||Co-Occurrence of Ozone and Acidic Cloudwater in High-Elevation Forests.
Vong, R. J. ;
Guttorp., P. ;
||Oregon State Univ., Corvallis. Dept. of Atmospheric Sciences. ;Washington Univ., Seattle. Dept. of Statistics.;Corvallis Environmental Research Lab., OR.
Air pollution effects(Plants) ;
Acid rain ;
High altitude environments ;
Biological effects ;
Eastern Region(United States)
||Some EPA libraries have a fiche copy filed under the call number shown.
A chemical climatology for high-elevation forests was estimated from ozone and cloudwater acidity data collected in the eastern United States. Besides frequent ozone-only and pH-only single-pollutant episodes, both simultaneous and sequential co-occurrence of ozone and acidic cloudwater were observed a few times each month above cloud base. Co-occurrence was observed more frequently at two southern sites than at two northern sites. This co-occurrence represents a multiple chemical stress whose biological implications can now for the first time be studied in controlled exposures of trees. (Copyright (c) 1991 American Chemical Society.)