Gridded global organic matter reactivity (RCM parameter a, in years)

Gridded data product for the globally extrapolated RCM parameter a (in yrs) and its respective reactivity k (in 1/yrs from k = nu/a). This represents a combination of the two datasets presented in the main text in Fig. 9. The deep-sea extrapolation uses data from Seiter, Hensen, and Zabel (2005), while the shallow ocean (SFD<1000m) uses data from Jørgensen, Wenzhöfer, Egger, and Glud (2022). The area South-Est of Australia remains empty as in Seiter et al. (2005) and for reasons given in the main text.