意大利 Stromboli 三次喷发对照实验：实验室模型高估火山流海啸规模
A. Bougouin 与合作者在《Journal of Geophysical Research: Oceans》发表研究，首次将实验室实验与真实火山观测直接对照，研究火山流引发海啸的预报。研究对象是意大利 Stromboli 岛火山，该火山近乎持续喷发，火山流经常入海并形成海啸，并有陆基相机与近海波浪计组成的监测系统记录。
研究团队聚焦2019年至2021年间三次触发海啸的 Stromboli 喷发，将观测与已有及新做的实验室实验比较。实验室中使用一条长7米、宽20厘米的水槽，释放聚苯乙烯珠沿模拟 Stromboli 山坡的斜面滚入水中，以代表火山碎屑流。
研究发现，实验室实验不能直接放大用于预测真实事件，多数基于这些实验的模型高估实地海啸规模。新实验再现了在 Stromboli 观测到的三波列形态等关键特征，并大致捕捉了从流体到波列的能量传递。研究团队称，这是改进火山海啸危害评估的第一步，仍有限制。
Three Stromboli Eruptions in Italy Compared With Lab Experiments: Models Overestimate Volcanic-Flow Tsunami Size
A. Bougouin and colleagues published a study in the Journal of Geophysical Research: Oceans that made the first direct comparison between laboratory experiments and field observations of volcanic-flow tsunamis. The study volcano was Stromboli Island, Italy, which erupts nearly constantly, with volcanic flows frequently entering the sea and forming tsunamis, recorded by a monitoring system of land-based cameras and offshore wave gauges.
The researchers focused on three Stromboli eruptions that triggered tsunamis between 2019 and 2021, comparing observations with results from existing and newly conducted laboratory experiments. In the lab, the team used a 7-metre-long, 20-centimetre-wide channel filled with water and released polystyrene beads down a slope designed to replicate Stromboli's flank, representing pyroclastic flows.
The researchers found that lab experiments cannot be directly scaled up to predict real-world events and that most models based on these experiments overestimate the size of tsunamis in the field. The new experiments reproduced key features observed at Stromboli, including a three-wave pattern, and broadly captured the energy transfer from the flow to the resulting wave train. The team said the work is an initial step toward improving volcanic tsunami hazard assessment, with some limitations remaining.
来源：《地球物理研究杂志·海洋》
发布：GSM·美国（发布链接）
图片来源：图中是意大利 Stromboli 火山的一次喷发，该火山是本研究对照观测的对象。来源：Wikimedia Commons, File:Stromboli Eruption.jpg, Wolfgang Beyer, CC BY-SA 3.0。
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