Dynamic chemical characterization of montane clouds

Autor: Ralph E. Baumgardner, Viney P. Aneja, Richard J. Paur, Candis Claiborn, Ronald L. Bradow
Rok vydání: 1990
Předmět:
Zdroj: Atmospheric Environment. Part A. General Topics. 24:563-572
ISSN: 0960-1686
Popis: Cloud water collections have been made on Mt. Mitchell using a nearly real-time cloud and rain acidity/conductivity (CRAC) analyzer. Results are reported for integrating times of approximately 5 min during several cloud events in the summer and fall of 1987. Both pH and ionic strength during cloud events were found to be much more variable than previously indicated by cloud collection. Maximum values of H + and SO 4 2− ion concentrations in 5-min samples were as much as 2.5 times greater than those measured in 1-h integrated collections. These results are not influenced by instrumental variability to any measurable extent. Results from repeated quality control samples were highly reproducible, and agreement between integrated collection data and the average values of 5-min sequential samples was also very good.
Databáze: OpenAIRE