轨道偏心和内部反驱动了特里亚斯纪巨型季风的变化
Runjian Chu1,2, Huaichun Wu3,4,5, Jian Zhang6
1State Key Laboratory of Geomicrobiology and Environmental Changes, China University of Geosciences, Beijing, 100083, China.
Scientific reports
|July 7, 2025
概括
中特里亚斯纪的巨型季风.
科学领域:
- 古气候学 古气候学
- 地球系统科学 地球系统科学
- 轨道动力学 轨道动力学
背景情况:
- 特里亚斯纪巨型季风的演变与地球轨道变化有关.
- 驱动这些轨道规模的季风周期的确切机制尚不清楚.
研究的目的:
- 在三叠纪中期 (246239万年前) 调查轨道规模的巨型季风变异性.
- 将古气候数据与气候模型合成,以了解季风动态.
主要方法:
- 湖泊沉积物 (奥尔多斯盆地) 的水文波动的综合高分辨率重建.
- 使用了石质学和磁性易感性数据系列.
- 采用了气候模拟和数据模型合成.
主要成果:
- 在20,100和405 kyr的米兰科维奇波段中确定了季风周期.
- 揭示了与异常度相关的~3.3 Myr周期,影响季风,温度,碳循环和海平面.
- 地球系统模型展示了轨道配置和二氧化碳对巨型季风动态的影响.
结论:
- 轨道强迫和地球系统的反显著影响长期的巨型季风变化.
- 巨型季风的动态表现出对太阳辐射的值反应.
- 这些发现提高了对古气候模式的天文影响的理解.
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