Prior to the industrial revolution, the biogeochemical cycling of nitrogen was powered by the diffuse flux of energy from the sun. Atmospheric N2 was fixed into biomass using reduced compounds derived from photosynthesis, and some abiotic fixation occurred during electrical storms. The reduced products of photosynthesis also provided the means of returning fixed nitrogen to its less biologically active forms, N2 and N2O, through the process of denitrification. During the present century, these precultural fluxes of nitrogen have been greatly augmented on local and regional levels by the fixation of N2 into NOx during fossil fuel combustion and by the production of ammonia for fertilizer by the Haber process.
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- Regional Nitrogen Mass Balance Model for the Florida Peninsula
Patrick L. Brezonik
- Springer Berlin Heidelberg