iizuka_2004.htm
Bulletin of Glaciological Research 21 (2004)
91-96
©Japanese Society of Snow and Ice
Water surface waves induced by calving events at Perito Moreno Glacier, southern Patagonia
Yasuko IIZUKA1, Shun’ichi KOBAYASHI2 and Renji NARUSE3
1 The Graduate University for Advanced Studies (SOUKEN), National Institute of Polar Research, Tokyo 173-8515, Japan
2 Research Institute for Hazards in Snowy Areas, Niigata University, Niigata 950-2181 Japan
3 Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan
Abstract
In order to investigate characteristics of water surface waves, induced by calving events of Perito Moreno Glacier, a water pressure gauge was set at the shore of proglacial Lake Brazo Rico for a period from 2 to 13 December 1999. Continuous measurements of lake level show that the diurnal number of calving events is not related to temporal variations of air temperature, but that the hourly event number on the day weakly depends on the temperature rise. The spectral analysis for lake level revealed that surface waves are strong mostly at ca. 0.02 Hz and secondly at ca. 0.04 Hz. These frequencies probably correspond to inherent frequencies of surface seiche in the proglacial lake.
