南極 と 地球 の 気候 の 歴史 を 氷核 から 見る
Edward J Brook1, Christo Buizert2
1College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, USA. brooke@geo.oregonstate.edu.
Nature
|June 15, 2018
まとめ
温室効果ガスと エアロゾールは 800,000年以上にわたって 地球の気候と結びついています 現在の大気組成は 自然の変動とは異なり 気候変動に関するさらなる研究を促しています
科学分野:
- 古代気候学
- 大気科学
- 気候の動態
背景:
- 氷の核は地球の気候と大気組成の歴史的記録を提供します.
- 過去の気候の変動を理解することは 現在の気候変動の文脈化に不可欠です
研究 の 目的:
- 南極の気候と大気の 800,000年のデータを 分析するために
- 温室効果ガス,エアロゾール,地球温暖化との関係を調査する.
- 南極の気候と 遠くの地理的な場所との関係を 探求するためです
主な方法:
- 過去の大気組成と温度を再構築するための氷核サンプル分析
- 氷の中に閉じ込められた空気泡と同位体比を調べる.
- 氷のコアのデータと他の古気候プロキシの相関.
主要な成果:
- 温室効果ガス,エアロゾール,地球気候の間の強い相関性を様々な時間スケールで示した.
- 南極の気候の動態と 遠い地域の状況との 遠隔接続を明らかにしました
- 自然界の800,000年の記録と比較して 現在の大気組成は前例のない性質を強調しました
結論:
- 過去の気候の変動は 大気成分と地球規模の気候システムとの 複雑なつながりを示しています
- 現在の大気の構成は 過去80万年にわたって観測された 自然の変動範囲を超えています
- 氷の核の記録を拡大し 氷河のサイクルシフトの原動力を理解することを目指しています
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