AERONET-based microphysical and optical properties of smoke-dominated aerosol near source regions and transported over oceans, and implications for satellite retrievals of aerosol optical depth

摘要: Smoke aerosols from biomass burning are an important component of the global aerosol cycle. Analysis Aerosol Robotic Network (AERONET) retrievals size distribution and refractive index reveals variety between in different source regions, terms particle single scatter albedo (SSA). Case studies smoke transported to coastal/island AERONET sites also mostly lie within range variability at near-source sites. Two broad families properties found, corresponding dominated by boreal forest (larger, broader fine mode, with midvisible SSA 0.95), those influenced grass, shrub, or crop additional contributions (smaller, narrower particles 0.88-0.9 midvisible). The strongest absorption is seen southern African savanna Mongu (Zambia), average 0.85 midvisible. These can serve as candidate sets microphysicaloptical for use satellite optical depth (AOD) retrieval algorithms. models presently adopted these algorithms over ocean often insufficiently absorbing represent aerosols. A corollary this underestimate AOD outflow which has consequences applications datasets.