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Parametric study of wind generated super-μm particle effects in large fires
Abstract A numerical study is presented of the effects of super-μm particles mechanically generated by large fires on coagulation loss of sub-μm aerosols in the smoke plumes. This study shows that inclusion of the source generation of large particles in the model can reduce the contribution to the optical depth of sub-μm particles by a factor of two at visible wavelengths. This assumes a combination of high turbulence and high super-μm concentrations. Since no measurements of super-μm concentrations in large firestorms have been made, a concentration corresponding to values found in medium sized dust devils was assumed. This study also shows that the early-time optical effect of the super-μm particles can be considerable in both visible and infrared wavelengths.
Parametric study of wind generated super-μm particle effects in large fires
Abstract A numerical study is presented of the effects of super-μm particles mechanically generated by large fires on coagulation loss of sub-μm aerosols in the smoke plumes. This study shows that inclusion of the source generation of large particles in the model can reduce the contribution to the optical depth of sub-μm particles by a factor of two at visible wavelengths. This assumes a combination of high turbulence and high super-μm concentrations. Since no measurements of super-μm concentrations in large firestorms have been made, a concentration corresponding to values found in medium sized dust devils was assumed. This study also shows that the early-time optical effect of the super-μm particles can be considerable in both visible and infrared wavelengths.
Parametric study of wind generated super-μm particle effects in large fires
Porch, William M. (author) / Penner, Joyce E. (author) / Gillette, Dale A. (author)
Atmospheric Environment ; 20 ; 919-929
1985-09-12
11 pages
Article (Journal)
Electronic Resource
English
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