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首页> 外文期刊>Oceanography >A Tale of Two Eruptions HOW DATA FROM AXIAL SEAMOUNT LED TO A DISCOVERY ON THE EAST PACIFIC RISE
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A Tale of Two Eruptions HOW DATA FROM AXIAL SEAMOUNT LED TO A DISCOVERY ON THE EAST PACIFIC RISE

机译：两次喷发的故事如何从轴向SEAMOUNT LED到东太平洋上升发现数据

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Mid-ocean ridge volcanism generates two-thirds of the surface of our planet and plays an important role in chemical exchange with the overlying ocean, yet little is known about the dynamic processes involved in mid-ocean ridge eruptions. This is largely due to the costs and challenges of deploying long-term instrumentation on the seafloor, particularly those that transmit data to shore in real time and would allow the scientific community to respond to and coalesce around a particular event. The 2015 eruption at Axial Seamount, which lies along the Juan de Fuca Ridge in the Northeast Pacific Ocean, resulted in the first in situ, real-time geophysical data collected during a mid-ocean ridge eruption. The results provided insights into the caldera fault structure and response to a seafloor-spreading episode, and also confirmed the origin of seismically recorded impulsive signals that are associated with fresh lava erupting onto the seafloor. This confirmation of a seismic signal associated with erupting lava led to revisiting data from an eruption almost a decade earlier and a fundamental new view of seafloor spreading at fast-spreading ridges thousands of kilometers from Axial Seamount. This example illustrates the point that even though cabled observatories are necessarily bound to a specific location, their results can have significant implications for understanding systems that are quite different, in far reaches of the globe.
机译：大洋中脊火山活动占地球表面的三分之二，并且在与上层海洋的化学交换中起着重要作用，但对大洋中脊火山爆发涉及的动力学过程知之甚少。这主要是由于在海底部署长期仪器的成本和挑战所致，尤其是那些将数据实时传输到岸上并允许科学界对特定事件做出响应和合并的仪器。 2015年在东北太平洋的胡安德富卡海岭沿线的轴向海山喷发，导致了在中洋海脊喷发期间收集的第一批原位实时地球物理数据。结果提供了对破火山口断层结构和对海底扩散事件的响应的见解，并且还证实了地震记录的冲动信号的起源，这些信号与新鲜熔岩喷发到海底有关。对与熔岩喷发有关的地震信号的确认导致将近十年前的喷发重新审视了数据，并为从离海轴向山几千公里的快速扩张的山脊扩散的海底面有了新的根本面貌。该示例说明了一点，即使有线观测台必须绑定到特定位置，其结果也可能对理解全球范围内完全不同的系统产生重大影响。

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  • 来源
    《Oceanography》 |2018年第1期|124-126|共3页
  • 作者

    Tolstoy Maya; Wilcock William S. D.; Tan Yen Joe; Waldhauser Felix;

  • 作者单位

    Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA;

    Univ Washington, Sch Oceanog, Sensor Networks, Seattle, WA 98195 USA;

    Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA;

    Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA;

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