Report on Atmospheric Effects (1995-2001) — June 1998
Atmospheric Effects (1995-2001)
Bulletin of the Global Volcanism Network, vol. 23, no. 6 (June 1998)
Managing Editor: Richard Wunderman.
Atmospheric Effects (1995-2001) Lidar data from Hawaii and Germany
Please cite this report as:
Global Volcanism Program, 1998. Report on Atmospheric Effects (1995-2001) (Wunderman, R., ed.). Bulletin of the Global Volcanism Network, 23:6. Smithsonian Institution.
Atmospheric Effects (1995-2001)
All times are local (unless otherwise noted)
Table 14 lists atmospheric lidar data from Mauna Loa, Hawaii for 2 July 1997 through 21 January 1998, and from Garmisch-Partenkirchen, Germany for 20 April through 24 June 1998. Measurements indicate that the aerosol layer peak location over Hawaii was at a consistently lower elevation in the second half of 1997 (19.2-25.3 km) compared to the second half of 1996 (21.7-28.0 km) (Bulletin v. 22, no. 5). Measurements from Germany showed no significant change compared to earlier in 1998 (Bulletin v. 23, no. 3).
Table 14. Lidar data from Hawaii (July 1997-January 1998) and Germany (April-June 1998) showing altitudes of aerosol layers. Backscattering ratios from Mauna Loa are for the ruby wavelength of 694 nm; those from Garmisch-Partenkirchen are for the Nd-YAG wavelength of 532 nm, with equivalent ruby values in parentheses. Integrated values show total backscatter, expressed in steradians-1, integrated over 300-m intervals from 15.8-33 km for Hawaii, and from the tropopause to 30 km for Germany. Courtesy of John Barnes and Horst Jäger.
| DATE | LAYER ALTITUDE (km) (peak) | BACKSCATTERING RATIO | BACKSCATTERING INTEGRATED |
| Mauna Loa, Hawaii (19.5°N, 155.6°W) | |||
| 02 Jul 1997 | 16-28 (23.8) | 1.26 | 0.69 x 10-4 |
| 11 Jul 1997 | 17-29 (18.4) | 1.50 | 0.72 x 10-4 |
| 16 Jul 1997 | 16-28 (23.2) | 1.26 | 0.78 x 10-4 |
| 23 Jul 1997 | 16-29 (22.9) | 1.31 | 0.97 x 10-4 |
| 01 Aug 1997 | 16-27 (19.9) | 1.23 | 0.55 x 10-4 |
| 06 Aug 1997 | 16-28 (19.5) | 1.37 | 0.98 x 10-4 |
| 14 Aug 1997 | 17-28 (22.3) | 1.30 | 0.67 x 10-4 |
| 21 Aug 1997 | 17-30 (22.6) | 1.24 | 0.54 x 10-4 |
| 27 Aug 1997 | 16-27 (21.4) | 1.31 | 0.89 x 10-4 |
| 03 Sep 1997 | 16-28 (24.7) | 1.24 | 0.62 x 10-4 |
| 10 Sep 1997 | 17-28 (25.3) | 1.28 | 0.67 x 10-4 |
| 17 Sep 1997 | 16-27 (25.3) | 1.25 | 0.80 x 10-4 |
| 22 Oct 1997 | 16-27 (23.5) | 1.26 | 0.83 x 10-4 |
| 07 Nov 1997 | 16-29 (21.4) | 1.20 | 0.68 x 10-4 |
| 12 Nov 1997 | 17-27 (19.9) | 1.18 | 0.85 x 10-4 |
| 06 Dec 1997 | 16-28 (24.1) | 1.28 | 1.18 x 10-4 |
| 19 Dec 1997 | 16-27 (19.6) | 1.28 | 0.95 x 10-4 |
| 24 Dec 1997 | 16-28 (20.2) | 1.27 | 0.99 x 10-4 |
| 07 Jan 1998 | 17-28 (19.2) | 1.50 | 1.00 x 10-4 |
| 16 Jan 1998 | 16-29 (19.3) | 1.41 | 1.33 x 10-4 |
| 21 Jan 1998 | 16-28 (20.8) | 1.61 | 1.27 x 10-4 |
| Garmisch-Partenkirchen, Germany (47.5°N, 11.0°E) | |||
| 20 Apr 1998 | 11-34 (18.5) | 1.06 (1.12) | -- |
| 23 Apr 1998 | 13-30 (19.0) | 1.06 (1.11) | -- |
| 29 Apr 1998 | 11-33 (15.5) | 1.06 (1.13) | -- |
| 07 May 1998 | 14-33 (18.6) | 1.05 (1.10) | -- |
| 11 May 1998 | 13-28 (19.4) | 1.05 (1.09) | -- |
| 14 May 1998 | 12-28 (20.3) | 1.05 (1.10) | -- |
| 20 May 1998 | 12-27 (19.2) | 1.05 (1.10) | -- |
| 30 May 1998 | 11-27 (22.5) | 1.04 (1.08) | -- |
| 09 Jun 1998 | 13-29 (15.8) | 1.05 (1.10) | -- |
| 24 Jun 1998 | 13-30 (19.4) | 1.04 (1.08) | -- |
Information Contacts: John Barnes, Mauna Loa Observatory, P.O. Box 275, Hilo, HI 96720 USA; Horst Jäger, Fraunhofer -- Institut für Atmosphärische Umweltforschung, Kreuzeckbahnstrasse 19, D-82467 Garmisch-Partenkirchen, Germany.
