Aloft layers were generally horizontal in structure. Mixed-layer average ozone concentrations were higher than surface concentrations. Obtain gridded mixing heights for these cells. Bin aloft data to match UAM output layers. Investigate spatial and temporal variability of the UAM output.
Review results with respect to meteorological conditions leading to the ozone episode.
Model predictions of ozone above about 200 m agl were typically about 50 to over 100 ppb lower than measured concentrations. Model predictions of NO x below about 400 m agl in the morning were both higher and lower than measured concentrations. Model predictions of NO x above 400 m agl in the midday and afternoon were typically lower than measured concentrations. Comparisons at domain boundary are important. An analysis of measured and predicted concentrations aloft of ozone and total reactive oxides of nitrogen in the eastern U.S. during July 1995.