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在热带西太平洋地区的冰川间气候通过晚期普莱斯托时代
A N Meckler1, M O Clarkson, K M Cobb
1Geological and Planetary Science Department, California Institute of Technology, Pasadena, CA, USA. nele.meckler@erdw.ethz.ch
概括
热带水气候在冰河间保持稳定,这表明它可以根据强迫作用稳定或放大气候变化. 这影响了对过去气候动态的理解.
科学领域:
- 古气候学 古气候学
- 气候科学 气候科学
- 四年纪地质学四年纪地质学
背景情况:
- 大气中的二氧化碳 (P(CO(2))) 和南极温度在43万年前左右发生了变化.
- 这些变化的全球气候影响尚未完全理解.
研究的目的:
- 重建热带西太平洋水气候从570到210ka.
- 研究热带水气候对冰川间气候变化的敏感性.
主要方法:
- 基于斯塔拉格米特的古气候重建.
- 对热带西太平洋水气候变化的分析.
主要成果:
- 热带降雨在四个冰河间周期中是一致的.
- 热带水气候对间冰期P ((CO ((2)) 和高度温度变化表现出不敏感.
- 热带西太平洋的干燥与北方高度的冰川终结期间的降温相吻合.
结论:
- 热带对流热发动机可以作为气候稳定器或放大器.
- 水气候反应取决于气候强迫的性质.
- 提供了冰川 - 间冰川周期期间热带气候动态的见解.
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