A dual sensor device to estimate fluid flow velocity at diffuse hydrothermal vents

Type Article
Date 2009-11
Language English
Author(s) Sarrazin JozeeORCID1, Rodier Philippe1, Tivey M. K.2, Singh H.2, Schultz A.3, Sarradin Pierre-MarieORCID1
Affiliation(s) 1 : IFREMER, Ctr Brest, Dept Etud Ecosyst Profonds, Lab Environm Profond, F-29280 Plouzane, France.
2 : Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA.
3 : Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA.
Source Deep Sea Research Part I: Oceanographic Research Papers (0967-0637) (Elsevier), 2009-11 , Vol. 56 , N. 11 , P. 2065-2074
DOI 10.1016/j.dsr.2009.06.008
WOS© Times Cited 22
Keyword(s) Diffuse flow, Video imagery, Hot film anemometer, Hydrothermal vent, Fluid flow velocity
Abstract Numerous attempts have been made over the last thirty years to estimate fluid flow rates at hydrothermal vents, either at the exit of black smoker chimneys or within diffuse flow areas. In this study, we combine two methods to accurately estimate fluid flow velocities at diffuse flow areas. While the first method uses a hot film anemometer that performs high-frequency measurements, the second allows a relatively rapid assessment of fluid flow velocity through video imagery and provides in situ data to calibrate the sensor. Measurements of flow velocities on hydrothermal diffuse flow areas were obtained on the Mid-Atlantic Ridge (MAR). They range from 1.1 to 4.9 mm/s at the substratum level, in low-temperature (4.5-16.4 degrees C) diffuse flow areas from the Tour Eiffel sulfide edifice. A strong correlation was observed between fluid flow velocities and temperature, supporting the possible use of temperature as a proxy to estimate the flow rates in diffuse flow areas where such a simple linear flow/temperature relation is shown to dominate.
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