Table 2:

Relative NIR clathrate hydrate and methane ice integrated intensities^a.

Dominant transitions	Clathrate (5.6 K)	Methane iceb
	0.063	0.054c
	0.010	0.013
	0.511	0.524
	1.0a	1.0a
	0.099	0.095
	0.014	0.014
	0.004	0.004d
	0.028	0.029
	0.042	0.061

Notes.  ^(a) Normalised to the transitions; ^(b) Brunetto et al. (2008) at 16 K; ^(c) intensity before normalisation estimated from the ratio of absorption coefficient of / from Quirico & Schmitt (1997) at 21 K, assuming the same line width for both transitions; ^(d)  integrated intensity before normalisation estimated from the spectrum of the blended / lines from Fig. 2b in Quirico & Schmitt (1997) at 21 K.