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ATMOSPHERIC DEPOSITION MODELING AND MONITORING OF NUTRIENTS
Citation:
DENNIS, R. L. ATMOSPHERIC DEPOSITION MODELING AND MONITORING OF NUTRIENTS. Presented at 4th Scientist to Scientist Meeting - Patuxent Wildlife Center, Laurel, MD, June 01 - 03, 2005.
Impact/Purpose:
The objective of this work is to contribute to multimedia studies and assessments by applying state-of-the-art atmospheric models, estimating the atmospheric contributions to multimedia issues and the sources of those contributions, and evaluating the models strengths and weaknesses. A sub-objective of this work is to provide the Chesapeake Bay modeling and assessment team with projections of anticipated reductions in atmospheric nitrogen deposition due to implementation of Clean Air Act regulations to assess the potential contribution these reductions can make to the Bay restoration goal. A sub-objective is also to provide an assessment of each Bay state's relative contribution to oxidized-nitrogen atmospheric deposition to the entire watershed to clarify the potential for voluntary efforts within each state, as part of a tributary strategy, to support the Bay restoration goal. A sub-objective is also to test aspects of linking atmospheric and watershed models for further research development and to test the more advanced versions of the one-atmosphere model to understand how better to reduce uncertainties.
Description:
This talk presents an overview of the capabilities and roles that regional atmospheric deposition models can play with respect to multi-media environmental problems. The focus is on nutrient deposition (nitrogen). Atmospheric deposition of nitrogen is an important contributor to coastal and marine environmental degradation. The roles for atmospheric models in the context of watershed studies are illustrated through examples from analyses with EPA regional air quality models. The new capabilities of EPA's Community Multiscale Air Quality Model, CMAQ, regarding deposition to the coastal oceans and the forecasting of air pollution, together with the National Weather Service, are also presented.