Science Inventory

Application of Wavelet Filters in an Evaluation of Photochemical Model Performance

Citation:

Porter, S., C. Hogrefe, E. Gego, K. FOLEY, J. M. GODOWITCH, AND S. T. RAO. Application of Wavelet Filters in an Evaluation of Photochemical Model Performance. Chapter 4, Air Pollution Modeling and its Applications XX. Springer Netherlands, , Netherlands, 4.17(C):415-420, (2010).

Impact/Purpose:

The National Exposure Research Laboratory′s (NERL′s) Atmospheric Modeling and Analysis Division (AMAD) conducts research in support of EPA′s mission to protect human health and the environment. AMAD′s research program is engaged in developing and evaluating predictive atmospheric models on all spatial and temporal scales for forecasting the Nation′s air quality and for assessing changes in air quality and air pollutant exposures, as affected by changes in ecosystem management and regulatory decisions. AMAD is responsible for providing a sound scientific and technical basis for regulatory policies based on air quality models to improve ambient air quality. The models developed by AMAD are being used by EPA, NOAA, and the air pollution community in understanding and forecasting not only the magnitude of the air pollution problem, but also in developing emission control policies and regulations for air quality improvements.

Description:

Air quality model evaluation can be enhanced with time-scale specific comparisons of outputs and observations. For example, high-frequency (hours to one day) time scale information in observed ozone is not well captured by deterministic models and its incorporation into model performance metrics lead one to devote resources to stochastic variations in model outputs. In this analysis, observations are compared with model outputs at seasonal, weekly, diurnal and intra-day time scales. Filters provide frequency specific information that can be used to compare the strength (amplitude) and timing (phase) of observations and model estimates.

URLs/Downloads:

4.17 Application of Wavelet Filters in an Evaluation of Photochemical Model Performance   (PDF,NA pp, 934 KB,  about PDF)

Record Details:

Record Type: DOCUMENT (BOOK CHAPTER)
Product Published Date: 01/10/2010
Record Last Revised: 06/04/2010
OMB Category: Other
Record ID: 211564

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL EXPOSURE RESEARCH LABORATORY

ATMOSPHERIC MODELING AND ANALYSIS DIVISION

EMISSIONS AND MODEL EVALUATION BRANCH