Description of model in words:

• The vegetation is a simple box, where there is a constant carbon input in form of net primary productivity (NPP)
• The vegetation looses carbon to the soil via tissue turnover and death
• The soil carbon pool is a simple box that receives carbon from the vegetation
• The soil looses carbon (to the atmosphere)

Mathematical instruction

• Both vegetation and soil carbon losses are proportional to the respective pool size, and the proportionality constants are 1 and 0.16 yr-1, respectively.
• New carbon is added through net primary productivity (NPP) which is 600 g m-2 yr-1.