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Chemical Characteristics of Wet and Dry Atmospheric Fallout in Northern California
Author(s) -
Mc Coll John G.,
Monette Larry K.,
Bush Douglas S.
Publication year - 1982
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1982.00472425001100040007x
Subject(s) - environmental science , atmospheric sciences , dry season , environmental chemistry , chemistry , hydrology (agriculture) , ecology , geology , biology , geotechnical engineering
Wet and dry atmospheric fallout were monitored on an event basis at eight locations during the wet season, November 1978–May 1979. Nine different ionic species, plus conductivity and volume, were determined. Wet fallout was commonly acid (pH < 5.6) at all sites, although there was considerable variation between sites, and temporal variation within sites. At most sites H + was highly correlated with NO 3 − but not with SO 4 2− , and NO 3 − /SO 4 2− equivalent ratios exceeded 1.0, indicating that HNO 3 was predominant and H 2 SO 4 secondary. Dry fallout comprises a large proportion of total atmospheric fallout.