| Main Title |
Analysis of Crop Loss for Alternative Ozone Exposure Indices. |
| Author |
Tingey, D. T. ;
Hogsett, W. E. ;
Lee, E. H. ;
|
| CORP Author |
Corvallis Environmental Research Lab., OR. ;Northrop Services, Inc., Corvallis, OR. |
| Year Published |
1988 |
| Report Number |
EPA/600/D-88/118; |
| Stock Number |
PB88-214788 |
| Additional Subjects |
Ozone ;
Air pollution ;
Farm crops ;
Plant growth ;
Mathematical models ;
Exposure ;
Concentration(Composition) ;
Response ;
Seasonal variations ;
Plant physiology ;
Air pollution effects(Plants)
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB88-214788 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
15p |
| Abstract |
Defining the appropriate exposure index that 'best' relates plant response to exposure necessitates a consideration of the underlying biological basis for the response and a method for characterizing the temporal variations in pollutant occurrence. Although no single index was deemed 'best' (in all cases) for relating O(3) exposure to plant response, the top-performing exposure indices were those that (1) cumulate the hourly O(3) concentrations over time, (2) emphasize concentrations of 0.06 ppm and higher either by continuous sigmoid weights or by discrete (0 or 1) weights of the threshold indices. The 'best' index gave greater weight to exposures occurring 20 to 40 days before harvest. When assessing the impact of O(3) on plant growth, these findings illustrate the importance of exposure duration, the importance of repeated peaks, and the time of increased plant sensitivity. |
| Supplementary Notes |
See also PB86-121548. Prepared in cooperation with Northrop Services, Inc., Corvallis, OR. |
| NTIS Title Notes |
Symposium paper. |
| PUB Date Free Form |
May 88 |
| Category Codes |
68A; 98D |
| NTIS Prices |
PC A03/MF A01 |
| Primary Description |
600/02 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
824517982 |
| Origin |
NTIS |
| Type |
CAT |
