Brown carbon absorption in the Mediterranean basin from local and long-range transported biomass burning air masses

Methymaki, Georgia; Bossioli, E.; Boucouvala, Dimitra; Nenes, Athanasios; Tombrou, M.

doi:10.1016/j.atmosenv.2023.119822

Cited by 4 publications

(2 citation statements)

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“…They concluded that the version of the model that assumed chemically reactive OA agreed better with the observed AOD values. Finally, Methymaki et al applied the WRF-Chem model for August 2019 over Europe, focusing on the Mediterranean basin during the presence of wildfires. They concluded that the incorporation of BrC absorption generally improved the AAOD model performance against the AERONET and MERRA-2 data.…”

Section: Introductionmentioning

confidence: 99%

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Predicted Concentrations and Optical Properties of Brown Carbon from Biomass Burning over Europe

Skyllakou,

Korras-Carraca,

Matsoukas

et al. 2024

ACS EST Air

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Black carbon (BC) and brown carbon (BrC) are light-absorbing carbonaceous aerosol components that can contribute to radiative forcing and thus affect the climate. In this study, we focus on the modification of aerosol optical properties associated with BrC emissions from biomass burning. BrC is simulated with the introduction of three new species in the threedimensional chemical transport model PMCAMx-SR, two primaryabsorbing (inert and reactive BrC) species, and one "photobleached" BrC species. 10% of the emitted BrC is assumed to be inert, and the rest to be reactive and able to undergo photobleaching. The scattering and absorption coefficients of the aerosol for different wavelengths are estimated by using Mie theory. BrC causes a 5−15% increase of the aerosol optical depth at 550 nm in regions affected by fires and can increase light absorption by up to 12% compared to when there is no BrC. During major biomass burning events, the absorption of BrC can reach up to 13% of that of BC at 550 nm and 25% at 440 nm. The ability of the model to reproduce measured absorption is improved when BrC is added to the light-absorbing components.

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Section: Introductionmentioning

confidence: 99%

“…There are limited number of studies so far that focus on the modeling of the optical properties of BrC on a regional scale and especially over Europe. This study puts effort into enhancing our knowledge of the impact that BrC may have on the aerosol optical properties during wildfire events.…”

Section: Introductionmentioning

confidence: 99%