| Main Title |
Characteristics of Particulate Patterns, 1957-1966. |
| Author |
Spirta, Robert ;
Levi, Howard J. ;
|
| CORP Author |
National Air Pollution Control Administration, Raleigh, N.C. |
| Year Published |
1970 |
| Report Number |
NAPCA-Pub-AP-61; |
| Stock Number |
PB-192 223 |
| Additional Subjects |
( Air pollution ;
Particles) ;
( Dust ;
Air pollution) ;
Periodic variations ;
Urban areas ;
Rural areas ;
Sampling ;
Meteorological parameters ;
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB-192 223 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
105p |
| Abstract |
The National Air Surveillance Networks (NASN) have collected samples of suspended particulate matter since 1957. The resulting suspended particulate data are graphically summarized by the application of Whittaker-Henderson Type A curve-smoothing formulas to 10 years of data. Data from 60 urban stations and 20 nonurban stations were studied by this technique, which brings out the underlying cyclical patterns and long-term trends in nationwide levels of suspended particulate matter. Seasonal patterns are evident for many urban and nonurban stations, and the seasonal characteristics of the two types of stations contrast sharply. Long-term trends are downward at many center-city urban sites, but are upward at some nonurban sites. (Author) |
