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首页> 外文期刊>Natural Hazards >Vulnerability of the Atlantic Patagonian coast to tsunamis generated by submarine earthquakes located in the Scotia Arc region. Some numerical experiments
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Vulnerability of the Atlantic Patagonian coast to tsunamis generated by submarine earthquakes located in the Scotia Arc region. Some numerical experiments

机译：位于Scotia Arc地区的海底地震引起的大西洋巴塔哥尼亚海岸地区对海啸的脆弱性。一些数值实验

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摘要

The Scotia Arc is one of two regions in the Atlantic Ocean with greater potential for tsunami generation from seismic and volcanic sources. A numerical modeling study was undertaken to determine tsunami generation from postulated sources along the Arc and tsunami wave amplification or attenuation along the Patagonian continental shelf. Sea level oscillation represented by a simple sinusoidal wave function applied at the boundary of the numerical grid, which simulated the tsunami entering the computational domain, was implemented as forcing. The validation of this model was carried out by comparing the maximum amplitudes recorded and simulated at Santa Teresita and Mar del Plata (Buenos Aires province) after the occurrence of earthquake and subsequent tsunami in Sumatra (December 2004). From numerical simulations it can be seen that the tsunami propagation is highly affected by bathymetric refraction on the Patagonian continental shelf and the wave amplitude is significantly attenuated on the inner continental shelf. Maximum amplifications were obtained around Malvinas (Falkland) Islands and Burdwood bank because the wave propagates almost without refracting and the shoaling effect is highly significant there.
机译：斯科舍弧线是大西洋两大地区之一，其地震和火山爆发海啸的可能性更大。进行了数值模拟研究，以确定沿弧形成的假定海啸源以及沿巴塔哥尼亚大陆架的海啸波放大或衰减。作为强迫，实现了以简单的正弦波函数为代表的海平面振荡，该函数应用在数值网格的边界处，模拟海啸进入计算域。该模型的验证是通过比较地震和随后的苏门答腊海啸（2004年12月）在圣特雷西塔和马德普拉塔（布宜诺斯艾利斯省）记录和模拟的最大振幅来进行的。从数值模拟可以看出，海啸的传播受到巴塔哥尼亚大陆架上测深折射的高度影响，而波幅在大陆架上显着衰减。在马尔维纳斯（福克兰）群岛和Burdwood岸附近获得了最大的放大倍率，因为波几乎没有折射就传播了，浅滩效应在那儿非常重要。

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