Underwater noise from glacier calving: Field observations and pool experiment
Underwater noise from glacier calving: Field observations and pool experiment
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DOI：
10.1121/10.0001494
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发表时间：
2020-07-01
影响因子：
2.4
通讯作者：
Glowacki, Oskar
中科院分区：
文献类型：
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作者：
Glowacki, Oskar
通过在冰川湾和模型池中进行的声学和摄影观测，研究了冰川崩解的水下噪声发射。确定了这两种设置中碰撞噪声的相似之处。声音的产生涉及不同的流体动力学过程：冰山分离、水进入、气泡云的夹带和集体振荡、飞溅引起的二次撞击和产犊引起的波浪作用。初始影响和气泡羽夹断从地下腔之间的滞后取决于冰块的尺寸和下降的高度，并可能是有用的，在减少使用水下声音的产犊通量的估计误差。
The underwater noise emission from glacier calving is investigated by integrating acoustic and photographic observations made in a glacial bay and model pool. Similarities in the impact noise in these two settings are identified. Distinct fluid-dynamics processes are involved in sound generation: iceberg detachment, water entry, entrainment and collective oscillation of a bubble cloud, secondary impacts due to splashes, and calving-induced wave action. The lag between initial impact and bubble plume pinch-off from the subsurface cavity depends on ice block dimensions and drop height and may be useful in reducing errors in estimates of calving fluxes made using underwater sound.