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A solar powered, aerochemetric rain sampler and rain gauge collect precipitation and dry atmospheric deposition data at Emerald Lake in Sequoia National Park.
© NPS photo
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High-elevation lakes and streams in
the parks are potentially sensitive to human-induced
acid deposition (acidic rain, snow, and particles).
While chronic acidification is not a problem at
present, there are episodes when the capacity of our
lakes and streams to neutralize acids gets reduced --
during snowmelt and during the "dirty"
rainstorms of summer and early fall -- and the water
becomes acidic for a time. If acid deposition
increases in the future, a likely scenario given the
tremendous population growth in the San Joaquin
Valley, these episodes of acidification will become
more frequent and can be expected to alter our
aquatic communities.
Acidic Deposition Links
SEKI
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