Table 5: Minimum mass of accreted water ( $M_{\rm water}$ ), minimum mass of accreted ices ( $M_{\rm ices}$ ) and corresponding minimum O/H abundance (compared to solar value) in Saturn's atmosphere required to fit the observed C enrichments. Calculations are presented for the minimum fits of both KAO C and ground-based N measurements (Kerola et al. 1997; Briggs & Sackett 1989) and Cassini C measurement (Flasar et al. 2005) in Saturn's atmosphere. Ranges of CO₂:CO:CH₄ and N₂:NH₃ gas-phase ratios used here are those determined by A05c (see text).
N₂:NH₃ = 1 N₂:NH₃ = 10

CO₂:CO = 4 CO₂:CO = 3 CO₂:CO = 2 CO₂:CO = 1 CO₂:CO = 1

KAO $M_{\rm water} / M_\oplus$ 2.2 2.5 3.0 4.0 4.6

$M_{\rm ices} / M_\oplus$ 5.4 5.6 5.9 6.6 7.6

O/H 5.1 5.4 5.8 6.6 7.6

Cassini $M_{\rm water} / M_\oplus$ 5.7 6.6 8.0 11.0 11.2

$M_{\rm ices} / M_\oplus$ 13.7 14.4 15.7 18.2 18.3

O/H 13.1 13.9 15.2 18.0 18.3

**Table 5:** Minimum mass of accreted water ( $M_{\rm water}$ ), minimum mass of accreted ices ( $M_{\rm ices}$ ) and corresponding minimum O/H abundance (compared to solar value) in Saturn's atmosphere required to fit the observed C enrichments. Calculations are presented for the minimum fits of both KAO C and ground-based N measurements (Kerola et al. 1997; Briggs & Sackett 1989) and *Cassini* C measurement (Flasar et al. 2005) in Saturn's atmosphere. Ranges of CO₂:CO:CH₄ and N₂:NH₃ gas-phase ratios used here are those determined by A05c (see text).
		N₂:NH₃ = 1	N₂:NH₃ = 10
		CO₂:CO = 4	CO₂:CO = 3	CO₂:CO = 2	CO₂:CO = 1	CO₂:CO = 1
KAO	$M_{\rm water} / M_\oplus$	2.2	2.5	3.0	4.0	4.6
	$M_{\rm ices} / M_\oplus$	5.4	5.6	5.9	6.6	7.6
	O/H	5.1	5.4	5.8	6.6	7.6
Cassini	$M_{\rm water} / M_\oplus$	5.7	6.6	8.0	11.0	11.2
	$M_{\rm ices} / M_\oplus$	13.7	14.4	15.7	18.2	18.3
	O/H	13.1	13.9	15.2	18.0	18.3

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