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RESEARCH PROGRAM FOR BRACE - PROVIDING NO AND SPECIFIC NO2 MEASUREMENTS FOR THE BRACE DATABASE DURING THE MAY '02 FIELD STUDY
Citation:
Kronmiller, K. G., M. L. Wheeler, AND W A. McClenny. RESEARCH PROGRAM FOR BRACE - PROVIDING NO AND SPECIFIC NO2 MEASUREMENTS FOR THE BRACE DATABASE DURING THE MAY '02 FIELD STUDY. Presented at BRACE Field Study Workshop, Tampa, FL, February 3-4, 2003.
Impact/Purpose:
1. Provide the Agency with semi-continuous and real-time instrumentation for its monitoring of ozone, ozone precursors, and reaction products of ozone formation.
2. Provide the Agency with semi-continuous and real-time instrumentation for its monitoring of water-soluble PM components and water-soluble atmospheric gases.
Description:
Three scientists from the EPA, RTP facility in Research Triangle Park, N.C. worked with the State of Florida and BRACE scientists to provide accurate and precise NO and specific NO2 measurements at two monitoring sites, the rural Sydney site and the near-bay, suburban Gandy site. Most ambient measurements of NO2 are not specific and usually provide only an upper limit for NO2. However, the use of a photolytic converter to convert NO2 to NO can be used with a NO,O3 chemiluminescence detector to provide more specific NO2 measurements. The EPA monitoring effort is the first application of a commercially available, stand-alone photolytic converter that can be adapted for use with existing trace level chemiluminescence monitors. These measurements contribute to the overall BRACE database. Atmospheric models will be applied to the database in an attempt to model the atmospheric processes occurring in the Tampa area such as atmospheric chemistry and deposition of atmospheric constituents.
This extended abstract has been subjected to the Agency's peer and administrative review and has been approved for publication as an EPA document. Mention of trade names of commercial products does not constitute endorsement or recommendation for use.