Early lidar observations of the June 1991 Pinatubo eruption plume at Mauna Loa Observatory, Hawaii

Details Early lidar observations of the June 1991 Pinatubo eruption plume at Mauna Loa Observatory, Hawaii Early lidar observations of the June 1991 Pinatubo eruption plume at Mauna Loa Observatory, Hawaii

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19..187d&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 19, Jan. 24, 1992, p. 187-190.

Physics

Optics

39

Aerosols, Air Pollution, Atmospheric Optics, Optical Radar, Plumes, Volcanoes, Atmospheric Attenuation, Backscattering, Solar Radiation, Stratosphere

Scientific paper

The Pinatubo plume was first observed by lidar on 1 July 1991. During July and August the observable effects from this plume increased in intensity in terms of aerosol optical properties, plume height, and broad-band solar radiation. Preliminary data analysis shows that the plume over Hawaii arrived in three generalized pulses or waves on approximately 3 July, 24 July, and 9 August. There was a decrease of about 13 percent in a broad-band atmospheric transmission factor over Hawaii between June 1991 and Pinatubo affected conditions on 31 August 1991. At the end of August 1991, the Pinatubo plume over Hawaii exhibited characteristics similar in magnitude to what was observed at Mauna Loa after the El Chichon eruption in 1982. However, the early Pinatubo maximum plume heights were lower than were observed in the early months of the El Chichon plume dispersion. The Pinatubo plume was continuing to increase in magnitude and height at the end of August.

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