北部の高緯度におけるエオセーンからオリゴセーンへの移行を通して季節性の増加
James S Eldrett1, David R Greenwood, Ian C Harding
1Shell Exploration and Production UK Ltd, 1 Altens Farm Road, Nigg, Aberdeen, AB12 3FY, UK. james.eldrett@shell.com
Nature
|June 19, 2009
まとめ
地球の気候は33.5百万年前に温室状態から氷室状態に移った. 新しいデータは,南極の氷床の成長の前に,北極で顕著な冷却と季節性の増加を明らかにしています.
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
- 気候変動科学 気候変動科学
- パレオボタニーは古植物学です.
背景:
- エオセーン・オリゴセーン移行期 (約. 3350万年前) は,温室状態から氷室状態への主要な世界的な気候変化を象徴しました.
- この時期には南極の氷床が膨張し,北半球の氷河が形成され,軌道の変化と大気中のCO2の減少によって引き起こされた.
- 以前の古気候学の研究は矛盾するデータを提示し,高緯度の気候の動態は十分に理解されていない.
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