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Effects of relative humidity gradients on the evaluation of submicron aerosol flux measurements in the atmospheric surface layer

Author
DePaul, F. T.
Published
United States : [publisher not identified], 1985
Springfield, Va.: National Technical Information Service, [approximately 1985]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Sisterson, D. L. and Wesely, M. L.

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Summary
This study investigates the influence of humidity gradients on submicron particle fluxes and the resulting deposition velocities estimated from a micrometeorological, aerodynamic technique. The effects of relative humidity causing condensational growth and evaporative shrinkage of submicron particles and then significantly altering deposition velocities, estimated by applying an aerodynamic computational scheme to values of particle concentrations measured at heights of 1.0 and 8.5 m above a grass surface, appear negligible when relative humidities at the measurement heights are less than 98%. Also, the effects of surface wetness to increase the deposition velocities appear insignificant. Deposition velocities for the larger size cut are rarely significantly different from zero. The very fine particles have deposition velocities that are positive most of the time, and peak during the afternoon. 12 refs., 3 tabs.
Report Numbers
DE85010510; CONF-850406-4
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: W-31-109-ENG-38
OSTI Identifier 5865016
Research organization: Argonne National Lab., IL (USA).
View MARC record | catkey: 47353182