Results 61 to 70 of about 1,998 (179)

A framework for expanding aqueous chemistry in the Community Multiscale Air Quality (CMAQ) model version 5.1 [PDF]

Geoscientific Model Development, 2017
This paper describes the development and implementation of an extendable aqueous-phase chemistry option (AQCHEM − KMT(I)) for the Community Multiscale Air Quality (CMAQ) modeling system, version 5.1.
K. M. Fahey, A. G. Carlton, H. O. T. Pye, J. Baek, W. T. Hutzell, C. O. Stanier, K. R. Baker, K. W. Appel, M. Jaoui, J. H. Offenberg   +9 more
doaj   +1 more source

iTransformer‐Informed Hourly Surface Ozone Forecasting Using Geostationary Satellite Observations

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract Previous machine learning approaches for surface ozone (O3) forecasting are often limited to site‐specific applications and struggle to capture regional pollution dynamics. Here, we introduce an inverted Transformer (iTransformer), a time‐series model that integrates hourly satellite‐derived surface O3 with key meteorological and environmental
Fan Cheng, Jing Wei, Fuzhong Weng, Shan Zhou, Zeyu Yang, Yang Cheng, Jian Gao, Xinghua Qiu, Tong Zhu   +8 more
wiley   +1 more source

Evaluation of air quality using the CMAQ modeling system

Procedia Environmental Sciences, 2012
AbstractAir pollution in modern city is very important for people's health and environment management. In order to improve air quality forecasting and air pollution simulation in China, this paper gives a method of analyzing and evaluating air pollutants ozone using the Community Multiscale Air Quality modeling system.
Luo, Xi, Cao, Han
openaire   +1 more source

Measured and modelled ozone photochemical production in the Baltimore-Washington airshed

Atmospheric Environment: X, 2019
Ozone production efficiency (OPE) represents the number of ozone (O3) molecules produced per molecule of NOx (NO2+NO), before NOx is converted to a sink or reservoir species. Observations from NASA's July 2011 DISCOVER-AQ (D-AQ) campaign in the Baltimore-
Linda Hembeck, Hao He, Timothy P. Vinciguerra, Timothy P. Canty, Russell R. Dickerson, Ross J. Salawitch, Christopher Loughner   +6 more
doaj   +1 more source

Harmful Effects of Ambient Nitrogen Dioxide on Atopic Dermatitis: Comparison of Exposure Assessment Based on Monitored Concentrations and Modeled Estimates

Atmosphere, 2020
Precise exposure assessment of air pollutants is crucial in epidemiologic studies to ensure valid estimates of health effects. We conducted a longitudinal study to evaluate the role of air quality monitoring (AQM) measurements and high-resolution ...
Young-Min Kim, Inbo Oh, Jihyun Kim, Yoon-Hee Kang, Kangmo Ahn   +4 more
doaj   +1 more source

Integrating multimedia models to assess nitrogen losses from the Mississippi River basin to the Gulf of Mexico [PDF]

Biogeosciences, 2018
This study describes and implements an integrated, multimedia, process-based system-level approach to estimating nitrogen (N) fate and transport in large river basins.
Y. Yuan, R. Wang, E. Cooter, L. Ran, P. Daggupati, D. Yang, R. Srinivasan, R. Srinivasan, A. Jalowska   +8 more
doaj   +1 more source

Evaluation of impact of residential heating on air quality of megacity Istanbul by CMAQ

Science of The Total Environment, 2019
Residential heating is one of the major sectors that contribute to emissions of harmful air pollutants in urban areas. In Istanbul, local sources are the main contributors of particulate matter levels. To quantify the contributions of residential heating sector to ambient particulate matter concentrations, we have developed an up to date spatially ...
Metin Baykara, Ulas Im, Alper Unal
openaire   +3 more sources

The impact of satellite-adjusted NO_x emissions on simulated NO_x and O₃ discrepancies in the urban and outflow areas of the Pacific and Lower Middle US [PDF]

Atmospheric Chemistry and Physics, 2014
We analyze the simulation results from a CMAQ model and GOME-2 NO2 retrievals over the United States for August 2009 to estimate the model-simulated biases of NOx concentrations over six geological regions (Pacific Coast = PC, Rocky Mountains = RM, Lower
Y. Choi
doaj   +1 more source

Plant species richness response to atmospheric nitrogen deposition across bedrock types in the United States and Czechia

Ecosphere, Volume 17, Issue 5, May 2026.
Abstract Atmospheric nitrogen (N) deposition leads to many changes in terrestrial and aquatic ecosystems, affecting ecosystem processes and species composition. Terrestrial vegetation often shifts from being N‐limited to light‐limited and becomes dominated by a few fast‐growing strong competitors and generalist species.
Tomáš Chuman, Christopher M. Clark
wiley   +1 more source

Regional Transport in the Arctic: Sensitivity of NOx and Particulate Matter in Wintertime Urban Alaska to Background Air

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 7, 16 April 2026.
Abstract Fairbanks, Alaska is an example of a subarctic city that experiences severe wintertime air quality episodes characterized by high concentrations of fine particulate matter (PM2.5) and nitrogen oxides (NO and NO2 = NOx). Previous research into these air quality episodes has focused on the impact of surface‐based inversions that trap local ...
Alicia Hoffman, Steve R. Arnold, Dwayne Heard, Lisa Whalley, Natalie Brett, Kathy S. Law, Jean‐Christophe Raut, Tatsuo Onishi, Slimane Bekki, William R. Simpson, Meeta Cesler‐Maloney, Brice Barret, Roman Pohorsky, Julia Schmale, Brice Temime‐Roussel, Barbara D’Anna   +15 more
wiley   +1 more source