初期エオセンのメタン誘発による極地温暖化の可能性
L C Sloan1, J C Walker, T C Moore
1Department of Geological Sciences, University of Michigan, Ann Arbor 48109-1063.
Nature
|May 28, 1992
まとめ
初期のエオセンの極地の温暖化は,メタンの排出量の増加によって説明される可能性がある. この強力な温室効果ガスは地球温暖化を助長し,平流圏の氷の雲を通して極地の冷却を防ぐことができた.
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
- 大気化学 大気化学
背景:
- 初期エオセンの気候再構築では,極地や海洋が暖かく,希少な氷が降っていることが示されています.
- 熱帯海面の気温は,現在の気温に似ていたか,それよりも低かった.
- 重要な熱帯温暖化なしの極地温暖化のメカニズムはまだ解明されていない.
研究 の 目的:
- 初期エオセンの気候におけるメタン排出の役割を調査する.
- 暖かい極と冷たい熱帯のパラドックスを解消するために.
主な方法:
- 初期エオセンの湿地地域の分析.
- 高濃度のメタンが地球と極地の気候に与える影響をモデル化.
主要な成果:
- 推定では,エオセーン時代にメタンの流量が大幅に増加したことを示唆している.
- メタンの濃度の上昇は,初期のエオセンの地球温暖化を促進した可能性が高い.
- メタンは,平流圏の氷の雲を促進することによって,極地冬の冷却を防止した可能性がある.
結論:
- メタンの排出量の増加は,初期のエオセンの極地の温暖化に対する妥当な説明を提供している.
- 質層圏の氷雲形成におけるメタンの役割は,極地気候の調節の鍵である.
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