軌道に関連した長期の気候サイクルが,バイカル湖の12ミリ大陸記録で明らかにされました
K Kashiwaya1, S Ochiai, H Sakai
1Department of Earth Sciences, Kanazawa University, Kakuma, Japan. kashi@kenroku.kanazawa-u.ac.jp
Nature
|March 10, 2001
まとめ
バイカル湖はバイカル湖である.
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
- 地質学 地質学 地質学
- 気候科学 気候科学
背景:
- 陸上の気候記録は,しばしば海洋データと一致する.
- 長期にわたる連続した気候記録 (>100万年) は稀であった.
- バイカル湖は,ユニークな,氷のない,高沈殿性のアーカイブを提供しています.
研究 の 目的:
- 過去1200万年のアジア大陸の内部の気候を再構築する.
- 日焼けと長期的な環境変化の関係を調査する.
主な方法:
- バイカル湖の長い堆積物核の分析.
- 周期的なパターンを特定するためのスペクトル分析.
主要な成果:
- アジア内部の徐々に冷却する傾向が観察されました.
- 冷却傾向内の変動が特定されました.
- スペクトル分析により,ミランコビッチ周期 (400,600,1000 kyr) の可能性があることが示された.
結論:
- インソレーションの変化は,長期的に大陸の気候に大きな影響を与えました.
- バイカル湖は,過去の気候動態を理解するための重要なアーカイブを提供します.
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