Modeling the Air Pollution and Aerosol‐PBL Interactions Over China Using a Variable‐Resolution Global Model

Journal of Geophysical Research Atmospheres, Journal Year: 2023, Volume and Issue: 128(22)

Published: Nov. 23, 2023

Abstract Modeling air quality has always been a challenge in global models constrained by coarse grids. Here, the variable‐resolution Community Atmosphere Model with full chemistry based on scalable spectral element (SE) dynamical core (MUSICAv0) is applied simulating pollution finer grid resolution of ∼0.25° over East Asia (SE_VR), contrast to same model uniform ∼1.0° (SE_UR). Two nudging experiments and four free‐running are conducted investigate capabilities SE_VR modeling aerosol‐planetary boundary layer (PBL) interactions China. Results show regional refinement essential for haze events complex terrain areas attributed its better performance representing local vertical horizontal dispersion conditions. shows prominent advantages SE_UR surface ozone because resolving spatial segregation NO x volatile organic compounds (VOC) chemical regimes subsequently more detailed processes related formation, although generally overestimates Further analysis daytime radiative effect black carbon (BC) aerosols lowers PBL height 12.0% (17.9%), leads an increase PM 2.5 14.5% (10.8%) under moderate (severe) conditions Sichuan Basin. However, deficiencies BC‐PBL due inability reproduce strong inverse temperature structure caused BC lower atmosphere layer. Our results highlight value climate.

Language: Английский

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The GFDL Variable‐Resolution Global Chemistry‐Climate Model for Research at the Nexus of US Climate and Air Quality Extremes

Journal of Advances in Modeling Earth Systems, Journal Year: 2024, Volume and Issue: 16(4)

Published: April 1, 2024

Abstract We present a variable‐resolution global chemistry‐climate model (AM4VR) developed at NOAA's Geophysical Fluid Dynamics Laboratory (GFDL) for research the nexus of US climate and air quality extremes. AM4VR has horizontal resolution 13 km over US, allowing it to resolve urban‐to‐rural chemical regimes, mesoscale convective systems, land‐surface heterogeneity. With gradually reducing 100 Indian Ocean, we achieve multi‐decadal simulations driven by observed sea surface temperatures 50% computational cost 25‐km uniform‐resolution grid. In contrast with GFDL's AM4.1 contributing sixth Coupled Model Intercomparison Project resolution, features much improved mean patterns variability. particular, shows representation of: precipitation seasonal‐to‐diurnal cycles extremes, notably central dry‐and‐warm bias; western snowpack summer drought, implications wildfires; North American monsoon, affecting dust storms. exhibits excellent winter precipitation, pollution meteorology in California complex terrain, enabling skillful prediction both extreme ozone haze events Central Valley. also provides vast improvements process‐level representations biogenic volatile organic compound emissions, interactive emissions from land, removal pollutants terrestrial ecosystems. highlight value increased representing climate–air interactions through land‐biosphere feedbacks. offers novel opportunity study dimensions quality, especially role Earth system feedbacks changing climate.

Language: Английский

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Quantifying the diurnal variation in atmospheric NO₂ from Geostationary Environment Monitoring Spectrometer (GEMS) observations

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(15), P. 8943 - 8961

Published: Aug. 15, 2024

Abstract. The Geostationary Environment Monitoring Spectrometer (GEMS) over Asia is the first geostationary Earth orbit instrument in virtual constellation of sensors for atmospheric chemistry and composition air quality research applications. For time, hourly observations enable studies diurnal variation several important trace gas aerosol pollutants including nitrogen dioxide (NO2), which focus this work. NO2 a regulated pollutant an indicator anthropogenic emissions addition to being involved tropospheric ozone particulate matter formation. We present new quantitative measures column can be greater than 50 % amount, especially polluted environments. distribution seen change quite different from what would by once-a-day low-Earth-orbit satellite observation. use GEMS data combination with TROPOspheric Instrument (TROPOMI) Pandora ground-based remote sensing measurements Multi-Scale Infrastructure Chemistry Aerosols (Version 0, MUSICAv0) 3D chemical transport model analysis examine January June 2023 Northeast Seoul, South Korea, study regions distinguish emissions, chemistry, meteorological processes that drive variation. Understanding relative importance these will key models aimed at determining true exposure levels studies. work presented here also provides path investigating similar cycles Venture Instrument-1 Tropospheric Emissions: Pollution (TEMPO) North America, later Europe Sentinel-4.

