Science Inventory

Comparative Evaluation of the Impact of WRF-NMM and WRF-ARW Meteorology on CMAQ Simulations for O3 and Related Species During the 2006 TexAQS/GoMACCS Campaign

Citation:

YU, S., R. MATHUR, J. E. PLEIM, G. POULIOT, D. C. WONG, B. K. EDER, K. L. SCHERE, R. C. GILLIAM, AND S. T. RAO. Comparative Evaluation of the Impact of WRF-NMM and WRF-ARW Meteorology on CMAQ Simulations for O3 and Related Species During the 2006 TexAQS/GoMACCS Campaign . Atmospheric Pollution Research. Turkish National Committee for Air Pollution Research and Control, Izmir, Turkey, 3(2):149-162, (2012).

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:

In this paper, impact of meteorology derived from the Weather, Research and Forecasting (WRF)– Non–hydrostatic Mesoscale Model (NMM) and WRF–Advanced Research WRF (ARW) meteorological models on the Community Multiscale Air Quality (CMAQ) simulations for ozone and its related precursors has been comparatively evaluated over the eastern United States using surface network (AIRNow) data and over the Texas area with the intensive observations obtained by NOAA aircraft P–3 flights and ship during the 2006 TexAQS/GoMACCS campaign. The NMM–CMAQ and ARW–CMAQ models were run on the basis of their original grid structures of the meteorological models. The results at the AIRNow surface sites showed that the model performance for ARW–CMAQ and NMM–CMAQ models was similar and reasonable for the high maximum 8–hr O3 concentration range (>40 ppbv) with slightly better performance for ARW–CMAQ [the normalized mean bias (NMB) values of ARW–CMAQ and NMM–CMAQ are 8.1 and 9.4%, respectively]. The results of the evaluation using aircraft observations over the Houston–Galveston–Brazoria and Dallas metropolitan areas revealed that both models had similar performances for different chemical species (O3, CO, PAN, NO2, NO, NOX, HNO3, NOY and ethylene) as both models use the same chemical mechanism and emissions. Both models reproduced the vertical variation patterns of the observed air temperature and water vapor well with the slightly lower values for the ARW–CMAQ model. The evaluation results with ship observations over the Gulf of Mexico showed that both models captured, with a good deal of accuracy, the temporal variations and broad synoptic change seen in the observed O3, NOY, CO and O3+NO2 with the mean NMB value <25% most of the time.

URLs/Downloads:

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Comparative Evaluation of the Impact of WRF-NMM and WRF-ARW Meteorology on CMAQ Simulations FOR O3 and Related Species During the 2006 TexAQS/GoMACCS Campaign   (PDF,NA pp, 748 KB,  about PDF)

Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Product Published Date: 04/01/2012
Record Last Revised: 07/20/2012
OMB Category: Other
Record ID: 234808

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL EXPOSURE RESEARCH LABORATORY

ATMOSPHERIC MODELING AND ANALYSIS DIVISION

ATMOSPHERIC MODEL DEVELOPMENT BRANCH