Main Title |
Statistical Methodology for Exploring Elevational Differences in Precipitation Chemistry. |
Author |
Warren, W. G. ;
Boehm, M. ;
Link., D. ;
|
CORP Author |
Environmental Protection Agency, Denver, CO. Region VIII. ;Oregon State Univ., Corvallis. Dept. of Forest Management. ;NSI Technology Services Corp., Corvallis, OR. Environmental Research Lab. |
Publisher |
c1992 |
Year Published |
1992 |
Report Number |
EPA/600/J-92/036; |
Stock Number |
PB92-144088 |
Additional Subjects |
Precipitation(Meteorology) ;
Statistical analysis ;
Atmospheric chemistry ;
Air pollution ;
Study estimates ;
Concentration(Composition) ;
Elevation ;
Techniques ;
Sulfates ;
Snow ;
Rain ;
Reprints ;
National Atmospheric Deposition Program ;
National Trends Network
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB92-144088 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
12p |
Abstract |
A statistical methodology for exploring the relationships between elevation and precipitation chemistry is outlined and illustrated. The methodology utilizes maximum likelihood estimates and likelihood ratio tests with contour ellipses of assumed bivariate lognormal distributions used to assist in interpretation. The approach was illustrated using 12 NADP/NTN sites located in six study areas in the Wyoming and Colorado Rockies. These sites are part of the Rocky Mountain Deposition Monitoring Project (RMDMP), which was initiated in 1986 to investigate the relationships between elevation and the chemistry of precipitation. The results indicate differences in sulfate concentrations between airsheds, between snow and rain, and between higher and lower elevations. In general, sulfate concentrations in snow are greater at lower elevations and this difference is independent of concentration. A similar relationship for rain was not well established. In addition there is evidence that, overall, the sulfate concentrations differed between the six study areas, although pairwise differences were not always significant. |
Supplementary Notes |
Pub. in Atmospheric Environment, v26A n1 p159-169 1992. Prepared in cooperation with Oregon State Univ., Corvallis. Dept. of Forest Management, and NSI Technology Services Corp., Corvallis, OR. Environmental Research Lab. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Statistical Methodology for Exploring Elevational Differences in Precipitation Chemistry. |
Category Codes |
68A; 55E |
NTIS Prices |
PC A03/MF A01 |
Primary Description |
600/02 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
209921735 |
Origin |
NTIS |
Type |
CAT |