Results 21 to 30 of about 1,908 (162)

Retrospective Air Quality Simulations of the TexAQS-II: Focused on Emissions Uncertainty

open access: yesAsian Journal of Atmospheric Environment, 2014
There are several studies on the effects of emissions of highly reactive volatile organic compounds (HRVOC) from the industrial sources in the Houston- Galveston-Brazoria (HGB) area on the high ozone events during the Texas Air Quality Study (TexAQS) in ...
DaeGyun Lee   +3 more
doaj   +1 more source

A comparative study of two-way and offline coupled WRF v3.4 and CMAQ v5.0.2 over the contiguous US: performance evaluation and impacts of chemistry–meteorology feedbacks on air quality [PDF]

open access: yesGeoscientific Model Development, 2021
The two-way coupled Weather Research and Forecasting and Community Multiscale Air Quality (WRF-CMAQ) model has been developed to more realistically represent the atmosphere by accounting for complex chemistry–meteorology feedbacks.
K. Wang   +7 more
doaj   +1 more source

Aerosol indirect effect on the grid-scale clouds in the two-way coupled WRF–CMAQ: model description, development, evaluation and regional analysis [PDF]

open access: yesAtmospheric Chemistry and Physics, 2014
This study implemented first, second and glaciation aerosol indirect effects (AIE) on resolved clouds in the two-way coupled Weather Research and Forecasting Community Multiscale Air Quality (WRF–CMAQ) modeling system by including parameterizations for ...
S. Yu   +7 more
doaj   +1 more source

Comparison between Atmospheric Chemistry Model and Observations Utilizing the RAQMS-CMAQ Linkage, Part II : Impact on PM2.5 Mass Concentrations Simulated

open access: yesAsian Journal of Atmospheric Environment, 2014
In the companion paper (Lee et al., 2012), it was showed that CMAQ simulation using a lateral boundary conditions (LBCs) derived from RAQMS-CMAQ linkage, compared to the CMAQ results with the default CMAQ LBCs, improved ozone simulations in the ...
DaeGyun Lee
doaj   +1 more source

Comparison of PM2.5 Chemical Components over East Asia Simulated by the WRF-Chem and WRF/CMAQ Models: On the Models’ Prediction Inconsistency

open access: yesAtmosphere, 2019
High levels of atmospheric concentration of PM2.5 (particulate matters less than 2.5 μm in size) are one of the most urgent societal issues over the East Asian countries.
Min-Woo Choi   +4 more
doaj   +1 more source

Future year ozone source attribution modeling study using CMAQ-ISAM [PDF]

open access: yesJournal of the Air & Waste Management Association, 2018
To achieve the current United States National Ambient Air Quality Standards (NAAQS) attainment level for ozone or particulate matter, current photochemical air quality models include tools to determine source apportionment and/or source sensitivity.
Susan, Collet   +4 more
openaire   +2 more sources

Evaluation of Ensemble Approach for O3 and PM2.5 Simulation

open access: yesAsian Journal of Atmospheric Environment, 2010
Inter-comparison of chemical transport models (CTMs) was conducted among four modeling research groups. Model performance of the ensemble approach to O3 and PM2.5 simulation was evaluated by using observational data with a time resolution of 1 or 6 hours
Yu Morino   +8 more
doaj   +1 more source

Development and evaluation of the Screening Trajectory Ozone Prediction System (STOPS, version 1.0) [PDF]

open access: yesGeoscientific Model Development, 2015
A hybrid Lagrangian–Eulerian based modeling tool has been developed using the Eulerian framework of the Community Multiscale Air Quality (CMAQ) model. It is a moving nest that utilizes saved original CMAQ simulation results to provide boundary conditions,
B. H. Czader   +4 more
doaj   +1 more source

The Meteorology-Chemistry Interface Processor (MCIP) for the CMAQ modeling system: updates through MCIPv3.4.1 [PDF]

open access: yesGeoscientific Model Development, 2010
The Community Multiscale Air Quality (CMAQ) modeling system, a state-of-the-science regional air quality modeling system developed by the US Environmental Protection Agency, is being used for a variety of environmental modeling problems including ...
T. L. Otte, J. E. Pleim
doaj   +1 more source

The first application of a numerically exact, higher-order sensitivity analysis approach for atmospheric modelling: implementation of the hyperdual-step method in the Community Multiscale Air Quality Model (CMAQ) version 5.3.2 [PDF]

open access: yesGeoscientific Model Development
Sensitivity analysis in chemical transport models quantifies the response of output variables to changes in input parameters. This information is valuable for researchers engaged in data assimilation and model development.
J. Liu, E. Chen, S. L. Capps
doaj   +1 more source

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