Transport and evolution of the 2009 Australian Black Saturday bushfire smoke in the lower stratosphere observed by OSIRIS on Odin

摘要: [1] We report the transport and evolution of Victorian Black Saturday bushfire smoke plume in lower stratosphere during February–June 2009 period. Vertical profiles limb-scattered spectral solar radiation measured by Optical Spectrograph Infrared Imager System (OSIRIS) instrument on Odin satellite are used for this purpose. According to OSIRIS measurements, main material penetrated above tropopause 11 February 2009. It traveled westward circled globe about 6 weeks from its first detection stratosphere, remaining tropical channel between 5°S 25°S. The gradually advected ∼19 km mid-February ∼22 April, with a vertical extent varying 2 km. background radiances at corresponding altitudes latitudes were subtracted plume-containing obtain net peak radiances. latter parameter, governed number, size, chemical composition particles, decreased half every 19 days until end April Pollution 18–22 5°S–25°S latitudes, caused dispersion, was up 35% background. By mid-June 2009, these had almost returned their levels.