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Report on Atmospheric Effects (1980-1989) — February 1988

Atmospheric Effects (1980-1989)

Scientific Event Alert Network Bulletin, vol. 13, no. 2 (February 1988)
Managing Editor: Lindsay McClelland.

Atmospheric Effects (1980-1989) Stratospheric aerosol concentrations continue to decline

Please cite this report as:

Global Volcanism Program, 1988. Report on Atmospheric Effects (1980-1989) (McClelland, L., ed.). Scientific Event Alert Network Bulletin, 13:2. Smithsonian Institution.

Atmospheric Effects (1980-1989)

All times are local (unless otherwise noted)

Stratospheric aerosol concentrations continued to decline in the absence of new large explosive eruptions (figure 54). Lidar profiles from Mauna Loa, Hawaii showed a return to conditions similar to those before the November 1985 Ruiz eruption. A distinct change was evident between the 1 March measurements from Hampton, VA and the previous data set in December, but values had not yet returned to background.

Figure with caption Figure 54. Lidar data from various locations, showing altitudes of aerosol layers during February-March 1988. Note that some layers have multiple peaks. Backscattering ratios are for the ruby wavelength of 0.69 µm. Integrated values show total backscatter, expressed in steradians-1, integrated over 300-m intervals from 16-33 km at Mauna Loa and from the tropopause to 30 km at Hampton, Virginia. Altitudes of maximum backscattering ratios and coefficients are shown for each layer at Mauna Loa.

Information Contacts: Thomas DeFoor, Mauna Loa Observatory, P. O. Box 275, Hilo, HI 96720 USA; Horst Jäger, Fraunhofer-Institut für Atmosphärische Umweltforschung, Kreuzeckbahnstrasse 19, D-8100 Garmisch-Partenkirchen, West Germany; William Fuller, NASA Langley Research Center, Hampton, VA 23665 USA.