Computer Science – Sound
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003adspr..32.2191s&link_type=abstract
Advances in Space Research, Volume 32, Issue 11, p. 2191-2199.
Computer Science
Sound
Scientific paper
On January 2, 1996 two eruption clouds from Karymsky volcano group in Kamchatka Peninsula were detected in the imageries of VISSR (Visible and Infrared Spin Scan Radiometer) aboard the fifth Japanese Geostationary Meteorological Satellite, GMS-5. The cloud drifting ENE was brighter than that drifting SSE in the imagery of visible channel. The ENE cloud was recognizable in the infrared imagery, while the SSE cloud was not. Although ash-bearing eruption cloud is generally discriminated in the imagery of DTII (Differential Thermal Infrared Imaging) made from the data of two infrared window channels of GMS-5 VISSR, the ENE cloud was not discriminated with DTII. The data of in situ and radio sounding observations revealed that the height of the ENE cloud was around 6.3 km above sea level and originated from the crater in the Karymskoe Lake side, containing abundant ice particles, while the height of the SSE cloud was around 2.7 km above sea level. This eruption cloud was from the crater near the summit of the volcano, containing abundant ash (silicate glass). The directions of the eruption clouds coincided with those of the prevailing winds at the cloud heights. It is considered that, although the ENE cloud contained abundant ash, the radiative characteristics of the ash was greatly reduced by ice coating on ash particles. The advantage of DTII is rather reduced in the cold area due to the low temperature of the Earth's surface.
Sawada Yoshihiro
Tsuchiya Kiyoshi
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