ゴルフストリームによる生地化学輸送
Richard G Williams1, Peter J Brown2, Yohei Takano3
1Department of Earth, Ocean and Ecological Sciences, School of Environmental Sciences, University of Liverpool, Liverpool, UK.
まとめ
湾岸流は"生地化学流"として機能し,栄養価の高い,炭素が少ない水を亜極圏に運ぶ. このプロセスは大気中の炭素吸収を高めるが,気候変動は,この重要な海洋の炭素吸収を弱める可能性がある.
科学分野:
- 海洋学 海洋学とは
- 気候科学 気候科学
- バイオジオケミストリー バイオジオケミストリー
背景:
- 湾岸流は,熱伝送と空気と海の交換を通じて気候に大きな影響を与えます.
- 海洋の炭素循環におけるその役割はあまり理解されていない.
- この研究は,湾岸流が海水源として果たす役割を調査しています.
- バイオジオケミカルストリーム
- 栄養素と人為的な炭素を輸送する.
研究 の 目的:
- 炭素循環における湾岸流の役割を調査する.
- 栄養が豊富で炭素が乏しい水の輸送を理解するために.
- このプロセスに対する気候変動の影響を評価する.
主な方法:
- ゴルフストリーム内の粒子の動きを追跡するためにモデル実験を活用しました.
- 異なる深さや場所での粒子の放出をシミュレートした.
- 接続性の時間スケールを決定するために,感度実験を実施しました.
主要な成果:
- 地表の下の湾岸流の水は,海底海流を形成しています.
- バイオジオケミカルストリーム
- 高い栄養素と低い人為的な炭素を運ぶ.
- 密度の高い層の粒子は亜極圏に移動し,表面の粒子は亜熱帯に留まります.
- 密度の高い上流水域と亜極圏の渦巻との接続は4〜8年で発生します.
結論:
- ほら,ほら,ほら,ほら
- バイオジオケミカルストリーム
- 亜極圏の大気中の炭素排出量を増加させる.
- 気候変動は,これらの水の供給を減少させ,北大西洋の炭素吸収を弱めると予測されています.
- 湾流は,海洋の炭素バランスを調節する上で重要な役割を果たしています.
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