The major role of dust in explaining 1954--1993 acid rain trends
Conference
·
OSTI ID:271838
- Illinois State Water Survey, Champaign, IL (United States). Atmospheric Sciences Div.
Calcium and other base cation levels in air and precipitation from the 1950`s to the 1990`s can be as important as sulfate and other acidic species in understanding acid rain trends (or basic rain trends). Precipitation quality data, air quality data, and estimates of sources of dust emissions are used to address the issue of calcium trends in the atmosphere. The apparent downward trend for calcium in precipitation from the 1950`s to the 1970`s is suggested to be due mainly to a change in sample collection methods while the decrease since the mid-1970`s is due to a real decrease in atmospheric calcium dust levels in the atmosphere.
- OSTI ID:
- 271838
- Report Number(s):
- CONF-950196--
- Country of Publication:
- United States
- Language:
- English
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