A 400‐Year Sediment Record of Tsunamis in Qi'ao Island, Centered at Guangdong‐Hong Kong‐Macao Greater Bay Area

IF 4.6 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Geophysical Research Letters Pub Date : 2025-10-04 DOI:10.1029/2025gl117291

Long Tan, Yang Zhou, Chuanhui Song, Lei Xing, Longhai Zhu, Nan Wang, Yonggang Jia, Zhe Su, Qiang Qiu, Baojin Wu, Cecilia McHugh, Rui Bao

{"title":"A 400‐Year Sediment Record of Tsunamis in Qi'ao Island, Centered at Guangdong‐Hong Kong‐Macao Greater Bay Area","authors":"Long Tan, Yang Zhou, Chuanhui Song, Lei Xing, Longhai Zhu, Nan Wang, Yonggang Jia, Zhe Su, Qiang Qiu, Baojin Wu, Cecilia McHugh, Rui Bao","doi":"10.1029/2025gl117291","DOIUrl":null,"url":null,"abstract":"Identifying tsunamis and determining inundation extent is critical for coastal hazard assessment. We identify potential tsunami deposits in the Guangdong‐Hong Kong‐Macao Greater Bay Area that occurred in 1555 ± 135 CE using a multidisciplinary approach. The inverted 14C ages of organic matter in sediments, consistent dating of shells, and increased coarse‐grained content imply that a rapid, high‐energy event occurred in the Greater Bay Area. The presence of shell fossils, bimodal grain size distributions, the absence of laminar textures, and an increased concentration of the marine‐derived biomarker brassicasterol in the sediment sequence collectively suggest that these sediments are likely deposits from a tsunami. Tsunami simulations further indicate that larger earthquakes from the Manila Trench could be responsible for this tsunami in the Greater Bay Area. Our findings provide preliminary evidence that tsunamis may be a critical natural hazard concern for the densely populated Greater Bay Area.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"1 1","pages":""},"PeriodicalIF":4.6000,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geophysical Research Letters","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1029/2025gl117291","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Identifying tsunamis and determining inundation extent is critical for coastal hazard assessment. We identify potential tsunami deposits in the Guangdong‐Hong Kong‐Macao Greater Bay Area that occurred in 1555 ± 135 CE using a multidisciplinary approach. The inverted 14C ages of organic matter in sediments, consistent dating of shells, and increased coarse‐grained content imply that a rapid, high‐energy event occurred in the Greater Bay Area. The presence of shell fossils, bimodal grain size distributions, the absence of laminar textures, and an increased concentration of the marine‐derived biomarker brassicasterol in the sediment sequence collectively suggest that these sediments are likely deposits from a tsunami. Tsunami simulations further indicate that larger earthquakes from the Manila Trench could be responsible for this tsunami in the Greater Bay Area. Our findings provide preliminary evidence that tsunamis may be a critical natural hazard concern for the densely populated Greater Bay Area.

查看原文本刊更多论文

以粤港澳大湾区为中心的祁岙岛400年海啸沉积记录

识别海啸和确定淹没范围是沿海灾害评估的关键。我们使用多学科方法确定了广东-香港-澳门大湾区发生于1555±135 CE的潜在海啸沉积物。沉积物中有机质14C年龄的倒转、贝壳年代的一致以及粗粒含量的增加表明，大湾区发生了一次快速的高能事件。贝壳化石的存在、双峰粒度分布、层流结构的缺失以及沉积物序列中海洋生物标志物油菜甾醇浓度的增加，共同表明这些沉积物可能是海啸沉积物。海啸模拟进一步表明，来自马尼拉海沟的更大地震可能是这次大湾区海啸的原因。我们的研究结果提供了初步证据，表明海啸可能是人口稠密的大湾区的一个重要自然灾害。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Geophysical Research Letters 地学-地球科学综合

CiteScore

9.00

自引率

9.60%

发文量

1588

审稿时长

2.2 months

期刊介绍： Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.