Preliminary mapping of void fractions and sound speeds in gassy marine sediments from subbottom profiles
Preliminary mapping of void fractions and sound speeds in gassy marine sediments from subbottom profiles
Bubbles of gas (usually methane) in marine sediments affect the load-bearing properties of the seabed and act as a natural reservoir of “greenhouse” gas. This paper describes a simple method which can be applied to historical and future subbottom profiles to infer bubble void fractions and map the vertical and horizontal distributions of gassy sediments, and the associated sound speed perturbations, even with single-frequency insonification. It operates by identifying horizontal features in the geology and interpreting any perceived change of depth in these as a bubble-mediated change in sound speed.
EL313-EL320
Leighton, T.G.
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
Robb, G.B.N.
ed4a87a1-b924-4d6b-af46-597d8fd3b642
15 October 2008
Leighton, T.G.
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
Robb, G.B.N.
ed4a87a1-b924-4d6b-af46-597d8fd3b642
Leighton, T.G. and Robb, G.B.N.
(2008)
Preliminary mapping of void fractions and sound speeds in gassy marine sediments from subbottom profiles.
Journal of the Acoustical Society of America, 124 (5), .
(doi:10.1121/1.2993744).
Abstract
Bubbles of gas (usually methane) in marine sediments affect the load-bearing properties of the seabed and act as a natural reservoir of “greenhouse” gas. This paper describes a simple method which can be applied to historical and future subbottom profiles to infer bubble void fractions and map the vertical and horizontal distributions of gassy sediments, and the associated sound speed perturbations, even with single-frequency insonification. It operates by identifying horizontal features in the geology and interpreting any perceived change of depth in these as a bubble-mediated change in sound speed.
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Published date: 15 October 2008
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Local EPrints ID: 65180
URI: http://eprints.soton.ac.uk/id/eprint/65180
ISSN: 0001-4966
PURE UUID: 50f5265a-fd91-40e3-9d1d-361753e8b547
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Date deposited: 04 Feb 2009
Last modified: 16 Mar 2024 02:44
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Author:
G.B.N. Robb
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