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Bay Region Atmospheric Chemistry Experiment (Brace)

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Abstract: The Tampa Bay Estuary Program (TBEP) was formed in 1991 to assist the community in developing a comprehensive plan to restore and protect Tampa Bay. The ecological indicator of the health of the Bay is the coverage of seagrasses, historically in decline, which are important to the Bay's aquatic habitat and food web. Seagrass decline is linked to excess of plant-stimulating forms of nitrogen to the bay, promoting algae growth, which shades out light needed to sustain seagrasses. One element of the TBEP is a private-local-state, multi-agency Nitrogen Management Consortium that seeks to limit nitrogen loading to the Bay to the 1992-1994 average. Present estimates suggest atmospheric deposition comprises ~ 30% of the nitrogen budget of the Bay. This estimate is based, however, on limited ambient monitoring data and simple models.

In BRACE USEPA NERL will join with Florida DEP and TBEP to increase the intensity, sophistication and spatial scope of monitoring and modeling and provide better information on air quality in the Tampa Bay area. The result will be improved estimates of the effects of local and regional emissions of oxides of nitrogen (NOx) on the Bay and the benefits to be gained from implementation of emissions reduction strategies. The two primary objectives of BRACE are to (i) provide TBEP with robust estimates of deposition of biologically active forms of nitrogen to Tampa Bay and its watershed and (ii) assess the Tampa Bay air quality before and after the TECO Gannon Station re-powering from coal to natural gas. EPA NERL is contributing to BRACE by participating in atmospheric monitoring and modeling activities. Specifically NERL will conduct source apportionment modeling to identify the sources of observed NOx and PM2.5 and run a state-of-the-art model to evaluate the formation of ozone and secondary aerosols.

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Citation:Landis, M. S. Bay Region Atmospheric Chemistry Experiment (Brace). Presented at Science Forum 2003, Washington, DC, May 5-7, 2003.
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Contact: Liz Hope - (919) 541-2785 or hope.elizabeth@epa.gov
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Division: Human Exposure & Atmospheric Sciences Division
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Branch: Environmental Characterization & Apportionment Branch
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Product Type: Abstrct/Oral
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Presented: 05/06/2003
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Related Entries:
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Bullet Item Atmospheric Mercury Research
spacer Relationship Reason:   A Project of the Product
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Last Updated on Monday, October 22, 2007
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