izumi_naruse_2002.html
Bulletin of Glaciological Research 19 (2002) 81-84
©Japanese Society of Snow and Ice
Ice avalanche activities at Soler Glacier, northern Patagonia, in the summer of 1998
Kaoru
IZUMI1 and Renji
NARUSE 2
1Research
Institute for Hazards in Snowy Areas, Niigata University,
Niigata, 950-2181 Japan.
2Institute of Low Temperature Science, Hokkaido
University, Sapporo, 060-0819 Japan.
Abstract
At Soler Glacier in northern Patagonia, ice avalanches were observed in daytime during 13 days using video camera recorder. Analysis of frequency and relative size of 659 avalanches recorded indicates that the duration time of almost all the avalanches did not exceed 30 seconds and the number of avalanches decreased sharply with the avalanche size (a lot of small-size and a few of large-size avalanches). It was also indicated that small avalanches often occurred after receiving strong solar radiation, while large avalanches seemed to occur due to the plenty supply of melt water to the base of glacier ice with a time lag from the melting peak.
