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<p>Reconstructing coastal paleoenvironments is crucial for understanding paleostorm activity periodicities and predicting future activities. However, in southern China, such studies are in their fragmented stage, and there is a lack of continuous and long-term storm records during the Holocene. Here, we analyze the sedimentary grain size, element geochemistry, carbonate content, coarse fraction weight and accelerator mass spectrometry radiocarbon dates of benthic foraminifera in Core SYW-C from Sanya Bay in southern Hainan Island, to reveal the sedimentary environmental evolution and extreme storm events. Our results revealed that the storm activity has gone through three stages over the past 7200 years in Hainan Island: high-frequency storm activity over the periods of 7.2-4.0&#xa0;ka and 1.2-0&#xa0;ka, and a relatively quiet period from 4.0 to 1.2&#xa0;ka. These three stages of storm activity match well with the sea surface temperature and El Niño-Southern Oscillation (ENSO) patterns in the tropical western Pacific. We suggest that surface water warming of the tropical west Pacific Ocean will likely lead to greater numbers of storms on Hainan Island.</p>

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A 7000-year paleoenvironmental reconstruction and paleostorm activity from Sanya Bay, Hainan Island

  • 期刊论文

  • 发表日期：

    2025年9月24日

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  • Yiping Yang,
  • Rong Xiang,
  • Linggang Tang,
  • Fuchang Zhong

摘要

Reconstructing coastal paleoenvironments is crucial for understanding paleostorm activity periodicities and predicting future activities. However, in southern China, such studies are in their fragmented stage, and there is a lack of continuous and long-term storm records during the Holocene. Here, we analyze the sedimentary grain size, element geochemistry, carbonate content, coarse fraction weight and accelerator mass spectrometry radiocarbon dates of benthic foraminifera in Core SYW-C from Sanya Bay in southern Hainan Island, to reveal the sedimentary environmental evolution and extreme storm events. Our results revealed that the storm activity has gone through three stages over the past 7200 years in Hainan Island: high-frequency storm activity over the periods of 7.2-4.0 ka and 1.2-0 ka, and a relatively quiet period from 4.0 to 1.2 ka. These three stages of storm activity match well with the sea surface temperature and El Niño-Southern Oscillation (ENSO) patterns in the tropical western Pacific. We suggest that surface water warming of the tropical west Pacific Ocean will likely lead to greater numbers of storms on Hainan Island.