Cruises

fCO2 (╬╝atm)

FOCAL 6

(January - February 84)

CITHER 1

(January - March 93)

EQUALANT 99 (July - August 99)

Measured

373 ± 23

370 ± 30

398 ± 30

Calculated

377 ± 8

373 ± 5

403 ± 11