Monitoring the Mt. Pinatubo aerosol layer with NOAA/11 AVHRR data

Details Monitoring the Mt. Pinatubo aerosol layer with NOAA/11 AVHRR data Monitoring the Mt. Pinatubo aerosol layer with NOAA/11 AVHRR data

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19..159s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 19, Jan. 24, 1992, p. 159-162.

Physics

Optics

118

Advanced Very High Resolution Radiometer, Aerosols, Air Pollution, Noaa Satellites, Pollution Monitoring, Volcanoes, Atmospheric Circulation, Atmospheric Optics, Particle Size Distribution

Scientific paper

The remote sensing technique is explained with illustrations of the composite global images, and estimates are made of the eruption magnitude and its environmental consequences. AVHRR reflectance measurements permit the extraction of aerosol-optical thicknesses by employing the NOAA/NESDIS operational algorithm. The algorithm is based on the use of look-up tables to determine size-distribution parameters, pixel selection designed to avoid specular reflection, and the interpolation of 2x2-array average radiances. The observations of the aerosol layer are presented in a series of 12 weekly composite global images and as latitudinal average/time and daily time/longitude plots for the Pacific region. The east-to-west progression of the aerosol layer is clearly indicated in the oceanic plots, and the aerosol layer circled the earth in 21 days. It is determined that the globally averaged net radiation at the top of the atmosphere can be reduced by about 2.5 W/sq m corresponding to a cooling effect of not less than 0.5 C.

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