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Updated: Feb 25, 2026

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アマゾンの森林伐採は,アトランティック・ニニオの変動性を弱めている.
Shengbiao Wei1,2,3, Chunzai Wang1,2,3, Wenju Cai4,5
1State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.
Nature communications
|February 23, 2026
まとめ
アマゾンの森林伐採は,1970年以来,アトランティックニニョの変動を23%弱めた. この土地利用の変化は,熱帯大西洋の熱的コントラストを変化させ,海洋-大気動力学と気候パターンに影響を与えます.
科学分野:
- 地球システム科学 地球システム科学
- 気候のダイナミクス
- 海洋学 海洋学 海洋学
背景:
- アマゾン流域は,1970年代以降,森林伐採が大きく,生態学的,気候的な影響をもたらしています.
- アトランティック・ニニョのような熱帯の海洋と大気結合の変動性に対するこの森林破壊の具体的な影響は,依然として十分に理解されていません.
研究 の 目的:
- アマゾンの森林破壊が,アトランティック・ニニョの変動の弱まりに及ぼす影響を調査する.
- 熱帯大西洋の気候動態の観測された変化に対する森林伐採の寄与を定量化するために.
主な方法:
- アトランティックニニョの変動性と関連する気候変数の動向を分析するために観測データセットを使用しました.
- 森林伐採が海洋と大気の相互作用に及ぼす影響をシミュレートするために,標的型カップリングされた一般循環モデル実験を実施しました.
主要な成果:
- アマゾンの森林伐採は,1970年以来,アトランティックニニョの変動の弱まりに約23%の貢献をしてきた.
- 森林伐採による局所的な温暖化と乾燥は,半球間の熱的コントラストを高め,赤道横断風を強くする.
- このプロセスは,大西洋ニニオの変動を駆動する重要なメカニズムであるBjerknesフィードバックを弱める.
結論:
- アマゾンの陸地表面の変化は,熱帯の結合された海洋-大気系に重大な影響を及ぼします.
- 森林伐採は,熱帯大西洋の気候の変動を調節する上で重要な役割を果たし,地域的,そして潜在的にグローバルな気候パターンに影響を及ぼします.
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