanninkhof, H. Lueger, T. Johannessen, A. Olsen, R. A. Feely, and C. E. Cosca (2009), Recommendations for autonomous underway pCO2 measuring systems and data reduction routines, Deep-Sea Res II, 56, 512-522.
details of CO2 sensing (not required)
xco2(dry)
In engine room, about 2 m after the seachest, before the SW pumps.
Seabird, Inc.
SBE 38
0.001
0.0003
Factory calibration
Manufacturer's Resolution is taken as Precision; Maintained by ship.
Inserted into equilibrator ~5 cm below water level
Hart
1521
0.025
0.001
Factory calibration
Resolution is taken as Precision.
Attached to equilibrator headspace.
Setra
270
0.05
0.015
Factory calibration
Manufacturer's Resolution is taken as Precision.
Next to the bridge, ~15 m above the sea surface water
RMYoung
61201
± 0.5 hPa
0.01 hPa
Factory calibration
yes
Manufacturer's Resolution is taken as Precision; Maintained by ship.
In Chem lab, next to CO2 system
Seabird
SBE 45
± 0.005 o/oo
0.0002 o/oo
Factory calibration
Manufacturer's Resolution is taken as Precision; Maintained by ship.
The analytical system operated well during this cruise.
Original Data Location: http://www.aoml.noaa.gov/ocd/ocdweb/gunter/gunter_introduction.html
Full unprocessed data files from analytical instrument including flow information and ship's meteorological and TSG data at time of sampling can be obtained upon request.
NA
underway