A field study of pollutant deposition in radiation fog
Deposition during fog episodes can make a significant contribution to the overall flux of pollutants in certain ecosystems. Furthermore, when atmospheric stagnation prevents normal ventilation in a region, fog deposition may become the main route of pollutant removal. Fogs can consequently exert dominant control over pollutant levels in certain atmospheres. The southern San Joaquin Valley (SJV) of California is a region prone to wintertime episodes of atmospheric stagnation. These lead to elevated pollutant concentrations and/or dense, widespread fogs. Major oil-recovery operations plus widespread agricultural and livestock feeding activities are important sources of SO/sub 2/, NO/sub X/ and NH/sub 3/ in the valley. A multifaceted program of field monitoring was conducted in the SJV during the winter 1984-1985, focusing on aspects of pollutant scavenging and removal in the fog-laden atmosphere. Concentrations of major species were measured in gas, dry aerosol and fogwater phases. In addition, depositional fluxes were monitored by surrogate-surface methods. These measurements were employed to directly assess the magnitude of removal enhancement by fog.
- Research Organization:
- Dept. of Environmental Engineering Science, California Institute of Technology, Pasadena, CA 91125
- OSTI ID:
- 5655256
- Journal Information:
- Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States), Vol. 31:2
- Country of Publication:
- United States
- Language:
- English
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ATMOSPHERIC CHEMISTRY
AMMONIA
AIR POLLUTION MONITORING
DEPOSITION
CALIFORNIA
AIR QUALITY
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SULFUR DIOXIDE
AEROSOLS
FOG
POLLUTANTS
PRECIPITATION SCAVENGING
ATMOSPHERIC PRECIPITATIONS
CHALCOGENIDES
CHEMISTRY
COLLOIDS
DISPERSIONS
ENVIRONMENTAL QUALITY
FEDERAL REGION IX
HYDRIDES
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OXIDES
OXYGEN COMPOUNDS
RAIN
SEPARATION PROCESSES
SOLS
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USA
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)