N14C: A plant-soil nitrogen and carbon cycling model to simulate terrestrial ecosystem responses to atmospheric nitrogen deposition

► N14C is a new model linking soil-plant carbon and nitrogen cycles. ► Its main purpose is to simulate the effects of anthropogenic N deposition. ► N14C has been parameterised with field data for 42 sites in N Europe. ► Results suggest an approximate doubling of NPP due to N deposition. ► Leaching rates of inorganic N depend upon plant type.