GH = gas hydrate; pv = pore volume, cv = core volume. a Assuming a CH4 fraction of 97 vol.-% of the entire gas (Section 3.3.1). b Inferred from pressure-volume relationships during core degassing according to Milkov et al. (2004)). c Nominal CH4 in situ concentrations in Units 1 and 2 (nCCH4U1, nCCH4U2) based on gas volumes of DAPC 09 and 12 devoid of Unit 3 (see Table 2; Fig. 4). d Concentration of hydrate-bound CH4 (CCH4hbUx) indicates the difference between nCCH4Ux and shpUx. Nominal concentrations of hydrate-bound CH4 in sediments belonging to Unit 2 (CCH4hbU2) were 310.5 mM, resulting in nominal hydrate fractions of fGHU2PV=5.2% of pore volume and fGHU2CV=4.0% of core volume, respectively.