ハインリッヒ・イベント1のハインリッヒ・イベント1の間,アフリカ・アジア・モンスーン地域における悲惨な干ばつ
J Curt Stager1, David B Ryves, Brian M Chase
1Natural Sciences, Paul Smith's College, Paul Smiths, NY 12970, USA. cstager@paulsmiths.edu
Science (New York, N.Y.)
|February 26, 2011
まとめ
16,000~17,000年前,北大西洋に溶けた水の巨大なパルスが,アフリカとアジア全体で深刻な大干ばつを引き起こしました. この気候現象は,旧石器時代の文化とアフリカ・アジアの降雨システムに影響を与えた.
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
- 四次地質学 四次地質学
- 気候科学 気候科学
背景:
- ハインリッヒ・スタディアル1 (15,000〜18,000年前) は,北大西洋に氷と溶けた水の流入を大きく含んでいた.
- この現象は,地域的な冷却と熱帯地域の顕著な気候変化を引き起こしました.
研究 の 目的:
- 熱帯におけるハインリッヒイベント1の気候の影響を調査する.
- この期間にアフリカ・アジアモンスーン地域における干ばつの規模と深刻さを決定する.
- 北大西洋の冷却と熱帯気候の変化との関係を調査する.
主な方法:
- アフリカ・アジアのモンスーン地域からの古気候プロキシデータの分析.
- 過去の海面温度と降雨パターンの再構築.
- 熱帯気候現象と北大西洋の気候変動の相関.
主要な成果:
- ハインリッヒ事件1 (16,000〜17,000年前) は,アフリカ・アジア・モンスーン地域における極端で広範囲にわたる大干ばつと一致した.
- この大干ばつが,過去5万年以上にわたる中で最も深刻だった.
- 発見は,海面の冷却に関連した,アフリカ・アジアの降雨システムのシステム的な弱まりを示唆しています.
結論:
- ハインリッヒ・イベント1の大干ばつは,古石器時代の文化に重大な影響を及ぼす可能性がある.
- 晩四季期の熱帯乾燥は,熱帯間の収束地帯の南へのシフト以上のことを含んでいるかもしれません.
- 北大西洋の海面の冷却は,熱帯の乾燥現象を広範囲に広める上で重要な役割を果たしました.
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