23 December 1994 Pinatubo climatology using the high-resolution infrared radiation sounder (HIRS)
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We report on a new application of the High Resolution Infrared Radiation Sounder (HIRS) to the global retrieval of sulphuric acid aerosol from the 15th June 1991 eruption of Mt. Pinatubo (15.1 degree(s)N,120.4 degree(s)E). The aerosol is retrieved by measuring the emitted radiance using the HIRS channel centered at 8.3 micrometers which is particularly sensitive to the aerosol. Another channel at 12.55 micrometers , which is relatively insensitive to the aerosol, is used to remove other variations in the signal. The transmission at 8.3 micrometers is retrieved and related to the column density. We present an aerosol climatology which will include latitudinal distributions of column density and monthly global mass loadings. We also attempt to retrieve particle mode radius by combining optical depth measurement (Lidar) in the visible with a retrieved column density at 8.3 micrometers . We compare and contrast lidar column density measurements with column densities obtained using HIRS.
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Anthony J. Baran, Anthony J. Baran, John S. Foot, John S. Foot, } "Pinatubo climatology using the high-resolution infrared radiation sounder (HIRS)", Proc. SPIE 2309, Passive Infrared Remote Sensing of Clouds and the Atmosphere II, (23 December 1994); doi: 10.1117/12.196668; https://doi.org/10.1117/12.196668

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