Results 61 to 70 of about 1,908 (162)

Systematic analysis of interannual and seasonal variations of model-simulated tropospheric NO₂ in Asia and comparison with GOME-satellite data [PDF]

Atmospheric Chemistry and Physics, 2007
Systematic analyses of interannual and seasonal variations of tropospheric NO2 vertical column densities (VCDs) based on GOME satellite data and the regional scale chemical transport model (CTM), Community Multi-scale Air Quality (CMAQ), are presented ...
I. Uno, Y. He, T. Ohara, K. Yamaji, J.-I. Kurokawa, M. Katayama, Z. Wang, K. Noguchi, S. Hayashida, A. Richter, J. P. Burrows   +10 more
doaj  

Evaluation of Satellite‐Based Lightning NOx Columns Using In‐Cloud Aircraft Measurements

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 17, 16 September 2025.
Abstract Lightning is the largest source of NOx in the upper troposphere, where it affects the distributions of tropospheric ozone, hydroxyl radical (OH), and methane. In this study, ozone monitoring instrument (OMI)‐based LNOx columns are evaluated using aircraft‐based columns from case studies during the Deep Convective Clouds and Chemistry (DC3 ...
Madilynn Seiler, Kenneth Pickering, Dale Allen, Eric Bucsela, Heidi Huntrieser   +4 more
wiley   +1 more source

Increasing Contribution of Condensable Particulate Matter From Stationary Combustion Sources Under Strict Control Standards in China

Geophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract China's implementation of stringent emission control measures during 2014–2020 has effectively reduced filterable particulate matter (FPM) emissions from stationary combustion sources, while increasing the contribution of condensable particulate matter (CPM) to total PM emissions.
Yi Su, Yuanzheng Chen, Huantao Wang, Di Wu, Peng Xu, Xiwen Song, Tonghao Liu, Runlong Cai, Dongbin Wang, Jingkun Jiang, Jianmin Chen, Qing Li   +11 more
wiley   +1 more source

Ozone and NO_x chemistry in the eastern US: evaluation of CMAQ/CB05 with satellite (OMI) data [PDF]

Atmospheric Chemistry and Physics, 2015
Regulatory air quality models, such as the Community Multiscale Air Quality model (CMAQ), are used by federal and state agencies to guide policy decisions that determine how to best achieve adherence with National Ambient Air Quality Standards for ...
T. P. Canty, L. Hembeck, T. P. Vinciguerra, D. C. Anderson, D. L. Goldberg, S. F. Carpenter, D. J. Allen, C. P. Loughner, R. J. Salawitch, R. R. Dickerson   +9 more
doaj   +1 more source

Improved Simulation of Particle Number Concentrations Over the US: Integrating a Size‐Resolved Advanced Particle Microphysics Model Into CMAQ

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 16, 28 August 2025.
Abstract Accurate representation of aerosol size distributions and total number concentrations is critical for evaluating particle impacts on climate, clouds, and public health. An Advanced Particle Microphysics model (APM) has been integrated into the USEPA's Community Multiscale Air Quality Modeling System (CMAQ) to improve its representation of ...
Jingbo Mao, Fangqun Yu, Benjamin N. Murphy, Jingyu An, Yan Zhang, Gan Luo, Shao Lin, A. Gannet Hallar   +7 more
wiley   +1 more source

Evidence of local adaptation to aridity but not nitrogen deposition in invasive annuals

Ecology, Volume 106, Issue 7, July 2025.
Abstract Rapid adaptation of traits and trait plasticity may contribute to plant invasiveness and confer fitness advantages in novel environments resulting from global change. The importance of trait differentiation in invasive plant populations is well recognized, particularly in response to climate.
Justin M. Valliere, Mayra J. Hernández, M. Rasoul Sharifi, Philip W. Rundel   +3 more
wiley   +1 more source

Environmental Impact and Carbon Emissions of Sport Events: The Significance of Scope 3

WIREs Climate Change, Volume 16, Issue 4, July/August 2025.
This review examines how the environmental impacts of sport events, with a focus on Scope 3 emissions, are being assessed across different regions and event types. It identifies key methodological gaps and offers insights to support more sustainable practices in the sports sector.
Yongjoon Bae, Brian P. McCullough
wiley   +1 more source

Understanding the Recent Stagnation in PM2.5 Concentrations Across the United States: A Seasonal Composition Perspective

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 12, 28 June 2025.
Abstract Long‐term declines in concentrations of fine particulate matter (PM2.5) in the United States (U.S.) have been disrupted in recent years, with recent trends stagnating or reversing. In this study, we analyze surface observations of PM2.5 composition from 2002 to 2022 to identify the chemical components driving this shift.
Racine Nassau, Lyatt Jaeglé
wiley   +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