Implementation of Dynamic Fire Injection Height in GFDL's Atmospheric Model (AM4.0): Impacts on Aerosol Profiles and Radiation DOI Creative Commons
Arman Pouyaei, Paul Ginoux, D. S. Ward

и другие.

Journal of Advances in Modeling Earth Systems, Год журнала: 2025, Номер 17(4)

Опубликована: Апрель 1, 2025

Abstract Wildfires inject aerosols into the atmosphere at varying altitudes, modifying long‐range transport, which impacts Earth's climate system and air quality. Most global models use prescribed fixed‐height injections, not accounting for dynamic variability of wildfires. In this study, we enhance injection method biomass burning implemented in Geophysical Fluid Dynamic Laboratory's Atmospheric Model version 4.0, shifting to a more mechanistic approach. We test several height schemes assess their impact on radiation budget by performing 18‐year simulations. Comparison modeled from scheme with observations indicates error within instrumental uncertainty (less than 500 m). Aerosol Optical Depth is systematically underestimated due biases emission data set, but significantly reduces bias up 0.5 optical depth units during extreme wildfire seasons over boreal forests. term vertical profile aerosol extinction coefficient, comparison satellite significant improvement below 4 km altitude. emissions changed net clear‐sky radiative flux top regionally (±1.5 Wm −2 ) reduced it −0.38 surface globally, relative baseline no fire emissions. The temperature gradient anomaly associated absorbing affects atmospheric stability circulation patterns. This study highlights need implement simulate accurately distribution interactions system.

Язык: Английский

Implementation of Dynamic Fire Injection Height in GFDL's Atmospheric Model (AM4.0): Impacts on Aerosol Profiles and Radiation DOI Creative Commons
Arman Pouyaei, Paul Ginoux, D. S. Ward

и другие.

Journal of Advances in Modeling Earth Systems, Год журнала: 2025, Номер 17(4)

Опубликована: Апрель 1, 2025

Abstract Wildfires inject aerosols into the atmosphere at varying altitudes, modifying long‐range transport, which impacts Earth's climate system and air quality. Most global models use prescribed fixed‐height injections, not accounting for dynamic variability of wildfires. In this study, we enhance injection method biomass burning implemented in Geophysical Fluid Dynamic Laboratory's Atmospheric Model version 4.0, shifting to a more mechanistic approach. We test several height schemes assess their impact on radiation budget by performing 18‐year simulations. Comparison modeled from scheme with observations indicates error within instrumental uncertainty (less than 500 m). Aerosol Optical Depth is systematically underestimated due biases emission data set, but significantly reduces bias up 0.5 optical depth units during extreme wildfire seasons over boreal forests. term vertical profile aerosol extinction coefficient, comparison satellite significant improvement below 4 km altitude. emissions changed net clear‐sky radiative flux top regionally (±1.5 Wm −2 ) reduced it −0.38 surface globally, relative baseline no fire emissions. The temperature gradient anomaly associated absorbing affects atmospheric stability circulation patterns. This study highlights need implement simulate accurately distribution interactions system.

Язык: Английский

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