北大西洋の放射性炭素貯蔵庫の変化は,アレルード・ドライアスと若いドライアスにおける年齢による
Stein Bondevik1, Jan Mangerud, Hilary H Birks
1Department of Geology, University of Tromsø, N-9037 Tromsø, Norway. stein.bondevik@ig.uit.no
まとめ
ノルウェーの海洋貝殻と植物遺跡の放射性炭素年代測定は,若いドライアス (YD) 気候イベントの間に海面貯水池の年齢の変化を明らかにします. 貯水池の年齢は著しく変動し,気候記録の相関関係に影響を与えました.
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,古代気候学 (paleoclimatology) とは
- 放射性炭素年代測定法による年代測定
- マリン・ジオケミストリー (海洋地化学)
背景:
- 海水の正確な放射性炭素年代測定は,四季期の終わりから海洋と陸の気候記録を相関させるのに不可欠です.
- ユング・ドライアス (Younger Dryas,YD) は,大きく急激に気候が変化した時期であり,古気候の研究には正確な年齢推定が必要であった.
研究 の 目的:
- 海面貯水池の年齢を定めるために,四次期の終わり,特に若いドライアス (YD) 寒冷期の周りに.
- ノルウェーの西海岸の海殻と陸上の植物の残骸における放射性炭素年代の変動性を評価する.
主な方法:
- 海洋貝殻と陸上の植物の遺骸の放射性炭素年代測定.
- ノルウェーの2つの湾に1万1千年から1万4千年前に堆積したサンプルを分析した.
- 貯水池の年齢を計算するために,海洋と陸上のサンプル間の放射性炭素年齢の比較.
主要な成果:
- 海面貯水池の年齢は,YD初期に400年から600年に増加しました.
- 貯水池の年齢は,約900年間安定していました.
- 貯水池の年齢の300年の減少は,YD-Holocene移行の1世紀以内に発生しました.
結論:
- 海面貯水池の年齢の大きな変動は,YDとHoloceneへの移行の間に発生しました.
- これらの年齢の変動は,海洋と陸の気候記録の相関の複雑さを強調しています.
- これらの貯水池の年齢変化を理解することは,四季期の気候再構築を精錬するために不可欠です.
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