Results from Yellowstone National Park Winter Air Quality Study: 2006-2007
Ray JD. 2007. Results from Yellowstone National Park Winter Air Quality Study: 2006-2007. JDR 6-27-2007. National Park Service, Air Resources Division. Denver, CO
The air quality at both the monitoring stations in Yellowstone National Park remained well below the national standards for carbon monoxide (CO) and particulate matter that was 2.5 micrometers or less in size (PM2.5). The winter of 2006-2007 had CO values that were nearly the same as the last few years. The maximum hourly CO at the West Entrance was slightly higher but the longer averages of 8-hours and for the season were down. The PM2.5 was close to values seen in the last three years. The CO and PM2.5 data at Old Faithful are harder to interpret because the winter vehicle parking and the monitoring station moved because of construction. The lower PM2.5 could be because the monitoring station is now farther from conflicting local sources. The CO concentrations are down slightly. This may be due to a different orientation of the monitoring station to the parking area or to a fewer number of vehicles parking near the temporary visitor center.
- Type
- Published Report
- Authors
- Ray, John
- Date of Issue
- 2007
- Publisher
- National Park Service, Air Resources Division
- Units
- YELL
- Keywords
- Air Quality, Emissions, Monitoring