火山 は 近く の 氷河 を 阻害 し て いる
Tryggvi Unnsteinsson1, Matteo Spagnolo2, Brice R Rea3
1School of Geosciences, University of Aberdeen, Aberdeen, Scotland, UK. t.unnsteinsson.23@abdn.ac.uk.
Nature communications
|August 29, 2025
まとめ
火山活動が近くの氷河の質量バランスに悪影響を及ぼし,氷河はより高い標高に閉じ込められています. この効果は火山から5km以内の範囲で最も顕著であり,危険性のモニタリングに不可欠です.
科学分野:
- 氷河学
- 火山学
- 地球科学
背景:
- 氷河化した火山は 社会に重大な危険をもたらします
- 火山活動の監視は,氷河の覆面と遠隔性のために困難です.
- 伝統的な地質物理学的および地質化学的方法は,これらの環境でしばしば妨げられます.
研究 の 目的:
- 氷河の質量バランスに対する307の活発な火山の影響を評価する.
- 氷河の上昇と質量バランスに対する火山活動の影響を定量化する.
- 火山と氷河の相互作用の将来的なモニタリングのためのベースラインを確立する.
主な方法:
- 世界中で4万667の氷河の相対的な平均高さの分析.
- 活発な火山の近くにある氷河の高さと,より遠くにある氷河の高さの比較.
- 5kmのフットプリントに焦点を当てて,半径40km以内の火山の影響の評価
主要な成果:
- 火山の近くにある氷河は 徐々に高さまで 閉じ込められています
- 火山の過程は近くの氷河の質量バランスに悪影響を及ぼしている.
- 氷河の質量バランスに対する火山活動の主な影響は,半径5km以内です.
結論:
- 火山活動が 氷河の質量バランスに 大きく影響します
- この発見は 氷河に起る火山の影響を 監視する上で 重要な基準となるものです
- これらの相互作用を理解することは,危険性評価と緩和戦略に不可欠です.
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