インドのモンスーンのホロセンの強制は,オマンの南部のスタラガミットで記録されています
Dominik Fleitmann1, Stephen J Burns, Manfred Mudelsee
1Institute of Geological Sciences, University of Bern, CH-3012 Bern, Switzerland. dominik.fleitmann@geo.unibe.ch
Science (New York, N.Y.)
|June 14, 2003
まとめ
この研究は,オマーンを明らかにしています.
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
- イソトープ地球化学 イソトープ地球化学
- 気候のダイナミクス
背景:
- ホロセーン時代は,大きな気候変化を経験した.
- 過去のモンスーンの変動性を理解することは,将来の気候を予測する上で極めて重要です.
- スタラグミットは,過去の降水量の貴重なアーカイブを提供します.
研究 の 目的:
- 過去10,300年のオマンのモンスーン降雨の歴史を再構築する.
- ホロセンの初期と後半のモンスーンの強さの要因を調査する.
- モンスーンの変動を氷河の境界条件と太陽の活動と相関させるため.
主な方法:
- スタラガミットの高解像度の酸素同位体分析.
- スタラグミットのソリウム-ウラン (Th-U) 年代測定.
- グリーンランドの氷のコアの温度記録と太陽熱のデータとの比較.
主要な成果:
- オマンのモンスーンの降水量は,10.3万年前から0.4万年前 (ky B.P. ) を実施する.
- 初期ホロセンのモンスーンの強度 (B.P.10.38k) グリーンランドの気温と相関しており,氷河の制御を示唆している.
- 後期ホロセンのモンスーンの降水 (8紀元後) 北半球の夏の太陽熱の減少に伴い減少し,太陽活動との関連を示した.
結論:
- 初期のホロセンのモンスーンの動態は,氷河の条件の影響を受けた.
- 太陽の照射の変化は,ホロセンの後半のモンスーンの強度に大きな影響を与えました.
- スタラグミットの酸素同位体は,過去のモンスーンの降雨パターンを再構築するための堅固なプロクシーを提供します.
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