Article history: Microbial denitriﬁcation occurs in anaerobic soil microsites and aquatic environments leading to produc- Received 25 February 2017 tion of N O and N gases, which eventually escape to the atmosphere. Atmospheric concentrations of N O 2 2 2 Received in revised form 7 June 2017 have been on the rise since the beginning of the industrial revolution due to large-scale manipulations of Accepted 9 June 2017 the N cycle in managed ecosystems, especially the use of synthetic nitrogenous fertilizer. Here we docu- Available online 28 June 2017 ment and test a microbial denitriﬁcation model identiﬁed as IMWJ and implemented as a submodel in the EPIC terrestrial ecosystem model. The IMWJ model is resolved on an hourly time step using the concept Keywords: that C oxidation releases electrons that drive a demand for electron acceptors such as O and oxides of Microbial respiration − − N (NO , NO , and N O). A spherical diffusion approach is used to describe O transport to microbial 3 2 2 2 Nitrous oxide surfaces while a cylindrical diffusion method is employed to depict O transport to root surfaces. Oxygen Gas transport equation uptake by microbes and roots is described with
Ecological Modelling – Elsevier
Published: Sep 10, 2017
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