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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)
Recent reports have suggested that production of superoxide or other reactive oxygen species by activated osteoclasts may play a role in the complex process of bone resorption; however, the enzyme responsible for production of superoxide by osteoclasts has not been characterized. To determine if osteoclasts express NADPH-oxidase, a superoxide-generating(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)
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