High ozone concentration may cause some damage to human health and vegetation. In Texas, there are four urban areas, Houston-Galveston, Dallas-Fort Worth, Beauont-Port Arthur, Ell Paso, do not meet federal standard for ozone. Isn’t it interesting to understand why and how this happens?

The objective of the project is to understand the behavior of ozone in Texas by analyzing various ozone data sets collected from air monitoring sites (stations). A number Matlab programs has been developed for this purpose. Provided the input data of ozone concentration from various stations, the Matlab program would extract and list exceedances and transient high ozone events (THOEs) with the dates, times and ozone concentration values. It would also calculate means, standard deviations, replace the missing data and locate the missing data. The program could also select smaller ranges of input data for more detailed and in-depth analysis such as weekday, weekend event, or any special events.
These following two figures are examples of the results that could be shown using the Matlab program.

The first figure show the ozone concentration of a four-month time series with missing data and the last figure is the same graph but with the missing data replaced by the Matlab program.