表面データの逆転によって見られる氷流床の摩擦抵抗の規則的なパターン
Olga V Sergienko1, Richard C A Hindmarsh
1Program in Atmospheric and Oceanic Sciences, Princeton University, 201 Forrestal Road. Princeton, NJ 08540, USA.
まとめ
南極大陸のパイン・アイランドとスワイツ氷河を調査すると,高基礎剪定ストレスの肋骨のようなパターンが明らかになる. 氷床下水は,これらのパターンに影響を与え,接地線に潜在的に影響を与える可能性があります.
科学分野:
- 氷河学 氷河学とは
- 南極の氷床のダイナミクス
- 地質物理学 地質物理学とは地質物理学です.
背景:
- 急速に流れる氷河と氷河の流れは,南極から氷の流出に不可欠です.
- パイン・アイランドとスワイツの氷河は,加速したペースで質量を失っている.
- 氷の排出は,氷床の接点にある条件によって制御されます.
研究 の 目的:
- パイン・アイランドとスワイツ氷河の下の基礎切断ストレス分布を計算するために.
- 氷の排出速度を制御する要因を調査する.
主な方法:
- 高解像度データセットを使用しました.
- ベーススイアストレスを計算するために,標準の逆行法を適用しました.
- 基礎切断ストレスと水力ポテンシャルとの関係を分析した.
主要な成果:
- 非常に高い基礎切断ストレスの肋骨のようなパターンを特定しました.
- これらの高ストレスの領域は,ゼロベーススイアストレスのより大きな領域内に観察されました.
- 水力ポテンシャルの高いグラデーションを持つ高シールストレスのコロケーションが見つかりました.
結論:
- 亜氷河水は,高基礎スチールストレス肋骨の進化を制御する可能性があります.
- 接地線付近の基礎抵抗の変化は,亜氷河水の影響を受けることがあります.
- このメカニズムは,グラウンドラインの移行につながる可能性があります.
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