過去の気温は,グリーンランドの氷床から直接得られたものです
Dahl-Jensen1, Mosegaard, Gundestrup
1D. Dahl-Jensen, K. Mosegaard, N. Gundestrup, S. J. Johnsen, A. W. Hansen, Niels Bohr Institute for Astronomy, Physics and Geophysics, Department of Geophysics, Juliane Maries Vej 30, DK-2100 Copenhagen OE, Denmark. G. D. Clow, USGS-Climate Program,
Science (New York, N.Y.)
|October 9, 1998
まとめ
研究者たちはグリーンランドを再建した.
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
- 氷河学 氷河学とは
- 地質物理学 地質物理学とは地質物理学です.
背景:
- 氷の芯は,過去の気候条件の貴重なアーカイブを提供します.
- 過去の気温変動を理解することは,将来の気候変動を予測する上で極めて重要です.
研究 の 目的:
- グリーンランドの2つの氷の掘削孔から,長期的な気温の歴史を再構築するために.
- グリーンランドの過去の気候現象と変動を分析する.
主な方法:
- 採掘穴の温度プロフィールデータにモンテカルロ逆法の適用.
- グリーンランド・アイス・コア・プロジェクト (GRIP) とDye 3の掘削孔からの温度データの分析.
主要な成果:
- GRIPサイトのために,5万年の温度史が再構築されました.
- Dye 3のサイトでは,7,000年の気温の歴史が再構築されました.
- 最後の氷河期最大期と中世の温暖期を含む主要な気候時期は,異なる温度幅で識別されました.
- 染料3はGRIPの1.5倍以上の温度幅を示し,より高い局所的な気候の変動性を示した.
- GRIPサイトでの陸上の熱流密度は51.3mW/m2で計算されました.
結論:
- 掘削孔温度計と逆の方法により,グリーンランドの過去の温度を確実に再構築できます.
- グリーンランドは,過去5万年にわたって,著しい気温変動を経験しました.
- 地域的な気候の変動はグリーンランド全体で異なっており,Dye 3ではより高い変動が観察されています.
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