Winter Air Quality in Yellowstone National Park 2005-2006
Ray JD. 2007. Winter Air Quality in Yellowstone National Park 2005-2006. NPS/ARD-2007/D-1207. National Park Service, Air Resources Division. Denver, CO
Executive Summary: The air quality in Yellowstone National Park was monitored at two locations as part of the adaptive management program on the use of over-snow winter motor vehicles. The leading indicators used were ambient concentrations of carbon monoxide (CO) and particulate matter of 2.5 micrometers or less (PM 2.5). Emission measurements 10,11 in the last two years have indicated that snowmobiles and snow coaches may have approximately equal contributions to the concentrations of CO.10, 11, 12 Detailed entry counts of each type of vehicle at the west entrance were used in the analysis.8 The West Entrance near the town of West Yellowstone, MT is the primary indicator for overall air quality and the relationship to traffic, because detailed entry counts could be obtained at that site. Old Faithful is a destination for most of the winter use vehicles; they are present mid-day and that area represents the highest density of winter vehicles.
- Type
- Published Report
- Authors
- Ray, John
- Date of Issue
- 2007-01
- Publisher
- National Park Service, Air Resources Division
- Units
- YELL
- Keywords
- Air Quality, Emissions, Monitoring, Pollutants, Snowmobiles