Seismic exploration noise reduction in the Marginal Ice Zone | Zendy

Dag Tollefsen | Zendy; Hanne Sagen | Zendy

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Seismic exploration noise reduction in the Marginal Ice Zone

Author(s) -

Dag Tollefsen,

Hanne Sagen

Publication year - 2014

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.4885547

Subject(s) - geology , attenuation , transmission loss , noise (video) , ambient noise level , range (aeronautics) , noise reduction , arctic , arctic ice pack , environmental science , seismology , acoustics , geomorphology , oceanography , materials science , sound (geography) , physics , optics , composite material , artificial intelligence , computer science , image (mathematics)

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.

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