Project Overview

Acidification of waterbodies is linked to deposition of sulfur and nitrogen oxides. This project will assess the relationship between a proposed index of aquatic acidification due to airborne pollutants and the concentrations in air of ammonia, ammonium, nitrogen oxides and sulfur oxides. Data comes from participation in both the Ammonia Monitoring Network (AMoN) and EPA's CASTNet. AMoN is a NADP network measuring NH3 concentrations across the United States with the goal of providing long term trends in ambient NH3 concentrations and depositions. The VMC air quality site began participating in this network in November 2012 as a component of the AAI. CASTNET is a national air quality monitoring network designed to provide data to assess trends in air quality, atmospheric deposition, and ecological effects due to changes in air pollutant emissions.CASTNET measurements are used to assess long-term, regional trends in sulfur and nitrogen pollutants.


The objective of AMoN is to measure NH3 concentrations in a spatially dense, cost-efficient network with data of defined high quality, ideally operating for several decades. This will provide data to evaluate long-term trends in ambient NH3 concentrations and deposition. Once baseline concentrations are established using measurements from the AMoN, any changes in ambient NH3 concentrations due to emission reduction regulations can be assessed.

Dataset Availability

Downloadable: 3 datasets

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Status - Active

Start date: 2012-12-20

Study Area

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