Seismic exploration noise reduction in the Marginal Ice Zone.
Seismic exploration noise reduction in the Marginal Ice Zone.
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DOI：
10.1121/1.4885547
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发表时间：
2014-06
期刊：
影响因子：
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通讯作者：
D. Tollefsen;H. Sagen
中科院分区：
文献类型：
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作者：
D. Tollefsen;H. Sagen
2011 年 6 月，在弗拉姆海峡边缘冰区部署了声纳浮标场，以研究环境噪声的空间变化。在 10-200 Hz 处观察到的高噪声水平归因于远距离（1400 公里范围）地震勘探。噪音水平随着进入冰盖的范围而降低；这种减少是通过传播损耗模型来拟合的，该模型的频率相关衰减因子小于北极冰下内部传播的衰减因子。数值模型预测传输损耗与观察到的噪声水平降低程度相同，并表明冰下相互作用造成的显着损耗。
A sonobuoy field was deployed in the Marginal Ice Zone of the Fram Strait in June 2011 to study the spatial variability of ambient noise. High noise levels observed at 10-200 Hz are attributed to distant (1400 km range) seismic exploration. The noise levels decreased with range into the ice cover; the reduction is fitted by a spreading loss model with a frequency-dependent attenuation factor less than for under-ice interior Arctic propagation. Numerical modeling predicts transmission loss of the same order as the observed noise level reduction and indicates a significant loss contribution from under-ice interaction.