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Ozone And Reactive Oxidized Nitrogen Chemistry In The Northeast U.S, Matthew Ninneman
Ozone And Reactive Oxidized Nitrogen Chemistry In The Northeast U.S, Matthew Ninneman
Legacy Theses & Dissertations (2009 - 2024)
Ongoing reductions in oxides of nitrogen concentrations ([NOx] = nitric oxide ([NO]) + nitrogen dioxide ([NO2])) throughout the continental United States (U.S.) have important implications for tropospheric ozone (O3) and reactive oxidized nitrogen chemistry (NOy ≈ NOx + nitric acid (HNO3) + particle nitrate (pNO3) + peroxy nitrates (PNs) + alkyl nitrates (ANs)). Specifically, decreasing [NOx] concentrations have likely (1) increased the sensitivity of O3 to the [NOx] level, and (2) affected NOy speciation and partitioning. An understanding of the impacts of continued [NOx] reductions is needed to inform current and future air pollution control strategies, especially since the National …
Field Evaluation Of Portable Air Quality Monitors And Evaluation Of Short-Lived Plume Events Of Atmospheric Pollutants, Joseph Peter Marto
Field Evaluation Of Portable Air Quality Monitors And Evaluation Of Short-Lived Plume Events Of Atmospheric Pollutants, Joseph Peter Marto
Legacy Theses & Dissertations (2009 - 2024)
Availability of low cost optical sensors has allowed for the supplementation of existing air quality infrastructure with portable, adaptive monitors. While these sensors generally cannot offer the same accuracy and precision as established analysis methods, they can still reliably detect changes in pollutant concentration. This study evaluates the performance of two portable air quality enclosures deployed at collocated research sites to determine their accuracy and usefulness in field deployments. One system deployed collocated sensors for measurement of particulate matter mass concentration (Thermo pDR 1500 and TSI DustTrak DRX for PM2.5) and the second system deployed sensors for measurement of black …