Potential contribution of sulfate production in cumulus-cloud droplets to ground-level particle-sulfur concentrations

Technical Report · Thu Jan 01 04:00:00 EST 1987

OSTI ID:5609245

Altshuller, A P

Relationships were examined between the presence or absence of cumulus clouds and 3rd-quarter fine-particle sulfur concentrations in St. Louis. An association between the presence of cumulus clouds with SO/sub 2/ conversions in droplets and incrementally higher fine-particle sulfur concentrations can be demonstrated. However, diurnal patterns of fine-particle sulfur concentrations in the presence of cumulus clouds are not consistent with local contributions from sulfate formation in cumulus clouds. Morning fog often occurs on the same days on which cumulus clouds form later. Reactions of SO/sub 2/ in fog droplets appear to make a contribution, but do not account for the major part of the increments in fine-particle-sulfur concentrations associated with cumulus clouds.

• Research Organization: Environmental Protection Agency, Research Triangle Park, NC (USA). Atmospheric Sciences Research Lab.
• OSTI ID: 5609245
• Report Number(s): PB-88-125554/XAB; EPA-600/J-87/076
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACID RAIN
AEROSOLS
AIR POLLUTION
ATMOSPHERIC PRECIPITATIONS
CHALCOGENIDES
CHEMICAL REACTIONS
CLOUDS
COLLOIDS
DISPERSIONS
DROPLETS
FOG
NAPAP
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PHOTOCHEMICAL REACTIONS
POLLUTION
RAIN
SOLS
SULFATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES