{'fraction_non_alphanumeric': 0.01334604385128694, 'fraction_numerical': 0.0, 'mean_word_length': 5.21301775147929, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Modeling the absorption properties of organic carbon in biomass burning smoke in Siberia using remote sensing data

A regional chemistry-transport model and remote sensing observations are used to study the absorption properties of organic carbon in biomass burning (BB) aerosol emitted from wildfires in Siberia. Using multi-wavelength retrievals of the absorption and extinction aerosol optical depths (AAOD and AOD) at Siberian sites of AERONET, we obtained an empirical relationship enabling the estimation of the contribution of brown carbon (BrC) to the BB aerosol absorption in a near-UV spectral region by using available satellite observations of AAOD and AOD. Application of this relationship to constrain our simulations of a large-scale episode of transport of BB plumes from Siberia towards Europe allowed us to parameterize an imaginary part of the refractive index of organic carbon in Siberian BB aerosol as a function of the BB aerosol photochemical age as well as to estimate the efficient mass fraction of BrC in the smoke plumes.