Publication Date:
2022-05-25
Description:
Author Posting. © The Author(s), 2009. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Deep Sea Research Part I: Oceanographic Research Papers 56 (2009): 2065-2074, doi:10.1016/j.dsr.2009.06.008.
Description:
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/sec., at the substratum level, in low temperature (4.5 to 16.4°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 flow rates in diffuse flow areas where such a
simple linear flow/temperature relation is shown to dominate.
Description:
The first part of this research was sponsored by a NOAA/NURP grant award #NA96RU0221 and NSF grant OCE-9901563 to MKT and JS. JS was also supported by a FCAR (Quebec) post-doctoral fellowship. The last part of the project was supported through the ANR DEEP OASES
(ANR06 BDV005).
Keywords:
Fluid flow velocity
;
Hydrothermal vent
;
Hot film anemometer
;
Video imagery
;
Diffuse flow
Repository Name:
Woods Hole Open Access Server
Type:
Preprint
Format:
application/pdf
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