Table 1.

Models Used for the Calculation of Age and Transit Time Distributions

Model	Description	Number of pools	Reference
RothC	Rothamsted soil carbon model.	4	Jenkinson et al. (1990)
	This implementation excludes the
	inert pool.
Century	Implementation of the Century	5	Parton et al. (1987)
	model as originally described for
	temperate grasslands
Yasso07	Model of litter decomposition	5	Tuomi et al. (2009)
	parameterized from a global‐scale
	database
ICBM	Introductory carbon model,	2	Andren and Katterer (1997)
	parameters for an experimental treatment
	without N and straw additions,
	interpreted as a control treatment
CLM4cn‐Needleleaf	Community land model version 4	8	Wieder et al. (2014)
	with parameterization for needleleaf
	evergreen forest
CLM4cn‐Deciduous	Community land model version 4	8	Wieder et al. (2014)
	with parameterization
	deciduous forest
CLM4cn‐Tropical	Community land model version 4	8	Wieder et al. (2014)
	with parameterization for tropical
	forest
CESM	Reduced complexity model	3	He et al. (2016)
	obtained from the output of the
	CESM model
IPSL	Reduced complexity model	3	He et al. (2016)
	obtained from the output of the IPSL model
MRI	Reduced complexity model	3	He et al. (2016)
	obtained from the output of the MRI model

Note. Their matrix representation can be found in Appendix A. ICBM = Introductory Carbon Balance Model; CLM4 = Community Land Model version 4; CESM = Community Earth System Model; IPSL = L'Institut Pierre‐Simon Laplace Coupled Model; MRI = Meteorological Research Institute Earth System Model.