Table 6-1: Measured Quantities

Measured Quantity			Variable	Units	Typical value	Typical error
Day and time				days, hours
Temperature (tank water)			t	deg C	15	± 0.1
Paddle Speed			rpm	revs min-1	13	± 0.1
pCO₂ (equilibrium headspace)			pCO₂	ppm	0 - 350	± 2
	pCO₂ in		hci	ppm	700	± 2
influx headspace	pCO₂ out		hco	ppm	525	± 3
	flow rate		hcf	ml min^-1	60	± 0.5
	pCO₂ in		lci	ppm	5	± 1
efflux headspace	pCO₂ out		lco	ppm	175	± 3
	flow rate		lcf	ml min^-1	60	± 0.5
TCO₂		ü ý þ	see note 1	mmol l ^-1	1.2 - 1.8	± 0.05
total alkalinity				mmol l^-1	2.4	± 0.05
pH					8.0 - 9.5	± 0.1
chlorophyll				mg l^-1	0 - 500	8%
SF₆ gas exchange		see note 2		cm hr^-1	2
Oxygen gas exchange		see note 2		cm hr^-1	3