Sentence examples for maximum ozone levels from inspiring English sources

The impact of temperature on daily maximum ozone levels was confirmed by deducing the model from basic principles.

Furthermore, the accuracy of the results and the performance of the two models suggest that temperature explains a large proportion of variance in the daily maximum ozone levels.

In this paper, the performances of different forecasting systems are compared using the daily maximum ozone levels across three locations in Kuwait.

The two analytical tools used in this study to forecast daily maximum ozone levels are time series modeling and fuzzy modeling.

By 2100, much of the Northern Hemisphere was projected to have annual mean maximum ozone levels of 60 ppb, as were most of the populated areas of the Southern Hemisphere (Anderson et al. 2001).

Ozone exposure was treated as a dichotomous variable, where subjects were assigned to the high-exposure group if they lived for 4 or more years in a U.S. county with 10-year average summer-season daily 1-hr maximum ozone levels [greater/equal to] 80 ppb.

For both methods, we assume a constant background 8-hr daily maximum ozone level of 40 ppb, representing the amount of ozone (for this averaging period) that is not attributable to U.S. anthropogenic sources.

PM10 was a significant predictor of mortality when controlling for gaseous air pollutants, with effect sizes ranging from a 0.45% increase per 10 mincrementincrement of PM10 [95% confidence interval (CI), 0.12-0.79%] when matched on maximum hourly ozone levels, to a 0.81% increase per 10 mincrementincrement of PM10 (95% CI, 0.47-1.16%) when matched on 24-hr average SO2.

Both methodologies conclude that seasonal mean daily 8-h maximum U.S. background ozone levels can be as high as 40 45 ppb over rural portions of the western U.S. Background fractions tend to decrease as modeled total ozone concentrations increase, with typical fractions of 75 100percentt on the lowest ozone days (<25 ppb) and typical fractions between 30 and 50% on days with ozone above 75 ppb.

Using the mean value theorem for integrals on the right hand side of equation (5) and dropping the "max" superscript for daily maximum ozone and temperature levels, the theoretical model reduces to: O 3, t + 1 = α O 3, t + β T t + 1 + γ T t + δ (6).

The variables extracted included: daily mean temperature; daily maximum temperature; daily minimum temperature; daily mean levels of nitrogen oxides (NOx); and daytime maximum 8-hour mean ozone levels.