在整个全新世纪,东亚出现了反复出现的双极洪水模式
Qili Xiao1, Duo Wu1, Weiyi Sun2
1MOE Key Laboratory of Western China's Environmental Systems, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China.
Science bulletin
|January 31, 2026
概括
中国的全新世纪洪水显示了黄河和长江之间的双极模式,受厄尔尼诺和大西洋南部翻转循环 (AMOC) 变化的影响. 这种理解对于未来的洪水风险管理至关重要.
科学领域:
- 古气候学 古气候学
- 水文学的水文学
- 气候动力学 气候动力学
背景情况:
- 在中国东部季风中洪水的频率和分布在全新纪期间尚不清楚.
- 这个地区人口密集,因此洪水风险管理至关重要.
- 长期的洪水模式对于有效的减灾战略至关重要.
研究的目的:
- 为了重建黄河和长江盆地的大洪水的历史,在全新世纪.
- 在中国东部季风中识别全新纪洪水的时空模式和周期性.
- 为了研究观测到的洪水模式背后的气候驱动因素.
主要方法:
- 用黄河和长江流域的代理记录重建大洪水历史.
- 对整个全新世纪的千年级洪水周期性进行分析.
- 气候模型模拟以了解厄尔尼诺,大西洋南部翻转循环 (AMOC) 和太阳活动对洪水模式的影响.
主要成果:
- 显而易见的证据表明,黄河北部和长江南部流域之间存在着持续的双极洪水模式.
- 在整个全新纪中,确定了大约1.0ka (1000年) 的周期性.
- 长江洪水与强烈的厄尔尼诺现象相关,因AMOC减弱而受到调节.
- 黄河洪水在太阳最大值期间达到顶峰,受到类似拉尼娜的背景状态的影响.
结论:
- 千年规模的气候动态,包括AMOC和太阳周期,显著影响中国东部地区的洪水模式.
- 未来AMOC的减弱可能会加剧厄尔尼诺现象,增加中国南部的洪水风险.
- 将长期气候动态纳入适应战略对于未来的洪水风险管理至关重要.
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