在海平面上升期间模拟未来的悬崖前海浪,以及对沿海悬崖退缩率的影响
H Matsumoto1, M E Dickson2, W J Stephenson3
1Scripps Institution of Oceanography, University of California San Diego, San Diego, USA. himatsumoto@ucsd.edu.
Scientific reports
|April 2, 2024
概括
未来的海平面上升 (SLR) 会以复杂的方式影响沿海悬崖波浪动态. 对于某些悬崖类型而言,波浪能量可能会减少,这挑战了沿海悬崖撤退中均加速的假设.
科学领域:
- 沿海的地形形态.
- 海洋学 海洋学 海洋学
- 气候变化影响气候变化的影响.
背景情况:
- 沿海悬崖的撤退通常被认为会随着海平面上升而加速 (SLR).
- 单反相机对悬崖前波动力学的影响,对于侵蚀至关重要,是研究不足的.
- 破浪给悬崖带来更多的能量,而不是破浪或不破浪.
研究的目的:
- 在未来的海平面上升场景下模拟悬崖前面的波浪动态.
- 为了研究不同的岸上平台几何如何影响波浪类型和能量.
- 评估加速沿海悬崖退缩的可能性.
主要方法:
- 开发和应用一个简单的数值模型.
- 模拟悬崖前的波数和类型 (破碎,破碎,不破碎).
- 包括来自美国,新西兰和英国的六个不同的悬崖平台配置文件.
- 使用后预测/预测波浪数据和三个未来的SLR场景 (2013年至100年).
主要成果:
- 对于高海拔的悬崖平台交叉点,破浪和破浪的发生通常会增加.
- 对于低海拔,近水平的平台,在高SLR下,破裂/破裂波的发生率显著降低 (38-92%).
- 在高SLR下的低海拔平台上,不间断波的发生率达到96-97%.
- 波对SLR的反应高度依赖于岸上平台的几何形状.
结论:
- 悬崖前海浪对海平面上升的反应是复杂而不均的.
- 未来的沿海悬崖退缩率可能不会因波动力学的不同反应而同质地加速.
- 岸上平台的几何是调节波浪冲击在未来的单反相机下的一个关键因素.
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