论文标题
深岩浆传输控制爆炸性火山喷发的大小和演变
Deep magma transport control on the size and evolution of explosive volcanic eruptions
论文作者
论文摘要
爆炸性喷发是动态的表面表现，涉及岩浆从岩浆积累的地下区域转移。与不同储层的组成不同岩浆参与的证据不断增加到无数情况下。然而，喷发动力学模型仅考虑管道系统的最高部分，忽略了与岩浆存储更深区域的连接。在这里，我们表明，不同岩浆存储区域之间互连的程度和效率在很大程度上控制着喷发的大小，它们的演变，终止的原因以及最终对周围环境的影响。我们的数值模拟首先重现了地球上爆炸性喷发观察到的幅度强度关系，并解释了观察到的喷发质量流量的变化。由于深层岩浆互连在当今的成像功能上基本上是无法访问的，因此我们的结果意味着基于火山动乱期间的观察结果和测量值对喷发大小进行了限制。
Explosive eruptions are the surface manifestation of dynamics that involve transfer of magma from the underground regions of magma accumulation. Evidence of the involvement of compositionally different magmas from different reservoirs is continuously increasing to countless cases. Yet, models of eruption dynamics consider only the uppermost portion of the plumbing system, neglecting connections to deeper regions of magma storage. Here we show that the extent and efficiency of the interconnections between different magma storage regions largely control the size of the eruptions, their evolution, the causes of their termination, and ultimately their impact on the surrounding environment. Our numerical simulations first reproduce the magnitude-intensity relationship observed for explosive eruptions on Earth and explain the observed variable evolutions of eruption mass flow rates. Because deep magmatic interconnections are largely inaccessible to present-day imaging capabilities, our results imply a limit to eruption size forecasts based on observations and measurements during volcanic unrest.
