グリーンランド の 中部 北部 の 現代 の 温度 は,過去 1 千年 の 中 で 最も 暖かい
M Hörhold1, T Münch2, S Weißbach3
1Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany. maria.hoerhold@awi.de.
Nature
|January 18, 2023
まとめ
グリーンランド
科学分野:
- 気候科学
- 氷河学
- 古代気候学
背景:
- グリーンランドの氷床は 地球の気候システムにとって 極めて重要です
- 沿岸の温暖化は観測されているが,中央の氷床の温暖化は長期データが限られているため不明である.
- 既存の氷の核の再構築には 地球温暖化信号を特定する解像度や 最近のデータがありません
研究 の 目的:
- 紀元1000年から2011年までの グリーンランド中部と北部の高解像度の再構築
- グリーンランド中部の最近の温暖化が 工業化以前の自然変動を上回るかどうかを判断する.
- グリーンランドの氷床の中央部に 地球温暖化の影響を調査する
主な方法:
- 高品質のサンプルを得るために,氷のコアを体系的に再掘削する.
- 過去千年 (AD 10002011) をカバーする温度再構築の開発.
- 最近の気温と工業化以前の変動を比較し,傾向を特定するための統計分析.
主要な成果:
- 再構成における最も最近の10年間は,過去千年の変動を高い確実性で上回る温暖化を示している (P < 0.001).
- 最近の気温は20世紀の平均より1.5±0.4°C高い.
- 異常な温暖化は,紀元1800年以降の長期的温暖化傾向に重なった自然の変動に起因する.
結論:
- 人為的な影響は グリーンランド中部と北部に及んでおり 異常な温暖化が示されています
- グリーンランドの全体的な質量損失を 加速させる可能性があります.
- グリーンランドの氷床が 継続的な気候変動に 脆弱であることを強調しています
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