フェノスカンディアの樹輪の解剖学は,近代の気候が中世より暖かいことを示している
Jesper Björklund1,2, Kristina Seftigen3,4, Markus Stoffel5,6,7
1Swiss Federal Institute for Forest Snow and Landscape Research WSL, Birmensdorf, Switzerland. jesper.bjoerklund@wsl.ch.
Nature
|August 2, 2023
まとめ
現在のフェノスカンディアの気候は中世より温暖で,樹輪データと気候モデルを調和させています. この研究は,人類による強制を強調しています.
科学分野:
- 古代気候学
- 気候モデリング
- デンドロクロノロジー
背景:
- 地球温暖化は前例のないことですが 樹輪のプロキシは 中世の気候異常気温に関するモデルと矛盾しています
- この不一致は モデルの信頼性や 将来の気候予測に懸念を招く.
研究 の 目的:
- 地域規模での古気候再構築と気候モデルシミュレーションの矛盾を調和させる.
- 地域温暖化における人為的な強制の役割を調査する.
主な方法:
- *Pinus sylvestris*から tracheidの解剖学的測定を用いて,毎年解明された1,170年の樹輪記録を開発しました.
- 暖かい季節の温度変動の高精度測定
主要な成果:
- フェノスカンジ半島の現在の気候は,中世より著しく暖かい.
- 地域規模の気候再構築とモデルシミュレーションを調和させ,人為的な強制を強調した.
結論:
- 人為的な強制は地域気候の温暖化に 主要な役割を果たしています
- 気候変動の理解における不確実性を減らすために,より長期的な,高信頼性の古気候記録の必要性を強調した.
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