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, Год журнала: 2024, Номер 16(4)

Опубликована: Апрель 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.

Язык: Английский

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The effect of cross-regional transport on ozone and particulate matter pollution in China: A review of methodology and current knowledge

The Science of The Total Environment, Год журнала: 2024, Номер 947, С. 174196 - 174196

Опубликована: Июнь 26, 2024

China is currently one of the countries impacted by severe atmospheric ozone (O

Язык: Английский

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Reactive Nitrogen Partitioning Enhances the Contribution of Canadian Wildfire Plumes to US Ozone Air Quality

Geophysical Research Letters, Год журнала: 2024, Номер 51(15)

Опубликована: Авг. 6, 2024

Abstract Quantifying the variable impacts of wildfire smoke on ozone air quality is challenging. Here we use airborne measurements from 2018 Western Wildfire Experiment for Cloud Chemistry, Aerosol Absorption, and Nitrogen (WE‐CAN) to parameterize emissions reactive nitrogen (NO y ) wildfires into peroxyacetyl nitrate (PAN; 37%), NO 3 − (27%), (36%) in a global chemistry‐climate model with 13 km spatial resolution over contiguous US. The partitioning, compared emitting all as NO, reduces bias near‐fire plumes sampled by aircraft enhances downwind 5–10 ppbv when Canadian travel Washington, Utah, Colorado, Texas. Using multi‐platform observations, identify smoke‐influenced days daily maximum 8‐hr average (MDA8) 70–88 Kennewick, Salt Lake City, Denver Dallas. On these days, enhanced MDA8 5–25 ppbv, through produced remotely during plume transport locally via interactions urban emissions.

Язык: Английский

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Aging of Volatile Organic Compounds in October 2017 Northern California Wildfire Plumes

Environmental Science & Technology, Год журнала: 2022, Номер 56(3), С. 1557 - 1567

Опубликована: Янв. 17, 2022

In the western United States, number and severity of large wildfires have been growing for decades. Biomass burning (BB) is a major source volatile organic compounds (VOCs) to atmosphere both globally regionally. Following emission, BB VOCs are oxidized while being transported downwind, producing ozone, secondary aerosols, hazardous VOCs. this research, we measured using proton transfer reaction time-of-flight mass spectrometry (PTR-ToF-MS) in an urban area 55–65 km downwind October 2017 Northern California wildfires. Nonaromatic oxygenated were dominant component measured. smoke plumes, account 70–75% total observed carbon, with remainder particulate matter (with diameter <2.5 μm, PM2.5). We show that correlation furan (primary VOC) maleic anhydride (secondary can indicate origin This was further confirmed by diurnal variations their concentration-weighted trajectories. Oxidation during transport consumed highly reactive including benzenoids, furanoids, terpenoids produced more Furthermore, wildfire altered ozone formation regime raised O3 levels San Francisco Bay Area.

Язык: Английский

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Of Sea and Smoke: Evidence of Marine Dissolved Organic Matter Deposition from 2020 Western United States Wildfires

Environmental Science & Technology Letters, Год журнала: 2022, Номер 9(10), С. 869 - 876

Опубликована: Авг. 29, 2022

The record-setting wildfires that ravaged the western United States throughout 2020 released high concentrations of organic carbon (C) into environment, including adjacent Pacific Ocean. Yet little is known about fate marine wildfire-derived C, solubilized as dissolved matter (DOM), despite growing observations ash deposition in such systems. We sought to quantify and characterize DOM inputs surface waters spanning California coastline from August 1 October 31, 2020. Across over 290 field samples, C peaked 2- 4-fold higher after eruption fire systems than immediate pre-wildfire levels. were well correlated with atmospheric pyrogenic proxies PM2.5 ozone, supporting sourcing. Molecular characterization by ultrahigh-resolution FTICR-MS revealed both a diversity formulas, consensus heterogeneity, temporal shifts conserved across sites. An initial increase highly aromatic, oxygen-containing compounds aligned concentrations, burn extent, deposition. Over time, transformation increasingly aliphatic occurred. latter hypothesized be result complex interplay between biotic abiotic processes, warranting further study. Our suggest are substantial yet dynamic source C.

Язык: Английский

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