Results 41 to 50 of about 1,908 (162)

Summertime weekly cycles of observed and modeled NO_x and O₃ concentrations as a function of satellite-derived ozone production sensitivity and land use types over the Continental United States [PDF]

Atmospheric Chemistry and Physics, 2012
To show how remote-sensing products can be used to classify the entire CONUS domain into "geographical regions" and "chemical regimes", we analyzed the results of simulation from the Community Multiscale Air Quality (CMAQ) model version 4.7.1 over the ...
Y. Choi, H. Kim, D. Tong, P. Lee
doaj   +1 more source

Physics‐Guided CNN‐LSTM Model With Multi‐Head Attention for Aerosol Optical Depth Prediction

Earth and Space Science, Volume 13, Issue 1, January 2026.
Abstract Accurate aerosol optical depth (AOD) prediction remains challenging due to complex aerosol‐radiation interactions and highly variable spatio‐temporal patterns. Three critical scientific issues motivate this work: understanding whether and how physical principles can enhance deep learning predictions, identifying which aerosol properties most ...
Liu Zeyang, Tan Yujun, Zhou Shengnan, Li Yarong, Zhang Jing, Yang Yadong, Shi Zhongrong, Zhou Xiancun   +7 more
wiley   +1 more source

Evaluation of a regional air-quality model with bidirectional NH₃ exchange coupled to an agroecosystem model [PDF]

Biogeosciences, 2013
Atmospheric ammonia (NH3) is the primary atmospheric base and an important precursor for inorganic particulate matter and when deposited NH3 contributes to surface water eutrophication, soil acidification and decline in species biodiversity.
J. O. Bash, E. J. Cooter, R. L. Dennis, J. T. Walker, J. E. Pleim   +4 more
doaj   +1 more source

How Will China's Surface Ozone Evolve Under Carbon Neutrality Target and Global Climate Warming?

Earth's Future, Volume 14, Issue 1, January 2026.
Abstract Surface ozone (O3) has complex relationships with its precursors and is also highly sensitive to meteorological variation and climate change. In China, ground‐level ozone pollution remains a persistent air quality concern despite decreasing concentrations of other air pollutants in recent years.
Yue Tan, Tao Wang, Yiming Liu, Yingnan Zhang, Tianshu Chen, Yurun Wang   +5 more
wiley   +1 more source

Constraining African Fire CO2 Emissions During 2015–2016 Using Satellite XCO2 Retrievals

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract Fire CO2 emissions are a critical component of the global carbon cycle, yet their estimates remain highly uncertain. This study introduces a satellite‐constrained inversion framework that jointly optimizes fire emissions and net ecosystem exchange using OCO‐2 XCO2 retrievals.
Guoyuan Lv, Fei Jiang, Shuzhuang Feng, Yongguang Zhang, Guanyu Dong, Jun Wang, Mousong Wu, Yusheng Shi, Hengmao Wang, Mengwei Jia, Lingyu Zhang, Yu Mao, Weimin Ju, Jing M. Chen   +13 more
wiley   +1 more source

Model Performance Differences in Sulfate Aerosol in Winter over Japan Based on Regional Chemical Transport Models of CMAQ and CAMx

Atmosphere, 2018
Sulfate aerosol (SO42−) is a major component of particulate matter in Japan. The Japanese model intercomparison study, J-STREAM, found that although SO42− is well captured by models, it is underestimated during winter. In the first phase of J-
Syuichi Itahashi, Kazuyo Yamaji, Satoru Chatani, Kunihiro Hisatsune, Shinji Saito, Hiroshi Hayami   +5 more
doaj   +1 more source

Hourly Nitrogen Oxides Emissions Estimated From TEMPO and Comparison With Facility‐Level Monitoring Data

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 23, 16 December 2025.
Abstract We use the directional derivative approach to estimate hourly NOx ${\text{NO}}_{x}$ emissions from NO2 ${\text{NO}}_{2}$ measured by the Tropospheric Emissions: Monitoring of Pollution (TEMPO) instrument. The hourly scanning capacity of TEMPO enables the inclusion of the tendency term, relaxing the steady‐state assumption that limits previous ...
Kang Sun, Jobaer Ahmed Saju, Caroline R. Nowlan, Gonzalo González Abad, Xiong Liu   +4 more
wiley   +1 more source

Extending the Community Multiscale Air Quality (CMAQ) modeling system to hemispheric scales: overview of process considerations and initial applications [PDF]

Atmospheric Chemistry and Physics, 2017
The Community Multiscale Air Quality (CMAQ) modeling system is extended to simulate ozone, particulate matter, and related precursor distributions throughout the Northern Hemisphere.
R. Mathur, J. Xing, J. Xing, R. Gilliam, G. Sarwar, C. Hogrefe, J. Pleim, G. Pouliot, S. Roselle, T. L. Spero, D. C. Wong, J. Young   +11 more
doaj   +1 more source

Soluble Iron in Source‐Based Anthropogenic PM2.5 Predominantly From Steel Industry and Residential Combustion in China

Geophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract Iron (Fe), especially soluble Fe, is critical in atmospheric fine particulate matter (PM) (PM2.5), while its source contribution remains unclear. Here, we systematically study soluble Fe from various sources through real‐world measurement, laboratory analyses, emission inventory, and model simulation.
Wei Cui, Xiwen Song, Yi Su, Xiu Chen, Di Wu, Qing Li   +5 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