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Report on Atmospheric Effects (1995-2001) — October 1995

Bulletin of the Global Volcanism Network, vol. 20, no. 10 (October 1995)
Managing Editor: Richard Wunderman.

Atmospheric Effects (1995-2001) Lidar data from Germany and Virginia

Please cite this report as:

Global Volcanism Program, 1995. Report on Atmospheric Effects (1995-2001). In: Wunderman, R. (ed.), Bulletin of the Global Volcanism Network, 20:10. Smithsonian Institution.



Atmospheric Effects (1995-2001)

All times are local (unless otherwise noted)


Lidar data from Germany for July and August (table 4) again revealed the presence of a volcanic aerosol layer centered at 17-19 km altitude. Backscattering ratios have decreased since the last reports (Bulletin v. 20, nos. 2 and 7). October lidar data from Hampton, Virginia, showed an aerosol layer at 18-19 km altitude; these values are similar to the previous report (Bulletin v. 19, no. 11). Backscatter data declined to the range of 1.22-1.25 from 1.38-1.50.

Table 4. Lidar data from Germany and Virginia, USA, showing altitudes of aerosol layers. Backscattering ratios are for the ruby wavelength of 0.69 microns. The integrated value shows total backscatter, expressed in steradians^-1, integrated over 300-m intervals from the tropopause to 30 km.

DATE LAYER ALTITUDE (km) (peak) BACKSCATTERING RATIO BACKSCATTERING INTEGRATED
Garmisch-Partenkirchen, Germany (47.5°N, 11.0°E)
07 Jul 1995 11-27 (19.7) 1.12 (1.3) --
19 Jul 1995 12-26 (19.8) 1.13 (1.3) --
21 Jul 1995 13-29 (18.0) 1.12 (1.3) --
26 Jul 1995 11-28 (19.1) 1.13 (1.3) --
31 Jul 1995 13-24 (18.8) 1.09 (1.2) --
03 Aug 1995 12-27 (17.5) 1.12 (1.3) --
Hampton, Virginia (37.1°N, 76.3°W)
23 Mar 1995 12-25 (17.8) 1.36 0.135 x 10-3
04 May 1995 12-25 (18.7) 1.3 0.104 x 10-3
19 Oct 1995 15-30 (18.1) 1.22 0.059 x 10-3
23 Oct 1995 15-30 (18.8) 1.25 0.065 x 10-3

Information Contacts: Horst Jager, Fraunhofer -- Institut fur Atmospharische Umweltforschung, Kreuzeckbahnstrasse 19, D-8100 Garmisch-Partenkirchen, Germany; Mary Osborn, NASA Langley Research Center (LaRC), Hampton VA 23665, USA.