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4tmospherwEmtronmentVol 26A No 11 pp 2001 2017 1992 0004 6981 92 $500+000 Pnnted in Great Britain ( 1992 Pergamon Press Ltd
 

Summary: 4tmospherwEmtronmentVol 26A No 11 pp 2001 2017 1992 0004 6981 92 $500+000
Pnnted in Great Britain ( 1992 Pergamon Press Ltd
REGIONAL ANALYSIS OF CLOUD CHEMISTRY AT HIGH
ELEVATIONS IN THE EASTERN UNITED STATES
ZHENG LI and VINEY P ANEJA
Department of Marine. Earth and Atmospheric Scmnces. North Carohna State Umverslty Raleigh
NC 27695-8208 U S A
(First received 15 February 1991 and m final form 13 January 1992)
Abstract--Results from the collection and chemical analysis of cloudwater samples collected from May to
October 1986-1988 from the five high-elevation ( >950m MSL) Mountain Cloud Chemistry Program
(MCCP) sites (Whiteface Mountain, NY, Mt Moosdauke, NH, Shenandoah Park, VA, Whitetop Mountain,
VA, Mt Mitchell, NC) in the eastern United States are summarized The resulting database documents the
regional chemical climatology of high-elevation forest ecosystems in the eastern U S Clouds occurred at
these sites on 32-77% of the days during the sample collection period More than 90% of cloud samples
were acidic (pH < 5 0) The lowest cloudwater pH (2 29 integrated 1-h collection penod) was recorded at Mt
Mitchell, NC At all sites sulfate and nitrate were the dominant anions and hydrogen and ammonium were
the dominant cations in cloudwater samples Mount Mitchell recewed the most acidic clouds and highest
chemical exposures, while the Whiteface summit site received the least acidic and lowest chemical exposures
compared to other MCCP high-elevation sites Cloud pH and major chemical components exhibited a
seasonal trend with the maxima during the summer months, and correlated well with temperature and

  

Source: Aneja, Viney P. - Department of Marine, Earth and Atmospheric Sciences, North Carolina State University

 

Collections: Environmental Sciences and Ecology; Geosciences