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Influence of relative humidity on aerosol deposition by sedimentation
Abstract The deposition of particulate matter at the ground due to settlement of particles in the atmosphere increases greatly with increasing relative humidity (r.h.) when the r.h. becomes larger than 90 per cent. In fog, i.e. at r.h. of 99.9 percent, the flux of dry particulate material to the ground due to settling is about 15–25 times larger than at zero and moderate r.h. Thus, episodes of fog are very effective in removing particulate matter from the atmosphere. Secondly, mean deposition velocities of metals at Frankfurt, F.R. Germany, have been compared with the appropriate mean settling velocities. The results show the mean turbulent flux of material from the ground to the atmosphere to be smaller, but of the same order as the settling flux.
Influence of relative humidity on aerosol deposition by sedimentation
Abstract The deposition of particulate matter at the ground due to settlement of particles in the atmosphere increases greatly with increasing relative humidity (r.h.) when the r.h. becomes larger than 90 per cent. In fog, i.e. at r.h. of 99.9 percent, the flux of dry particulate material to the ground due to settling is about 15–25 times larger than at zero and moderate r.h. Thus, episodes of fog are very effective in removing particulate matter from the atmosphere. Secondly, mean deposition velocities of metals at Frankfurt, F.R. Germany, have been compared with the appropriate mean settling velocities. The results show the mean turbulent flux of material from the ground to the atmosphere to be smaller, but of the same order as the settling flux.
Influence of relative humidity on aerosol deposition by sedimentation
Hänel, Gottfried (author)
Atmospheric Environment ; 16 ; 2703-2706
1982-01-29
4 pages
Article (Journal)
Electronic Resource
English
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