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所有海洋都是嘈杂的。北冰洋的噪声发生于冰盖子,特别是其引起断裂的应力状态。由于在北极中潜艇战的战略重要性及石油勘探和开采的经济重要性加速了噪声及冰断裂过程的研究。我在本报告中概述关于理解与冰源力学有关的北冰洋噪声基础方面的新进展。 除开要求噪声的定量观察以外;这里还有几个物理问题,如海冰的流变性质、对冰施加切应力的海洋和大气边界层的本质、及可能会发生断裂的地方的冰盖子的形态特性。冰源力学酷似于地震的地震学和位错运动的声发射,虽然细节上有差别。冰噪声问题的尺度远小于地震的尺度,而远大于位错运动的尺度。
All the oceans are noisy. Arctic noise occurs in ice caps, especially in the stress-induced fracture conditions. Due to the strategic importance of submarine warfare in the Arctic and the economic importance of oil exploration and exploitation, studies of noise and ice fracture processes have been accelerated. In this report, I outline some recent advances in understanding the Arctic noise base relating to ice source mechanics. In addition to the quantitative observations that require noise, there are several physical problems here, such as the rheological properties of sea ice, the nature of the ocean and atmospheric boundary layers that shear stress on ice, and the morphology of ice caps in places where cracking may occur characteristic. Ice source mechanics resembles the seismology of earthquakes and the acoustic emission of dislocation motion, although the details differ. The scale of ice noise problem is much smaller than that of earthquakes and much larger than the scale of dislocation movement.