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 loses 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 loses 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.
