植生-大気-海洋の相互作用が,中期ホロセンの気候に及ぼす影響
Ganopolski1, Kubatzki, Claussen
1A. Ganopolski, C. Kubatzki, V. Brovkin, Potsdam-Institut fur Klimafolgenforschung, Postfach 601203, D-14412 Potsdam, Germany. M. Claussen, Potsdam-Institut fur Klimafolgenforschung, Postfach 601203, D-14412 Potsdam, Germany and Institut.
まとめ
ホロセンの半ばの植生の変化は,北半球の太陽熱への気候反応を拡大した. シネージー効果が観察され,フィードバックは緯度によって変化し,海洋循環と地球温暖化に影響を与えました.
科学分野:
- 古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは
- 気候モデリング
- 地球システム科学 地球システム科学
背景:
- ホロセンの中期 (約. 6000年前) は,北半球の太陽照射の変化を経験した.
- 植生覆いは,この期間に著しく変化した.
- 過去の気候の動態を理解することは,将来の気候変動を予測するために極めて重要です.
研究 の 目的:
- ホロセンの半ばの植生の変化が,季節的な太陽光照射の増加に対する気候システムの反応にどのように影響を与えたかを調査する.
- 植生覆いの気候フィードバックへの直接的・間接的な影響を定量化する.
- 気候フィードバックメカニズムにおける緯度変動を分析する.
主な方法:
- シミュレーションのために,同期的に結合された大気-海洋-植生モデルを使用しました.
- ホロセンの中期に焦点を当てて,特定の太陽照射条件を備えたものです.
- 表面アルベド,海洋温度,海氷の覆い,海洋循環の変化を分析した.
主要な成果:
- 植生は直接 (アルベド経由) や間接 (海洋過程経由) に変化し,気候反応が変化し,増幅される.
- 植生,海洋温度,海氷の間の強いシナギスティック効果は北極緯度で発見されました.
- 大気と植物のフィードバックは,亜熱帯地域で最も重要でした.
- 大西洋の熱ハリン循環の減少は南半球の温暖化をもたらした.
結論:
- 植生覆いは,日照の変化に対する気候システムの反応を拡大する重要な要因です.
- 支配的な気候フィードバックメカニズムには緯度差が存在します.
- 熱ハリン循環のように,海洋循環の変化は,温度分布に世界的な影響を及ぼします.
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