Major Ion Chemistry and Sensitivity to Acid Precipitation of Sierra Nevada Lakes

Major Ion Chemistry and Sensitivity to Acid Precipitation of Sierra Nevada Lakes Most alpine and subalpine lakes of the Sierra Nevada (California) are very dilute, weakly buffered calcium bicarbonate waters. Seventy‐three lakes selected to lie in basins representative of Sierran bedrocks were sampled in the summers of 1981 and 1982 and have a median alkalinity of 50 μeq 1−1 (range 5–1137) and a pH of 7 (range 5.7–9.4). The alkalinity of Sierran lakes cannot be predicted from altitude, basin area, or lake area. The concentrations of sulfate, calcium, or alkalinity in lake waters are positively correlated with the percent areal coverage of volcanic or calcareous rocks in the basins. The lakes are not acidified but are extremely sensitive to increases in acidity of atmospheric precipitation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Water Resources Research Wiley

Major Ion Chemistry and Sensitivity to Acid Precipitation of Sierra Nevada Lakes

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Publisher
Wiley
Copyright
Copyright © 1985 by the American Geophysical Union.
ISSN
0043-1397
eISSN
1944-7973
DOI
10.1029/WR021i001p00027
Publisher site
See Article on Publisher Site

Abstract

Most alpine and subalpine lakes of the Sierra Nevada (California) are very dilute, weakly buffered calcium bicarbonate waters. Seventy‐three lakes selected to lie in basins representative of Sierran bedrocks were sampled in the summers of 1981 and 1982 and have a median alkalinity of 50 μeq 1−1 (range 5–1137) and a pH of 7 (range 5.7–9.4). The alkalinity of Sierran lakes cannot be predicted from altitude, basin area, or lake area. The concentrations of sulfate, calcium, or alkalinity in lake waters are positively correlated with the percent areal coverage of volcanic or calcareous rocks in the basins. The lakes are not acidified but are extremely sensitive to increases in acidity of atmospheric precipitation.

Journal

Water Resources ResearchWiley

Published: Jan 1, 1985

References

  • Increasing hydrogen ion activity of water in two reservoirs supplying the San Francisco Bay Area, California
    McColl, McColl
  • Sensitivity and acidification of lakes in the Flat Tops Wilderness Area, Colorado
    Turk, Turk; Adams, Adams

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