Table 5. Summary of the comparison results for total alkalinity (TAlk)
for each of the 15 crossover comparisons during the Global CO₂ Survey in the Pacific


Location number/ Crossover comparison	Nominal position		Cruise name/ WOCE line		ΔSalinity between cruises	SD Salinity between cruises	ΔO₂ between cruises (µmol/kg)	SD O₂ between cruises (µmol/kg)	ΔTAlk between cruises (µmol/kg)	SD TAlk between cruises (µmol/kg)
Location number/ Crossover comparison	Long.	Lat.	Cruise 1	Cruise 2	Cruise 1-2	SD Salinity between cruises	Cruise 1-2	SD O₂ between cruises (µmol/kg)	Cruise 1-2	SD TAlk between cruises (µmol/kg)

6 / 6	170� W	17� S	P15S	P21	-0.007	0.001	-6.0	1.7	-0.2	0.3
7 / 9	170� W	10� S	P15S	P15N	0.001	0.001	-3.0	0.2	-5.4	10.4
7 / 10	170� W	10� S	P15S	P31	0.000	0.002	0.0	2.6	3.5	5.6
8 / 11	170� W	5� S	P15S	P15N	0.001	0.001	-3.3	0.8	4.6	2.1
8 / 13	170� W	5� S	P15S	EQS92	-0.002	0.002	2.3	5.2	7.3	8.3
9 / 14	170� W	0�	P15S	P15N	-0.001	0.001	-1.3	0.9	7.1	1.1
9 / 16	170� W	0�	P15S	EQS92	0.002	0.001	2.2	1.2	3.5	5.4
13 / 20	150� W	17� S	P16	P21	-0.003	0.005	0.1	0.2	1	0.9
13 / 21	150� W	17� S	P21	P31	0.001	0.005	0.3	0.4	-7.3	1.1
13 / 22	150� W	17� S	P31	P16	0.002	0.002	0.4	0.3	6.3	2
21 / 30	110� W	0�	P18	EQS92	-0.012	0.012	0.6	6.0	-10.9	6.6
21 / 31	110� W	0�	P18	EQF92	0.018	0.022	-3.2	1.6	-7.5	7.7
22 / 32	110� W	5� N	P18	EQS92	-0.006	0.004	-5.1^a	1.5	-11.5	4.6
22 / 33	110� W	5� N	P18	EQF92	-0.001	0.004	3.7	6.6	7.8	4
25 / 36	103� W	17� S	P18	P21	0.004	0.004	-0.9	1.5	-2.1	0.8

Mean of the absolute value of the difference Standard deviation of the absolute value of the difference									5.7 3.3

^aLinear regression applied.

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