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Predictions of nitrous acid from the Community Multiscale Air Quality modeling system are compared with the measurements from the 2001 Northeast Oxidant and Particle Study. Four different sources of nitrous acid were considered in the study: gas-phase reactions, direct emissions, a heterogeneous reaction, and a surface photolysis reaction. When only… (More)
An operational model evaluation procedure is described to quantitatively assess the relative skill among several regional-scale air quality models simulating various percentiles of the cumulative frequency distribution of observed daily maximum 8-h ozone concentrations. Bootstrap sampling is used to characterize the variability in the observed percentile… (More)
The Grand Round was held at the Christie Hospital on the 26 November 2001. It followed a talk by Professor Kate Vallis of the Princess Margaret Hospital in Toronto on, "A functional genomics approach to understanding normal issue response and ionizing radiation".