Scholarlink

<p>Interactions between deep-ocean currents and seafloor sediments create bedforms that are important for paleoenvironment reconstructions, resource exploration, and mapping ecosystems. Oceanographers recognize complex flow dynamics where deep ocean currents interact with submarine topography (i.e. seamounts) however the effects on below-wave base seafloor sediment remain unquantified. Here we show complex, highly variable bedforms in the sediments around a seamount are linked to deep-ocean current and topographic interactions, using in-situ, high-resolution footage from a &lt;10 year-old, 1-km water depth volcanic seafloor. Bedforms record sediment reworking, vary spatially and temporally at the scale of m – 100 s m and reflect changes in current velocity over hours to days. These observations provide insights into the complex sedimentology associated with current-topography interactions in mid- to deep-ocean settings and demonstrates the limitations of existing sedimentological models. This study highlights that primary seafloor data can be quickly obscured, impeding modern data collection, subsequent hazard modelling, and paleoenvironment reconstruction.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

In-situ sedimentary evidence of complex bottom currents at a modern deepwater seamount

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年8月27日

查看全文
  • Shannon E. Frey,
  • Martin Jutzeler,
  • Rebecca J. Carey,
  • Peter T. Harris

摘要

Interactions between deep-ocean currents and seafloor sediments create bedforms that are important for paleoenvironment reconstructions, resource exploration, and mapping ecosystems. Oceanographers recognize complex flow dynamics where deep ocean currents interact with submarine topography (i.e. seamounts) however the effects on below-wave base seafloor sediment remain unquantified. Here we show complex, highly variable bedforms in the sediments around a seamount are linked to deep-ocean current and topographic interactions, using in-situ, high-resolution footage from a <10 year-old, 1-km water depth volcanic seafloor. Bedforms record sediment reworking, vary spatially and temporally at the scale of m – 100 s m and reflect changes in current velocity over hours to days. These observations provide insights into the complex sedimentology associated with current-topography interactions in mid- to deep-ocean settings and demonstrates the limitations of existing sedimentological models. This study highlights that primary seafloor data can be quickly obscured, impeding modern data collection, subsequent hazard modelling, and paleoenvironment reconstruction.