Radiative properties of Mount Pinatubo volcanic aerosols over the tropical Atlantic

Details Radiative properties of Mount Pinatubo volcanic aerosols over the tropical Atlantic Radiative properties of Mount Pinatubo volcanic aerosols over the tropical Atlantic

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20..137s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 2, p. 137-140.

Physics

2

Aerosols, Atlantic Ocean, Optical Thickness, Tropical Regions, Volcanoes, Broadband, Near Infrared Radiation, Philippines, Rayleigh Scattering

Scientific paper

Aircraft measurements of the broadband and near infrared optical depths of stratospheric aerosols over the south Atlantic five months after the eruption of Mount Pinatubo gave values in tropical latitudes up to 0.21 at 6 deg S. The measured downward shortwave irradiance was similar to the normal aerosol free case but 20 deg of the direct solar irradiance was scattered into the diffuse irradiance component. At 0.55 micron wavelength an asymmetry factor of 0.75 decreasing to 0.5 at 2.2 micron was inferred from narrowband radiances scattered by the aerosol. Model calculations using these measurements predict a decrease in tropospheric heating rate of less than 0.2 C/day due to these aerosols.

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