热带地区的弧形大陆碰撞决定了地球的气候状况
Francis A Macdonald1, Nicholas L Swanson-Hysell2, Yuem Park2
1Department of Earth Science, University of California, Santa Barbara, CA 93106, USA. francism@ucsb.edu.
Science (New York, N.Y.)
|March 16, 2019
概括
地球的气候历史以温暖和冰期为特征, 与二氧化碳水平有关. 热带地区的弧形大陆碰撞可能会控制全球气候变化并影响气候变化.
科学领域:
- 古气候学
- 地动力学
- 地质化学
背景情况:
- 几百万年来,地球的气候在温暖,没有冰的时期和寒冷的冰川状态之间波动.
- 这些气候状态之间的转变的驱动因素,特别是二氧化碳来源和沉积点的作用,仍然不清楚.
- 一个假设表明,低度弧形大陆碰撞通过增强化学气候变化增加全球碳捕获,从而促进冷却.
研究的目的:
- 探讨弧形大陆碰撞与地球冰川历史之间的关系.
- 通过碰撞影响全球气候变化是否与气候状态转变相关.
- 评估热带化学气候在长期气候变化的作用.
主要方法:
- 主要法内罗纪洲弧碰撞的古地理位置的重建.
- 碰撞分布与冰盖古度分布的比较.
- 分析由构造和侵蚀过程驱动的全球气候变化.
主要成果:
- 在热带度地区发生的冰川和弧形大陆碰撞之间发现了显著的相关性.
- 这项研究提供了全球气候变化的证据,受这些碰撞位置的影响,是确定地球气候状况的主要因素.
- 热带化学气候变化的速度似乎是长期气候周期的关键调节者.
结论:
- 弧形大陆的碰撞,特别是在热带地区,通过改变全球化学气候效率,在调节地球的长期气候方面发挥着至关重要的作用.
- 这些构造事件的度分布是地球气候状态的主要控制因素,影响了冰川和冰川间的过渡.
- 了解构造气候反对于理解过去的气候变化和潜在的未来气候动态至关重要.
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