Release of 2014 Uinta Basin Winter Ozone Study (UBWOS 2014) Report

Lab Note #27
Mar 05, 2015

The final report has been released and is available on-line. I will briefly summarize it here.

While ground-level ozone exceedances (higher ozone concentrations than the 75 ppbv limit set by the EPA) did occur, they were not as frequent or as large as during the 2013 campaign. The highest ozone events were during December 2013, before the field campaign began. The ozone "events" were associated with snow cover, and did not occur after the snow melted in February. The observations made during the field campaign suggest that wintertime ozone in this region is sensitive to both nitrogen oxides (NOx) and volatile carbon compounds (VOCs), and that reductions in NOx only or both NOx and VOC emissions would serve to reduce ground-level ozone.

The full report is here:

The executive summary is here:

Thank you for your support of our participation in this study!

Although the "final" report is out, our work is not yet done. Although our measurements are done and give some qualitative information that is contained in the full report, we still need to complete our model calculations in order to provide more quantitative estimates of the recycling of NOx through the snowpack, which may influence the effectiveness of reductions in NOx emissions to the atmosphere as proposed in the report. As you know we have been busy translating our computer model to the Python coding language. This has been completed, and we are actively testing this model to make sure there are no "bugs" resulting from the translation.

How will you know when we are done? Well, I will tell you! But also, and most importantly, we will have published our results in a peer-reviewed journal. We plan to publish in an open-access journal so all of you will have free access to it.

Please wait...