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海底の分布によって形成された深海の転覆
C de Lavergne1,2, G Madec2, F Roquet3
1School of Mathematics and Statistics, University of New South Wales, Sydney, New South Wales 2052, Australia.
Nature
|November 10, 2017
まとめ
底なしの海
科学分野:
- 海洋学
- 気候科学
- 地理学
背景:
- 地球温暖化と炭素貯蔵に 欠かせない北と南の水流があります
- 底なしの転覆循環の強さと構造は 長期的な気候規制を理解するために不可欠です
研究 の 目的:
- 流通の強さと構造を制御する要因を調査する.
- 海底の地形が半球間水質輸送にどのように影響するかを決定する.
主な方法:
- 南緯32度以北の海底の深度分布の分析
- 歴史的な放射性炭素測定の解釈
- アビサルの水の流れパターンのモデリング.
主要な成果:
- 南緯32度以北の海底の地形は,4km以南に密集した南源水域を北へ向ける.
- これらの水の戻り流は主に2.5km以上で発生します.
- 中間深さ (1-2.5 km) は,北の換気なしで弱い平均南流を示しています.
結論:
- 海流域の幾何学は,深淵の転覆循環を大幅に制限しています.
- 海底の地形は,深淵の水質経路と貯蔵の主要な要因です.
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