Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Jill Grenon; Terry Svalberg; Ted Porwoll; Mark Story
    Date: 2010
    Source: Gen. Tech. Rep. RMRS-GTR-248. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 44 p.
    Publication Series: General Technical Report (GTR)
    Station: Rocky Mountain Research Station
    PDF: Download Publication  (1.0 MB)


    Air quality monitoring data from several programs in and around the Bridger-Teton (B-T) National Forest - National Atmospheric Deposition Program (NADP), longterm lake monitoring, long-term bulk precipitation monitoring (both snow and rain), and Interagency Monitoring of Protected Visual Environments (IMPROVE) - were analyzed in this report. Trends were analyzed using non-parametric tests and seasonality was taken into account when possible. Nitrate (NO3-) showed seasonal increasing trends in all sampled lake inlets, in atmospheric deposition at NADP sites and bulk sampling sites, and at two visibility sites. NADP sites showed consistent decreasing trends for both deposition and concentrations in SO42-, Na+, Mg2+, and Cl- and increasing trends in NH4+ and inorganic nitrogen deposition. Lake and bulk deposition chemistry data showed increasing trends in cations and decreasing trends in Cl-. Bulk deposition sites showed an increasing trend in NH4+. Standard Visual Range (SVR) showed an increasing trend and extinction showed a decreasing trend at all IMPROVE sites analyzed. In conclusion, considerations were listed regarding current and future air quality monitoring on the B-T National Forest.

    Publication Notes

    • You may send email to to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Grenon, Jill; Svalberg, Terry; Porwoll, Ted; Story, Mark. 2010. Lake and bulk sampling chemistry, NADP, and IMPROVE air quality data analysis on the Bridger-Teton National Forest (USFS Region 4). Gen. Tech. Rep. RMRS-GTR-248. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 44 p.


    Google Scholar


    Bridger-Teton National Forest, NADP, IMPROVE, long-term lake chemistry, bulk deposition, air quality trends, nitrogen deposition

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page