Accession Number : ADP007366

Title :   Satellite and Slow-Scan Television Observations of the Rise and Dispersion of Ash-Rich Eruption Clouds from Redoubt Volcano, Alaska,

Corporate Author : ALASKA UNIV FAIRBANKS GEOPHYSICAL INST

Personal Author(s) : Kienle, Juergen ; Woods, A. W. ; Estes, S. A. ; Ahlnaes, K.

Report Date : MAR 1992

Pagination or Media Count : 3

Abstract : Polar-orbiting NOAA 10 and 11 weather satellites with their Advanced Very High Resolution Radiometer (AVHRR) imaging sensors and the Landsat 4 and 5 satellites have provided over 30 images of the 1989/90 eruptions of Redoubt Volcano. Between December 14 and April 21, about 20 major explosive eruptions occurred with ash plumes rising to heights of 10 km or more, most of them penetrating the tropopause. The ash severely impacted domestic and international air traffic in Alaska with a near disaster on December 15, 1989, when a KLM 747-400 jet aircraft with 247 people aboard intercepted an ash plume and temporarily lost all four engines. Fortunately, the engines were eventually restarted after several attempts and the plane landed safely in Anchorage. We have used satellite and also slow-scan television (TV) observations to study the dynamics and thermodynamics of rising eruption plumes in order to better understand plume dispersal.

Descriptors :   *TROPOPAUSE, *VOLCANOES, *WEATHER, *DISPERSIONS, *METEOROLOGICAL SATELLITES, AIR, AIR TRAFFIC, AIRCRAFT, ALASKA, ASHES, DISASTERS, DOMESTIC, DYNAMICS, ENGINES, EXPLOSIVES, HIGH RESOLUTION, IMAGES, INTERNATIONAL, JET AIRCRAFT, PLUMES, RESOLUTION, THERMODYNAMICS, TRAFFIC, SYMPOSIA, DETECTORS.

Subject Categories : Geography
      Geology, Geochemistry and Mineralogy
      Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE