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OLS Field Name OLS Field Data
Main Title Resampling and Extreme Value Statistics in Air Quality Model Performance Evaluation.
Author Rao, S. T. ; Sistla, G. ; Pagnotti, V. ; Petersen, W. B. ; Irwin, J. S. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab. ;New York State Dept. of Environmental Conservation, Albany.
Year Published 1985
Stock Number PB87-193629
Additional Subjects Air pollution ; Models ; Data processing ; Performance evaluation ; Value ; Hypotheses ; Statistical analysis ; Data sampling ; Reprints ; Air quality
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NTIS  PB87-193629 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 18p
Abstract Specific data analysis techniques that will reveal the performance of air quality models in simulating the measured concentrations' cumulative distribution are discussed. The paper presents two types of analysis to compare model predictions with the measurements. In one analysis, extreme value statistics and the fitting of tail exponential distributions to both measured and predicted values are used in various ways to see if the measured and predicted values fit such distributions and to what degree the higher values of the cumulative frequency distributions coincide. In the second analysis, a resampling (bootstrap technique is used to develop non-parametric confidence intervals for the entire cumulative distribution of the measured concentrations, and to derive empirical distributions for central tendency statistics and for differences between measured and predicted mean and median values. The analysis is focused so as to show (1) why the resampling is necessary and the degree to which mistaken judgments can be made with and without the technique, and (2) comparisons between the discriminating capabilities of 'tail fit' type model evaluation and one using the resampling technique. It is shown that both the bootstrap and extreme value statistics are needed to quantify the uncertainty associated with the model predictions. (Copyright (c) Atmospheric Environment Vol. 19 No. 9, pp. 1503-1518, 1985.)
Supplementary Notes Pub. in Atmospheric Environment,v19 n9 p1503-1518 1985. Prepared in cooperation with New York State Dept. of Environmental Conservation, Albany.
NTIS Title Notes Journal article.
Title Annotations Reprint: Resampling and Extreme Value Statistics in Air Quality Model Performance Evaluation.
PUB Date Free Form c1985
Category Codes 68A
NTIS Prices PC A02/MF A01
Primary Description 600/09
Document Type NT
Cataloging Source NTIS/MT
Control Number 723224267
Origin NTIS
Type CAT