Comments on Ozone transport; beneficial or harmful?
Ozone Transport Scenario
Bullet #2: This is one scenario for high ozone concentrations; however, we haven't examined the population of episodes to determine its overall importance, or whether this type of occurrence is equally important in all regions of the OTAG domain. I suspect there are strong regional variations.
Second paragraph, second sentence: Upper Midwest I'm not sure this generalization can be applied to all areas in the Midwest. For example, in the Lake Michigan area, stagnation conditions are rare.
Mike, you are correct that the statement of ozone transport does not apply equally in all areas. Some regions will preferentially be the "receptor" of transported ozone and other regions will preferentially be the "source" of the transported ozone. This is due to spatially varying transport conditions and emission density. As stated in the summary report, the Central Midwest is home to frequent stagnation events and high emission densities making it a major source region. However, the Upper Midwest , including the Lake Michigan region, and New England have relatively low emission densities and few stagnation events making these regions good receptors of accumulated ozone in the source regions. In fact, the Upper Midwest is often the receptor of accumulated ozone in the Central Midwest region.
Second Paragraph, add after stagnationwith limited transport, and add after followed bylarge scale
However, it should be noted that stagnation does not mean no transport. Air masses still move during stagnation and transport still takes place, just on a more limited scale.
