||An assessment of atmospheric exposure and deposition to high elevation forests in the eastern United States /
Mohnen, Volker A. ;
Aneja, V. ;
Bailey, B. ;
Cowling, E. ;
Goltz, S. M.
||State Univ. of New York at Albany. Atmospheric Sciences Research Center. ;North Carolina State Univ. at Raleigh. ;Associated Weather Services, Albany, NY. ;Maine Univ. at Orono.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.
|| U.S. Environmental Protection Agency, Office of Research and Development,
Rain and rainfall--United States.
Chemical compounds ;
Quality assurance ;
Mountain Cloud Chemistry Project ;
Air pollution effects(Plants) ;
Eastern Region(United States) ;
Acid rain ;
Dry methods ;
Wet methods ;
High altitude environments ;
Environmental impact assessments ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||1 volume (various pagings)
The report summarizes the results of the four year field measurement and data analysis program of MCCP. The MCCP is sponsored by the U.S. Environmental Protection Agency as part of the joint U.S. Forest Service-EPA Spruce-Fir Research Cooperative. The objectives of the project have been met and the result is an assessment of principal atmospheric constituents as they impact the high elevation forests of the Eastern U.S. Deposition of SO4(-2), NO3(-), H(+), and NH(4+) in cloud water represents a significant input to forest canopies with elevations greater than 1000m. Cloud water deposition can exceed wet (rain) deposition and may be the dominant process for input of sulfate and nitrate compounds during the growing season in high elevation forests frequently exposed to clouds. Cloud water pH concentrations may be as much as 0.6pH units lower than pH in rain. SO(4+) and NO3(-) concentrations are also higher in cloud water than in precipitation. Ozone data reveals that significant differences exist between ozone concentrations at high elevation and low elevation sites. The primary effect of the difference is to produce higher mean ozone concentrations and longer episodes at the higher elevation sites.
Distributed to depository libraries in microfiche. "EPA 600/3-90-058." "September 1990." Includes bibliographical references (pages E-55-E-68, 13th group). Microfiche.