过去的温度直接来自格陵兰冰盖
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,
概括
研究人员重建了格陵兰岛.
科学领域:
- 古气候学 古气候学
- 冰川学的冰川学
- 地质物理学 地质物理学
背景情况:
- 冰芯提供了过去气候状况的宝贵档案.
- 了解过去的温度变化对于预测未来的气候变化至关重要.
研究的目的:
- 为了从两个格陵兰冰钻孔中重建长期温度历史.
- 分析格陵兰岛过去的气候事件和变化.
主要方法:
- 应用蒙特卡洛反向方法对钻井温度资料数据的应用.
- 来自格陵兰冰芯项目 (GRIP) 和Dye 3钻井的温度数据的分析.
主要成果:
- 为GRIP站点重建了5万年的温度历史.
- 对于Dye 3站点来说,重建了7000年的温度历史.
- 关键的气候时期包括最后的冰川最大值和中世纪的温暖被确定为不同的温度幅度.
- 染料3的温度幅度是GRIP的1.5倍,这表明当地的气候变化更高.
- 在GRIP地点的陆地热流密度计算为51.3mW/m2.
结论:
- 钻孔温度计和反向方法可以可靠地重建过去的格陵兰岛温度.
- 在过去的5万年里,格陵兰经历了显著的温度波动.
- 格陵兰地区的气候变化不同,在Dye 3观察到的变化更高.
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