日本地球惑星科学連合2014年大会

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セッション記号 A (大気海洋・環境科学) » A-CC 雪氷学・寒冷環境

[A-CC31_29AM2] 雪氷学

2014年4月29日(火) 11:00 〜 12:45 312 (3F)

コンビーナ:*鈴木 啓助(信州大学理学部物質循環学科)、兒玉 裕二(国立極地研究所)、座長:兒玉 裕二(国立極地研究所)

12:30 〜 12:45

[ACC31-P01_PG] 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

ポスター講演3分口頭発表枠

*福井 幸太郎1飯田 肇1 (1.富山県立山カルデラ砂防博物館)

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.