On the fate of pumice rafts formed during the 2012 Havre submarine eruption.

On the fate of pumice rafts formed during the 2012 Havre submarine eruption.
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DOI:
10.1038/ncomms4660
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发表时间:
2014-04-22
影响因子:
16.6
通讯作者:
Karlstrom, Leif
Karlstrom, Leif
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Jutzeler, Martin;Marsh, Robert;Carey, Rebecca J.;White, James D. L.;Talling, Peter J.;Karlstrom, Leif

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浮岩筏是低密度浮岩碎屑的漂浮移动的堆积物,由火山喷发产生。筏中的浮石可以漂流数年,被水淹没并下沉,或者搁浅在海岸线上。在这里,我们表明,由令人印象深刻的,深海底喷发的Havre火山(西南太平洋)在2012年7月形成的浮石筏可以通过卫星图像绘制增强帆船船员的意见。远离海岸干扰,火山爆发在1天内产生了一个面积超过400平方公里的木筏,从而启动了一个巨大的,高精度的,与现代和史前海洋表面扩散动力学有关的自然实验。通过使用涡流分辨海洋模型后报的水流模拟漂流和散布模式,可以准确地再现观察到的木筏散布。对于未来的喷发,产生潜在的危险浮石筏,我们的技术允许实时预测的传播路线,除了推断在深海中的灰/浮石存款分布。 浮岩筏是火山喷发进入和进入水中的结果,可能是广泛的和潜在的危险,但跟踪它们的分散是困难的。Jutzeler等人将联合收割机卫星图像和海洋模型相结合,准确预测浮石筏的扩散路线。
Pumice rafts are floating mobile accumulations of low-density pumice clasts generated by silicic volcanic eruptions. Pumice in rafts can drift for years, become waterlogged and sink, or become stranded on shorelines. Here we show that the pumice raft formed by the impressive, deep submarine eruption of the Havre caldera volcano (Southwest Pacific) in July 2012 can be mapped by satellite imagery augmented by sailing crew observations. Far from coastal interference, the eruption produced a single >400 km2 raft in 1 day, thus initiating a gigantic, high-precision, natural experiment relevant to both modern and prehistoric oceanic surface dispersal dynamics. Observed raft dispersal can be accurately reproduced by simulating drift and dispersal patterns using currents from an eddy-resolving ocean model hindcast. For future eruptions that produce potentially hazardous pumice rafts, our technique allows real-time forecasts of dispersal routes, in addition to inference of ash/pumice deposit distribution in the deep ocean. Pumice rafts result from volcanic eruptions into and onto water, and can be extensive and potentially hazardous, but tracking their dispersal is difficult. Jutzeler et al. combine satellite imagery and an ocean model to accurately forecast pumice raft dispersal routes.
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发表时间: 2012-07-18
期刊: PLOS ONE
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