| Main Title |
On the Proportionality of Fine Mass Concentration and Extinction Coefficient for Bimodal Size Distributions. |
| Author |
Lewis, Charles W. ;
|
| CORP Author |
Environmental Sciences Research Lab., Research Triangle Park, NC. |
| Year Published |
1981 |
| Report Number |
EPA-600/J-81-125; |
| Stock Number |
PB82-207770 |
| Additional Subjects |
Light transmission ;
Aerosols ;
Particle size ;
Light scattering ;
Concentration(Composition) ;
Arid land ;
Visibility ;
Air pollution ;
Reprints ;
Air quality ;
Extinction coefficients ;
Atmospheric transmissivity
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB82-207770 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
10p |
| Abstract |
For a bimodal size distribution of ambient aerosol, an upper limit in particle size can be chosen for the fine aerosol fraction so that the extinction coefficient for light scattering and absorption is directly proportional to the fine mass concentration, with no dependence on the coarse mass concentration. With the size parameters of the modes taken to be 'grand average continental' values of Whitby, the upper size limit is 3.4 micrometers (aerodynamic diameter). Consequently, the extinction coefficient could be inferred from a measurement of the fine mass concentration only, even in arid regions where coarse aerosol concentrations usually far exceed the fine. |
| Supplementary Notes |
Pub. in Atmospheric Environment, v15 n12 p2639-2646 1981. |
| NTIS Title Notes |
Journal article. |
| Title Annotations |
Reprint: On the Proportionality of Fine Mass Concentration and Extinction Coefficient for Bimodal Size Distributions. |
| PUB Date Free Form |
1981 |
| Category Codes |
4A; 55E; 68A |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/09 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
323815216 |
| Origin |
NTIS |
| Type |
CAT |
