在过去的三个冰川周期中,东南极洲的气候变化均
O Watanabe1, J Jouzel, S Johnsen
1National Institute of Polar Research, 9-10 Kaga 1-chome, Itabashi-ku, Tokyo 173, Japan.
Nature
|April 4, 2003
概括
来自冰芯的南极气候记录在整个东南极高原基本上是统一的. 来自富士山顶的新数据证实了与沃斯托克发现的类似的冰川期和冰川间气候变化,支持大规模的气候重建.
科学领域:
- 古气候学 古气候学
- 冰川学的冰川学
- 气候科学 气候科学
背景情况:
- 冰芯研究表明,南极的气候变化可能因地区而异.
- 之前发现的气候不均的发现仅限于罗斯海部门.
- 这就提出了关于大规模气候记录的有效性的问题,比如沃斯托克的记录.
研究的目的:
- 为了研究南极洲东部南极洲的气候同质性.
- 为了比较Dome Fuji冰芯记录与Vostok记录.
- 评估南极古气候数据的空间代表性.
主要方法:
- 在东南极洲的Dome Fuji钻了一个冰芯.
- 分析了富士圆顶冰芯的同位素组成.
- 我们比较了富士圆顶的同位素形状与过去三个冰川周期的沃斯托克冰芯记录.
主要成果:
- 富士山和沃斯托克的记录显示了主要气候事件 (终结,冰川间,冰川间) 的惊人相似之处.
- 微妙的冰川事件也在两个记录之间保持一致,即使考虑到降水起源.
- 数据涵盖了过去三个冰川周期,提供了实质性的时间比较.
结论:
- 南极的气候基本上是东南极高原的一致的.
- 这种同质性可能是由于高原和周围海洋的对称性.
- 这些发现支持从东南极冰芯进行的大规模气候重建的有效性.
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