Skip to main content

Table 2. Analytical methods used to measure the carbon system parameters

No. Cruise name Period Dissolved inorganic carbon Total alkalinitya CO2 fugacity pH
1 A21/A12 1/23/90-3/8/90 Coulometer   Gas chromatographyb  
2 A09 2/10/91-3/23/91 SOMMAc Fulld    
3 A16S 7/11/91-9/2/91 SOMMA Full Infrared analysise  
4 A01E 9/2/91-9/26/91 SOMMA Full    
5 A12B 5/21/92-8/5/92 Coulometer      
6 A05 7/15/92-7/23/92 Calculated 1-point   Electrode
7 A10 12/27/92-1/31/93 SOMMA Full    
8 A11 12/22/92-2/1/93        
9 A07 1/2/93-1/10/93 Gas chromatography   Gas chromatography Electrode
10 A06 1/2/93-3/19/93 Gas chromatography   Gas chromatography Electrode
11 A16N 7/4/93-8/30/93 SOMMA Full Infrared analysise Spectrophotometric
12 A17 1/4/94-3/22/94 SOMMA 1-point   Potentiometricf
13 A15 4/3/94-5/21/94 SOMMA Full    
14 A08 3/29/94-5/11/94 SOMMA   Gas chromatographyg  
15 A13 2/20/95-3/2/95 SOMMA 1-point    
16 A14 1/12/95-2/16/95 SOMMA 1-point   Potentiometric
17 A23 3/20/95-5/6/95 Coulometer   Gas chromatographyh  
18 A01W 6/95-7/95 Coulometer Full    
19 A12BR 3/17/96-5/20/96 Coulometer      
20 A02 6/11/97-7/3/97 SOMMA Full    
21 A20 7/17/97-8/10/97 SOMMA Full   Electrode
22 A22 8/15/97-9/3/97 SOMMA Full   Electrode
23 A24 8/15/97-9/3/97 SOMMA Full   Electrode
24 A05R 1/24/98-2/23/98 SOMMA Full Gas chromatographyg Spectrophotometric
25 A01WR 6/22/98-7/8/98 Coulometer Full   Electrode

aDetermined by potentiometric titration, either a full curve ("Full") or a single-point ("1-point") titration.

b500-mL samples, analysis by gas chromatography. (Chipman, D. W., J. Marra, and T. Takahashi. Primary production at 47° N and 20° W in the North Atlantic Ocean: A comparison between the 14C incubation method and mixed layer carbon budget observations. Deep-Sea Research II 40, 151-69, 1993.)

cSingle-operator multiparameter metabolic analyzer.

dAnalyzed shoreside.

e500-mL samples, infrared analysis. [Wanninkhof, R., and K. Thoning. Measurement of fugacity of CO2 in surface water using continuous and discrete sampling methods. Mar. Chem. 44 (2-4), 189-205, 1993.]

fA17C only.

g60- or 120-mL samples, analysis by gas chromatography. (Neill, C., K. M. Johnson, E. Lewis, and D. W. R. Wallace. Small volume, batch equilibration measurement of fCO2 in discrete water samples. Limnol. Oceanogr. 42, 1774-83, 1997.)

hMeasured at 4°C.

Last modified: 2021-03-17T18:30:24Z