大気中のCO2のケノゾイク史へ
, Bärbel Hönisch1,2, Dana L Royer3
1Department of Earth and Environmental Sciences of Columbia University, New York, NY, USA.
まとめ
過去の大気中の二酸化炭素 (CO2) レベルを再構築することは,異なるパレオプロキシ法により困難である. この研究は高精度CO2記録を作成し,過去より高い地球のシステムの感度とCO2を明らかにしました
科学分野:
- 古代気候学
- 地化学
- 古生物学
背景:
- 地質学的記録は,気候,大気中の二酸化炭素 (CO2) と進化の変化を結びつけています.
- 過去のCO2の再構築は,さまざまな仮定と不確実性を有するパレオプロキシに依存しています.
研究 の 目的:
- 大気中のCO2に関する利用可能な古文書を批判的に評価し,分類し,統合する.
- 高精度で透明な二酸化炭素記録を 過去6600万年にわたって構築する
- 過去の地球システムの感受性とCO2の値についてより明確な証拠を提供するためです.
主な方法:
- 大気中の二酸化炭素を再構成するための様々なパレオプロキシの体系的な評価と分類.
- 選択されたプロキシを統合し,統一された高精度CO2データセットを作成します.
- 統合されたCO2記録の時系列調整と不確実性評価
主要な成果:
- 過去6600万年の CO2の 透明な記録です
- 過去の地質学的な時代における 地球システムの高い感度を示す.
- 生物学的および冷気圏の進化に影響を与える重要なCO2値の特定.
結論:
- 統合されたCO2記録は,気候とCO2の動態に関するより良い洞察を提供します.
- 過去の気候ダイナミクスは 現在観測されているよりも 敏感な地球系を示唆しています
- CO2レベルは 過去の生物学的および冷凍的変化を形作る上で重要な役割を果たしました
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