Generation of Hydroacoustic Waves by an Oscillating Ice Block in Arctic Zones

• Published in: Advances in Acoustics and Vibration
• Main Author: Kadri, Usama
• Other Authors: Massachusetts Institute of Technology. Department of Mathematics
• Format: Article in Journal/Newspaper
• Language: English
• Published: Hindawi Publishing Corporation 2016
• Subjects: Arctic
• Online Access: http://hdl.handle.net/1721.1/103895

The time harmonic problem of propagating hydroacoustic waves generated in the ocean by a vertically oscillating ice block in arctic zones is discussed. The generated acoustic modes can result in orbital displacements of fluid parcels sufficiently high that may contribute to deep ocean currents and circulation. This mechanism adds to current efforts for explaining ocean circulation from a snowball earth Neoproterozoic Era to greenhouse earth arctic conditions and raises a challenge as the extent of ice blocks shrinks towards an ice-free sea. Surprisingly, unlike the free-surface setting, here it is found that the higher acoustic modes exhibit a larger contribution.