南ヨーロッパにおける森林段階の持続時間と,氷期間の気候の変動性
P C Tzedakis1, K H Roucoux, L de Abreu
1Earth and Biosphere Institute, School of Geography, University of Leeds, Leeds, LS2 9JT, UK. P.C.Tzedakis@leeds.ac.uk
まとめ
過去の氷河期間の期間は著しく変化し,気候変動の後に森林の回復が常に起こらない. 軌道周期だけでなく,ミレニアム変動は,氷河間の長さを制御し,将来の気候予測を複雑にする可能性があります.
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
- 海洋地質学 海洋地質学
- パリノロジーはパリノロジーです.
背景:
- 過去の氷河間期間を理解することは,将来の気候変動を予測するために不可欠です.
- 軌道理論は,間氷期のタイミングを概して説明しますが,特定の長さは説明できません.
研究 の 目的:
- 過去35万年にわたる温帯段階の持続時間の変動を分析する.
- 氷河期間の気候の変動,森林覆い,メタンのレベルとの関係を調査する.
主な方法:
- 深海の沈殿物の酸化酸素同位体分析のために.
- 海洋堆積物核の花粉分析. 海洋堆積物核の花粉分析.
- 大気中のメタン記録との相関.
主要な成果:
- 過去35万年における温和期 (氷河間期) の期間における大きな変動.
- 低氷量期間の森林収縮が観察され,メタンの減少と一致しています.
- いくつかの気候現象の後,森林集団の不完全な回復.
結論:
- 軌道強制は,間氷期の一般的なタイミングと一致しますが,それらの特定の期間は,千年スケールの気候変動の影響を受けます.
- この変動性の予測不可能な性質は,天然の氷期間の長さの予測を複雑にする.
- 気候予測を改善するために,ミレニアム気候変動の起源に関するさらなる研究が必要である.
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