Autonomous spar-buoy measurements of bubble populations under breaking waves in the Sea of the Hebrides

Coles, D.G.H. and Leighton, T.G. (2007) Autonomous spar-buoy measurements of bubble populations under breaking waves in the Sea of the Hebrides. In, Papadakis, J.S. and Bjorno, L. (eds.) Proceedings of the Second International Conference on Underwater Acoustic Measurements, Technologies and Results. 2nd International Conference & Exhibition on "Underwater Acoustic Measurements: Technologies & Results" Southampton, UK, Institute of Sound and Vibration Research, 543-548.


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An understanding of the evolution of bubble clouds under breaking waves in
rough at-sea conditions is important for assessing the role of such wave-generated activity
on climatologically important processes. These processes include the fluxes between
atmosphere and ocean of mass, heat and momentum. This paper describes the
development and testing of sensors for an experiment which forms the first stage in a
project to combine at-sea measurements and modelling to elucidate bubble cloud
evolution and its role in the above fluxes. It was undertaken as a component of DOGEE
(Deep Ocean Gas Exchange Experiment), which in turn is part of UK SOLAS (Surface-
Ocean / Lower-Atmosphere Study) funded by the UK Natural Environment Research
Council. Sensors are mounted along the length of an 11 m autonomous spar buoy, which
was deployed off RRS Discovery. The upper part of the buoy, which protruded above the
ocean surface, and was equipped with downward-looking video which monitored wave
activity, a feature also monitored using capacitive wave wires. Below the surface, bubble
populations and size distributions were measured using acoustic sensors. The data are to
be compared with a model for the evolution of wave-generated bubble clouds to estimate
gas transport and flux.

Item Type: Book Section
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Keywords: bubbles, atmosphere/ocean gas flux, underwater acoustics, ocean waves
Subjects: Q Science > Q Science (General)
T Technology > TA Engineering (General). Civil engineering (General)
G Geography. Anthropology. Recreation > GC Oceanography
Divisions : University Structure - Pre August 2011 > Institute of Sound and Vibration Research > Fluid Dynamics and Acoustics
ePrint ID: 49414
Accepted Date and Publication Date:
Date Deposited: 12 Nov 2007
Last Modified: 31 Mar 2016 12:26

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