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Critical Loads for Inorganic Nitrogen Deposition in the Colorado Front Range, USA

Citation

Williams, Mark W, and Tonnessen, Kathy A, Critical Loads for Inorganic Nitrogen Deposition in the Colorado Front Range, USA: .

Summary

We suggest an empirical approach for determining critical loads for inorganic nitrogen (N) deposition in wetfall to the central Rocky Mountains (USA). We define "critical loads" as a deposition amount above which natural resources can be negatively affected. The arithmetic average from 1992 to 1996 of annual inorganic N deposition in wetfall at the eight National Acid-Deposition Program (NADP) sites located at elevations >2500 m in the central Rocky Mountains ranged from 2.5 to 3.5 kg�ha-1�yr-1. In contrast, inorganic N deposition was <2.5 kg�ha-1�yr-1 at all 23 NADP sites below 2500 m in elevation. At the Niwot Ridge NADP site in the Colorado Front Range, a simple linear regression of inorganic N in wetfall with time shows a significant [...]

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Title Citation Critical Loads for Inorganic Nitrogen Deposition in the Colorado Front Range, USA

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