Preliminary mapping of void fractions and sound speeds in gassy marine sediments from subbottom profiles

Leighton, T.G.; 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). EL313-EL320. 10.1121/1.2993744

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Official URL: http://dx.doi.org/10.1121/1.2993744

Abstract/Summary

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.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1121/1.2993744
ISSN:	0001-4966
Date made live:	04 Feb 2009 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/165180

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1121/1.2993744

ISSN:

0001-4966

Date made live:

04 Feb 2009 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/165180