Language: Английский

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Responses of fine particulate matter (PM2.5) air quality to future climate, land use, and emission changes: Insights from modeling across shared socioeconomic pathways

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 948, P. 174611 - 174611

Published: July 9, 2024

Air pollution induced by fine particulate matter with diameter ≤ 2.5 μm (PM2.5) poses a significant challenge for global air quality management. Understanding how factors such as climate change, land use and cover change (LULCC), changing emissions interact to impact PM2.5 remains limited. To address this gap, we employed the Community Earth System Model examined both individual combined effects of these on surface in 2010 projected scenarios 2050 under different Shared Socioeconomic Pathways (SSPs). Our results reveal biomass-burning anthropogenic primary drivers across all SSPs. Less polluted regions like US Europe are expected experience substantial reduction future scenarios, reaching up ~5 μg m−3 (70 %) SSP1. However, heavily India China may varied outcomes, potential decrease SSP1 increase SSP3. Eastern witness ~20 % rise SSP3, while northern ~70 same scenario. Depending region, alone is ±5 m−3, influence LULCC appears even weaker. The modest changes attributable associated aerosol chemistry meteorological effects, including biogenic volatile organic compound emissions, SO2 oxidation, NH4NO3 formation. Despite their comparatively minor role, can still significantly shape specific regions, potentially counteracting benefits emission control initiatives. This study underscores pivotal role shaping SSP scenarios. Thus, addressing contributing factors, focus reducing crucial achieving sustainable levels meeting mitigation goals.

Language: Английский

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Midlatitude Ozone Depletion and Air Quality Impacts from Industrial Halogen Emissions in the Great Salt Lake Basin

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(5), P. 1870 - 1881

Published: Jan. 25, 2023

We report aircraft observations of extreme levels HCl and the dihalogens Cl2, Br2, BrCl in an industrial plume near Great Salt Lake, Utah. Complete depletion O3 was observed concurrently with halogen enhancements as a direct result photochemically produced radicals. Observed fluxes for HCl, NOx agreed facility-reported emissions inventories. Bromine are not required to be reported inventory, but estimated 173 Mg year-1 Br2 949 BrCl, representing major uncounted oxidant source. A zero-dimensional photochemical box model reproduced depletions demonstrated that bromine radical cycling principally responsible rapid depletion. Inclusion both 3D chemical showed significant increases oxidants particulate matter (PM2.5) populated regions Lake Basin, where winter PM2.5 is among most severe air quality issues U.S. The shows regional 10%-25% attributable this single source, demonstrating impact underreported on oxidation sources within urban area western

Language: Английский

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Long‐Term Impacts of Global Solid Biofuel Emissions on Ambient Air Quality and Human Health for 2000–2019

GeoHealth, Journal Year: 2025, Volume and Issue: 9(3)

Published: Feb. 27, 2025

Abstract Globally, solid biofuels (SB) have been widely used for household cooking and energy production decades due to electricity shortages socio‐economic barriers adopting renewable alternatives. This has detrimental effects on air quality, human health, climate through trace gas aerosol emissions. Despite numerous studies, the long‐term consequences of SB emissions remain poorly understood. Here, we use Community Earth System Model Emissions Data emission inventory investigate impacts quality health 2000–2019. Global increased ambient PM 2.5 (particulate matter with aerodynamic diameters μm) ozone (O 3 ) concentrations up 23.61 /m 13.69 ppbv, significant found in India, China, Rest Asia (ROA). Our study estimates total annual premature deaths (APDs) associated global SB‐attributable O exposure as 1.11 million [95% confidence interval (95% CI): 1.00–1.22 million] 2000 1.43 CI: 1.30–1.56 million) 2019. China's APDs reduced substantially, whereas India ROA had a major leap both 2019 compared 2000. progress cutting residential accounts its improvements. urges reduction usage potentially improve overall conditions, especially highly populated, low‐ middle‐income countries, where poor burden attributable are estimated be higher.

