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Proceedings Paper

Volcanic plumes at Miyakejima observed from satellites and from the ground
Author(s): Kisei Kinoshita; Chikara Kanagaki; Naoko Iino; Megumi Koyamada; Akihiko Terada; Andrew Craig Tupper
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Paper Abstract

The eruption of Miyakejima volcano started on 8 July 2000. As of September 2002, SO2 emissions measured by COSPEC average 11000 t/day. As the volcanic gas tends to behave together with the plume, we may infer the advection of the gas from the observation of the plume. Ground observations have been performed from Mikurajima using CCD cameras since September 2000. These pictures clarify the vertical structure of volcanic clouds. The horizontal dispersion of the clouds is well shown in NOAA/AVHRR, Terra/MODIS and other satellite images. Ash-rich clouds at the first stage are well detected by the difference image of NOAA/AVHRR 5 and 4, while vapor-rich clouds are insensitive to the difference. Instead, the latter are detected by the difference of AVHRR 1 and 2, and discriminated well from meteorological clouds in many cases. MODIS data is sensitive to the ash and sulfates of Miyakejima plumes in the 8.6 mm channel, and can detect the fine structure of the plumes with its high-resolution visible channels. Miyakejima plumes contain large quantities of volcanic gases, and their daily monitoring using satellites and ground observations in conjunction with upper wind data helps to understand high concentration events of sulfur dioxide downstream from the volcano.

Paper Details

Date Published: 9 April 2003
PDF: 10 pages
Proc. SPIE 4891, Optical Remote Sensing of the Atmosphere and Clouds III, (9 April 2003); doi: 10.1117/12.466783
Show Author Affiliations
Kisei Kinoshita, Kagoshima University (Japan)
Chikara Kanagaki, Kagoshima Univ. (Japan)
Naoko Iino, Kagoshima Univ. (Japan)
Megumi Koyamada, Kagoshima Univ. (Japan)
Akihiko Terada, Univ. of Tokyo (Japan)
Andrew Craig Tupper, Bureau of Meteorology (Australia)
Monash University (Australia)
Kagoshima University (Japan)

Published in SPIE Proceedings Vol. 4891:
Optical Remote Sensing of the Atmosphere and Clouds III
Hung-Lung Huang; Daren Lu; Yasuhiro Sasano, Editor(s)

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