同位素证据表明,在特里亚斯纪早期的温暖时期,逆天气增强了逆天气
Sofia Rauzi1, William J Foster2, Satoshi Takahashi3
1Environmental Research Institute, University of Waikato, Tauranga 3110, New Zealand.
概括
在波斯末期的大规模灭绝之后,火山碳释放导致了长期的变暖. 新的研究表明,增强的反向气候变化,二氧化碳来源,延长了这个变暖时期,影响了气候恢复.
科学领域:
- 地质化学 地质化学
- 古气候学 古气候学
- 地球科学 地球科学 地球科学
背景情况:
- 波斯纪末期的大规模灭绝之后,出现了一段异常长的高温时期.
- 这种持续的变暖在显著的碳排放事件后偏离了预期的气候恢复时间表.
- 以前对同位素在纪早期海水中的解释依赖于碳酸盐模型.
研究的目的:
- 为了研究负责Permian末期大规模灭绝后的长期变暖的地球化学机制.
- 重新评估沉积物档案中同位素的解释.
- 在地球上最严重的灭绝事件之后,为增强的反向气候变化提供直接证据.
主要方法:
- 分析了同位素组成的海洋页岩和桃从下三叠纪.
- 较低三叠纪同位素数据与以前测量的法内罗纪海洋页岩的比较.
- 使用一个随机前进的循环模型来模拟同位素趋势.
主要成果:
- 与其他Phanerozoic页岩相比,Triassic下游海洋页岩中的同位素组成明显增加.
- 观察到的同位素记录与现有的基于碳酸盐的早期三叠纪海水解释相冲突.
- 模型模拟表明,增强的逆气候变化是必要的,以解释观察到的同位素数据.
结论:
- 增强的反向气候变化,一个释放二氧化碳的过程,发生在波斯纪末期的大规模灭绝之后.
- 这种增强的反向气候变化导致了长时间的高温,延迟了气候恢复.
- 这项研究需要重新评估同位素在沉积物记录中的解释方式.
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