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风暴浪可能是一些“海啸”海岸巨石沉积物的来源。

Storm Waves May Be the Source of Some "Tsunami" Coastal Boulder Deposits.

作者信息

Kennedy Andrew B, Cox Rónadh, Dias Frédéric

机构信息

Department of Civil & Environmental Engineering & Earth Sciences University of Notre Dame Notre Dame IN USA.

Geosciences Department Williams College Williamstown MA USA.

出版信息

Geophys Res Lett. 2021 Jun 16;48(11):e2020GL090775. doi: 10.1029/2020GL090775. Epub 2021 Jun 7.

DOI:10.1029/2020GL090775
PMID:34219828
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8243979/
Abstract

Coastal boulder deposits (CBD) provide what are sometimes the only remaining signatures of wave inundation on rocky coastlines; in recent decades, CBD combined with initiation of motion (IoM) analyses have repeatedly been used as primary evidence to infer the existence of ancient tsunamis. However, IoM storm wave heights inferred by these studies have been shown to be highly inaccurate, bringing some inferences into question. This work develops a dimensionless framework to relate CBD properties with storm-wave hindcasts and measurements, producing data-driven relations between wave climate and boulder properties. We present an elevation-density-size-inland distance-wave height analysis for individual storm-transported boulders which delineates the dynamic space where storm-wave CBD occur. Testing these new relations against presumed tsunami CBD demonstrates that some fall well within the capabilities of storm events, suggesting that some previous studies might be fruitfully reexamined within the context of this new framework.

摘要

海岸巨石沉积物（CBD）有时提供了岩石海岸线上波浪淹没的唯一剩余特征；在最近几十年里，CBD与运动起始（IoM）分析相结合，多次被用作推断古代海啸存在的主要证据。然而，这些研究推断的IoM风暴浪高度已被证明高度不准确，这使得一些推断受到质疑。这项工作建立了一个无量纲框架，将CBD属性与风暴浪后报和测量联系起来，得出波浪气候与巨石属性之间的数据驱动关系。我们对单个风暴搬运的巨石进行了高程-密度-尺寸-内陆距离-浪高分析，描绘了风暴浪CBD发生的动态空间。将这些新关系与假定的海啸CBD进行对比测试表明，有些完全在风暴事件的能力范围内，这表明一些先前的研究可能在这个新框架的背景下得到有益的重新审视。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd44/8243979/76c9ae554fe2/GRL-48-e2020GL090775-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd44/8243979/cc6ea33b4cb3/GRL-48-e2020GL090775-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd44/8243979/43a4cdb854d3/GRL-48-e2020GL090775-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd44/8243979/653f184f89f0/GRL-48-e2020GL090775-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd44/8243979/76c9ae554fe2/GRL-48-e2020GL090775-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd44/8243979/cc6ea33b4cb3/GRL-48-e2020GL090775-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd44/8243979/43a4cdb854d3/GRL-48-e2020GL090775-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd44/8243979/653f184f89f0/GRL-48-e2020GL090775-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd44/8243979/76c9ae554fe2/GRL-48-e2020GL090775-g001.jpg

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本文引用的文献

1
Millennial scale maximum intensities of typhoon and storm wave in the northwestern Pacific Ocean inferred from storm deposited reef boulders.从风暴沉积的珊瑚巨石推断出西北太平洋千年尺度上的台风和风暴浪最大强度。
Sci Rep. 2020 Apr 29;10(1):7218. doi: 10.1038/s41598-020-64100-6.
2
Giant boulders and Last Interglacial storm intensity in the North Atlantic.北大西洋的巨型卵石和末次间冰期风暴强度。
Proc Natl Acad Sci U S A. 2017 Nov 14;114(46):12144-12149. doi: 10.1073/pnas.1712433114. Epub 2017 Oct 30.
3
Local amplification of storm surge by Super Typhoon Haiyan in Leyte Gulf.
台风“海燕”在莱特湾造成的风暴潮局部放大效应。
Geophys Res Lett. 2014 Jul 28;41(14):5106-5113. doi: 10.1002/2014GL060689. Epub 2014 Jul 25.