Does smoke from burning different things change the sky to different colors?

"SSA and AAE cannot be directly predicted based on fuel type because they depend strongly on burn conditions."

"Notably, these parameterizations are effective for emissions from Indonesian peat, which have very little black carbon but significant brown carbon (SSA = 0.990 ± 0.001 at 532 and 660 nm, SSA = 0.937 ± 0.011 at 405 nm)."

"Utilizing spectral irradiance data, the model retrieved values of ω0decreased with increasing wavelength, with the change of ω0as a function of wavelength differing on different days."

"Single scattering albedo values at 405 nm ranging from 0.37 to 0.95 were measured for different fuel types"

"single‐scattering albedo averages 0.87 ±0.08 at 670 nm"

"Values of ω0, at approximately 550 nm, estimated from this technique using broadband 400–700 nm irradiance measurements, ranged from approximately 0.82 to 0.94 for the dates and times of these SCAR‐B measurements."

"For biomass smoke, Ångström exponents as high as 3.5 were found in association with smoke having single scattering albedo near unity."

"Typically between 0.7 and 0.95” this statement is not always true for BBsmoke. Therearelotsoflaboratoryandambientstudieswhichshowsahugerange of SSA from BB emissions"

"The spectral dependence of the single‐scattering albedo has both tendencies: decreasing and increasing with wavelength."

"An absorption Ångström exponent near unity is commonly observed for motor vehicle emission‐generated black carbon aerosol."

"The simulations show that both MAE and MSE can exhibit strong and diverse changes during BB aerosol evolution mostly due to significant changes in the aerosol particle size distribution."

"Across all five regions, wildfire-derived BrC exhibits substantial absorption not only in the near-ultraviolet and short-wavelength visible range (~400 nm), but also in the mid- to long-visible wavelengths (500–700 nm)."

"These aerosols exhibit substantial absorption across the visible spectrum, with mass absorption efficiencies (MAE OC ) between 0.5 and 1.5 m 2 g −1 at ~500 nm."

"In several wildfire events, BrC absorption at visible wavelengths equals or even surpasses that of BC, highlighting BrC as a substantial absorber."

"Notably, they are considerably lower than those typically reported for weakly absorbing BrC, which generally range from 4 to 11 in literature"

"Results show that ω varies strongly with fire‐integrated modified combustion efficiency (MCEFI)—higher MCEFI results in lower ω values and greater spectral dependence of ω."

"These properties are related to fuel type, fire intensity, combustion efficiency, and particle composition."

"The parameterization suggests that MCEFI explains 60% of the variability in ω, while the 40% unexplained variability could be accounted for by other parameters such as fuel type."

"The wavelength dependence of ω0varied significantly over the region, with greater decreases for increasing wavelength at smoke‐dominated sites than for sites influenced by a significant coarse mode aerosol component."

"The optical properties of smoke from individual biomass fires in Brazil differ significantly from those of smoke from biomass burning in North America."

"other aerosols including fossil fuel burning, industrial, and aeolian coarse mode types also contributed to the aerosol mixture in other regions (South Africa and Mozambique)"

"In particular, the total light‐scattering coefficient for smoke particles in Brazil is, on average, 15% less than for smoke particles in North America."

"as a result of both methods retrieving the imaginary index of refraction (∼0.030–0.035 on one day) with very little wavelength dependence."

"Also, the average values of the single‐scattering albedos of smoke particles in Brazil are 0.05 to 0.1 less than those in North America."