燃烧
烟雾
气溶胶
吸收(声学)
材料科学
散射
环境科学
光散射
碎片
大气科学
光学
气象学
化学
复合材料
地质学
物理
有机化学
作者
Olga Popovicheva,В. С. Козлов
出处
期刊:26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics
日期:2020-11-12
被引量:3
摘要
Impact of Siberian biomass burning phase on optical properties of smoke aerosols is investigated in smallscale fires performed in a Large Aerosol Chamber (LAC). The analyses have revealed the influence of combustion temperature on scattering and light absorption of pine and debris smoke. Scattering in smoldering phase is significantly exceeding the flaming one. Spectral absorption obtained throughout the near-ultraviolet to near-infrared spectral region emphasizes the high absorption Angstrom exponent (AAE), up to 4.4 for fresh debris smoke, and a large fraction of light-absorbing brown carbon (BrC) in the smoldering phase. In opposite, open flaming smoke shows low AAE around 1, typical for high-temperature fossil fuel combustion while mixed fires emit particles absorbing with the intermediate AAE characteristics.
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