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水文学的データから,地球規模の海洋循環,熱伝送,混合の見積もりを改善しました
1MIT, Cambridge, Massachusetts 02139, USA. ganacho@ifremer.fr
Nature
|December 2, 2000
まとめ
海は,熱と栄養素を運ぶことで気候を調節する. 新しいデータとモデリングは,世界の海洋循環パターンと垂直混合を明らかにし,気候変動の研究に重要な参照を提供します.
科学分野:
- 海洋学 海洋学 海洋学
- 気候科学 気候科学
- 地質物理学 地質物理学とは地質物理学です.
背景:
- 海洋は,熱,淡水,栄養素の輸送を通じて,地球気候を調節する上で重要な役割を果たしています.
- 海洋循環経路,メカニズム,および安定性を理解することは,現在の気候状態と将来の変化を評価するために重要です.
- 世界海洋循環実験 (WOCE) は最近,現在の海洋循環をマッピングするために高品質のグローバルな水文データを提供しました.
研究 の 目的:
- グローバルな海洋循環と熱流の見積もりを改善するために.
- イソピクナル表面のグローバル垂直混合を解決するために.
- 定量化された不確実性を持つ気候研究のための新しい基準状態を確立する.
主な方法:
- WOCEからの高解像度トランスオーシャン水文データの統合.
- 現在のメーターデータ,気象学的な風力場,生地化学的バランスの利用.
- 改善された априориエラーの推定値を持つ逆モデルを適用する.
主要な成果:
- グローバル垂直混合係数は (3-12) x 10(-4) m2 s(-1) の範囲で解けました.
- 北大西洋の純深水生産率は (15 +/- 12) x 10 ((6) m3 s ((-1) と推定された.
- 南大洋の純深水生産率は (21 +/- 6) x 10(6) m3 s(-1) と推定された.
結論:
- この研究は,世界の海洋循環と熱流の改善された見積もりを提供します.
- この結果は,将来の気候研究のために,新しい,厳格に定量化された基準状態を提供します.
- 解決された垂直混合と深海の生産率は,気候の調節における海洋の役割の理解を深める.
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