14:00 〜 15:15
[ACC31-P01] 地中レーダー（GPR）を用いた立山連峰の5つの多年性雪渓の氷厚観測
キーワード：氷河, 多年性雪渓, 立山, 剱岳, 地中レーダー
We carried out ground penetrating radar (GPR) soundings in the Kuranosuke, the Hamaguri-yuki, the Tsurugisawa, the Chojiro and the Ikenotan-migimata perennial snow patches in the Tateyama Mountains, the northern Japanese Alps since 2012. The Kuranosuke and the Ikenotan-migimata perennial snow patches had large ice masses (>30 m in thickness). We had measured the surface flows of both ice masses since 2011. The maximum surface flows of the Ikenotan-migimata and the Kuranosuke perennial snow patches were about 2 m a-1 and 0.14 m a-1, respectively. Thus, we regard the both snow patches as active glaciers.
The Hamaguri-yuki, the Tsurugisawa and the Chojiro perennial snow patch had thin ice masses (<20 m in thickness). It is possible that these ice masses are not flowing at the present time. Thus, we guess that these snow patches are glacierets rather than active glaciers.
The Hamaguri-yuki, the Tsurugisawa and the Chojiro perennial snow patch had thin ice masses (<20 m in thickness). It is possible that these ice masses are not flowing at the present time. Thus, we guess that these snow patches are glacierets rather than active glaciers.