Reactive Oxidized Nitrogen Partitioning and Ozone Production Efficiencies during the PROPHET Summer 2000 and Summer 2001 Measurements Intensives
Abstract
Using measurements obtained during the Program for Research on Oxidants: PHotochemistry, Emissions, and Transport (PROPHET) Summer 2000 (NO, NO2, NOy, PAN, PPN, MPAN, HONO, isoprene nitrates, O3, and meteorological parameters) and Summer 20001 (NO, NO2, PAN, PPN, MPAN, HNO3, HONO, isoprene nitrates, O3, and meteorological parameters), we examine the partitioning among reactive nitrogen species and ozone production under the different meteorological conditions associated with the dominant flow regimes (north-northwesterly and southwesterly). Using calculated total oxidized reactive nitrogen (sum of individually measured compounds) and/or measured NOy and measured NOx, we determine ozone production efficiencies and background ozone for different flow regimes (on the order of 25 ppbv under northerly flow and 40 - 60 ppbv under southerly flow). We discuss evidence for NOy loss during northerly flow and evidence of photochemical processing of NOx during southwesterly and southerly flow. An assessment of year to year variability is also provided through comparisons of results from the Summer 2000 and Summer 2001 intensives with previously published results from the PROPHET Summer 1998 intensive.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2002
- Bibcode:
- 2002AGUFM.A51A0032C
- Keywords:
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- 0322 Constituent sources and sinks;
- 0345 Pollution: urban and regional (0305);
- 0365 Troposphere: composition and chemistry;
- 0368 Troposphere: constituent transport and chemistry