Explore Air

Visibility Assessments


Grand Canyon National Park, AZ
The Air Resources Division participates in and initiates studies that assess visibility conditions in national parks across the country. These assessments include enhanced field experiments and investigations of monitoring methods.

In enhanced field experiments, the ARD investigates in detail the specific sources of pollution contributing to visibility impairment in selected parks. These studies are conducted to obtain the necessary ambient air quality, meteorological, and pollutant emissions data to determine the causes of visibility impairment at a park or group of parks and, in some cases, to determine the contribution of specific sources to existing visibility impairment.

The ARD also frequently sponsors and conducts investigations of monitoring methods to improve ambient monitoring devices and analysis methods.

For more information on visibility assessments, please contact Bret Schichtel at (970) 491-8581.

updated on 09/18/2009  I   http://nature.nps.gov/air/Studies/visstudy.cfm   I  Email: Webmaster