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Measurement of Rural Sulfur Dioxide and Particle Sulfate: Analysis of Castnet Data, 1987 1996

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Abstract:The Clean Sir Status and Trends Network (CASTNet) was implemented by the U.S. Environmental Protection Agency (EPA) in 1991 in response to Title IX of the Clean Air Amendments of 1990, which mandated the deployment of a national ambient air monitoring network to track progress of the implementation of emission reduction programs in terms of deposition, air quality, and changes to affected ecosystems. CASTNet evolved from the National Dry Deposition Network (NDDN).
CASTNet currently consists of 45 sites in the eastern United States and 28 sites in the West. Each site measures sulfur dioxide (SO2), nitric acid (HNO3), particle sulfate (SO4), particle nitrate (NO3), and ozone. Nineteen sites collect precipitation samples. NDDN/CASTNet uses a uniform set of site-selection criteria which provides the data user with consistent measures to compare each site. These criteria also ensure that, to the extent possible. CASTNet sites are located away from local emission sources.
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Citation:Baumgardner, R. E., S. Isil, K. Fitzgerald, and J. Bowser. Measurement of Rural Sulfur Dioxide and Particle Sulfate: Analysis of Castnet Data, 1987 1996. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION 49:1266-1279, (1999).
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Contact: Chris Siebert - (702) 798-2234 or siebert.christopher@epa.gov
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Division: Environmental Sciences Division
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Branch: Landscape Characterization Branch (RTP)
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Product Type: Journal
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Published: 09/30/1999
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Related Entries:
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Bullet Item Atmospheric Ecosystem Stressor Pattern and Trend Analysis
spacer Relationship Reason:   A Project of the Product
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Last Updated on Monday, October 22, 2007
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