グリーンランドの気候,植生,氷の量は,過去100万年にわたって自然に変化してきた
Anne de Vernal1, Claude Hillaire-Marcel
1GEOTOP Geochemistry and Geodynamics Research Center-Université du Québec à Montréal, Case Postale 8888, succursale Centre-Ville, Montréal, Québec H3C 3P8, Canada. devernal.anne@uqam.ca
まとめ
グリーンランド グリーンランド
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
- 氷河学 氷河学とは
- 気候変動科学 気候変動科学
背景:
- グリーンランドの氷床が地球温暖化に与える反応は,海面上昇に極めて重要です.
- 過去の氷床の動態を理解することで,将来の気候変動の影響についての洞察が得られます.
研究 の 目的:
- グリーンランドの氷床の自然の脆弱性を評価する.
- 過去のグリーンランドの植生と氷床の広がりを再構築するために.
- 氷床の振る舞いの気候モデルの予測を検証するために.
主な方法:
- グリーンランドの南西沖の海洋堆積物コアからの花粉記録の分析.
- 過去の植生の変化の再構築 過去100万年.
- 気候モデルのシミュレーションと古生態学的データの比較.
主要な成果:
- 花粉データによると,グリーンランドの植生は過去100万年にわたって大きく変化しています.
- 証拠によると,グリーンランドの氷床の量は,最後の氷河間期に減少したことを示している.
- 北極の針葉樹林は,約40万年前 (海洋同位体11期) にグリーンランド南部に存在していた.
結論:
- グリーンランドの氷床は温暖化に自然に脆弱である.
- 過去の間の氷河期は,氷床の減少の可能性を示しています.
- これらの発見は,減少した氷の覆いの下での生態系動態を理解するための時間的枠組みを提供します.
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