| Main Title |
Diurnal and Seasonal Patterns of Particulate Sulfur and Sulfuric Acid in St. Louis, July 1977-June 1978. |
| Author |
Cobourn, W. Geoffrey ;
Husar, Rudolf B. ;
|
| CORP Author |
Washington Univ., St. Louis, MO.;Environmental Sciences Research Lab., Research Triangle Park, NC. |
| Year Published |
1982 |
| Report Number |
EPA-R-806606; EPA-600-J-82-339; |
| Stock Number |
PB83-231431 |
| Additional Subjects |
Sulfur ;
Sulfuric acid ;
Particles ;
Air pollution ;
Diurnal variations ;
Seasonal variations ;
Light scattering ;
Concentration(Composition) ;
Missouri ;
Transport properties ;
Reprints ;
Saint Louis(Missouri)
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB83-231431 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
12p |
| Abstract |
Continuous measurements of particulate sulfur and sulfuric acid were taken in St. Louis over a one year period using the in-situ thermal analysis-flame photometric method. These measurements were used to calculate average diurnal patterns for each quarter of the year, and also the seasonal pattern for one year. Enhanced formation of particulate sulfur during the daytime hours of spring and summer is indicated by an afternoon concentration increase of about 20%. The diurnal patterns of aerosol acidity and charge (a bulk measure of 0.01-0.1 micrometers particles) also support the notion. Particulate sulfur and light scattering coefficient exhibited moderate seasonal variation. For the third quarter, particulate sulfur concentration was higher than the annual mean by 40% and light scattering coefficient was higher by 25%. |