Language: Английский

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Disproportionately large impacts of wildland-urban interface fire emissions on global air quality and human health

Science Advances, Journal Year: 2025, Volume and Issue: 11(11)

Published: March 14, 2025

Fires in the wildland-urban interface (WUI) are a global issue with growing importance. However, impact of WUI fires on air quality and health is less understood compared to that wildland. We analyze fire impacts at scale using multi-scale atmospheric chemistry model—the Multi-Scale Infrastructure for Chemistry Aerosols model (MUSICA). have notable key pollutants [e.g., carbon monoxide (CO), nitrogen dioxide (NO 2 ), fine particulate matter (PM 2.5 ozone (O 3 )]. The emission disproportionately large wildland primarily because closer human settlement. Globally, fraction fire–caused annual premature deaths (APDs) all APDs about three times emissions emissions. developed framework can be applied address critical needs understanding mitigating their impacts.

Language: Английский

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Next Generation Air Quality Models: Dynamical Mesh, New Insights into Mechanism, Datasets and Applications

Current Pollution Reports, Journal Year: 2025, Volume and Issue: 11(1)

Published: April 26, 2025

Language: Английский

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Hymeshai: Deep Learning Enabled Three-Dimensional Adaptive Mesh Generator for High-Resolution Atmospheric Simulations

Published: Jan. 1, 2025

Language: Английский

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Implementation and evaluation of the GEOS-Chem chemistry module version 13.1.2 within the Community Earth System Model v2.1

Geoscientific model development, Journal Year: 2022, Volume and Issue: 15(23), P. 8669 - 8704

Published: Nov. 30, 2022

Abstract. We implement the GEOS-Chem chemistry module as a chemical mechanism in version 2 of Community Earth System Model (CESM). Our implementation allows state-of-the-science to be used with identical emissions, meteorology, and climate feedbacks CAM-chem within CESM. use coupling interfaces allow operate almost unchanged Aerosols are converted at each time step between bulk representation size-resolved CESM's Modal Aerosol (MAM4). Land-type information needed for dry-deposition calculations is communicated through coupler, allowing online land–atmosphere interactions. Wet scavenging replaced Neu Prather scheme, common emissions approach developed both compare how embedded CESM (C-GC) compares existing option (C-CC) when simulate atmospheric 2016, meteorology emissions. composition deposition tendencies two simulations evaluate residual differences C-GC its stand-alone transport model High Performance configuration (S-GC). find that stratospheric ozone agrees well three models, less than 10 % core layer, but troposphere generally lower either C-CC or S-GC. This likely due greater tropospheric concentrations bromine, although other factors such water vapor may contribute lesser extents depending on region. difference not uniform, being 30 Southern Hemisphere compared S-GC Northern Hemisphere. suggests effects anthropogenic agree those low altitudes tropics over 100 upper convective scavenging. also vary substantially CESM-implemented GEOS-Chem, simulated hydrological cycle diverges from represented source NASA Modern-Era Retrospective analysis Research Applications (Version 2; MERRA-2) reanalysis which directly (CTM). (including full chemistry–climate feedback) publicly available considered inclusion main code repository. work significant MUlti-Scale Infrastructure Chemistry (MUSICA) project, enabling communities researchers (CESM GEOS-Chem) share expertise modeling framework, thereby accelerating progress science.

Language: Английский

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