Marine Geophysics

Study of hydrothermal plume transport range in a stratified background

  • YE Feng ,
  • BAO Yun
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  • Department of Mechanics, Sun Yet-Sen University, Guangzhou 510275, China

Received date: 2015-11-24

  Online published: 2016-09-22

Supported by

Foundation item: National Natural Science Foundation of China (11372362); Strategic Priority Research Program of the Chinese Academy of Sciences (XDA11030302)

Abstract

The seafloor hydrothermal system plays an important role in exchanges of both thermal energy and chemical components between the ocean and Earth crust, which has revolutionized our understanding of deep- sea biological processes. The hydrothermal system in the temperature background stratification was simulated by an axisymmetric model. Simulation results showed that because the plume continued to entrain fluid, the temperature decreased, the plume overshot to the maximum plume rise height in the stratified environment eventually. The plume’s vertical velocity decreased as the plume rose in its center area. Our results also suggested that the maximum plume rise height and plume’s radius at the bottom agreed with the MTT theory. Over time, a laterally spreading intrusion developed above 50 m. In 0-50 m, the plume’s radius remained unchanged. At 1.39 hours, the plume’s radius was less than 30 m; at 100.00 hours, it become 150 m.

Cite this article

YE Feng , BAO Yun . Study of hydrothermal plume transport range in a stratified background[J]. Journal of Tropical Oceanography, 2016 , 35(5) : 97 -102 . DOI: 10.11978/2015142

References

1 BAKER E T, LAVELLE J W, FEELY R A, et al, 1989. Episodic venting of hydrothermal fluids from the Juan de Fuca Ridge[J]. Journal of Geophysical Research, 94(B7): 9237-9250.
2 FEELY R A, BAKER E T, MARUMO K, et al, 1996. Hydrothermal plume particles and dissolved phosphate over the superfast-spreading southern East Pacific Rise[J]. Geochimica et Cosmochimica Acta, 60(13): 2297-2323.
3 GERMAN C R, VON DAMM K L, 2006. Hydrothermal processes[M]//HOLLAND H D, TUREKIAN K K. Treatise on geochemistry, volume 6. 2nd ed. Amsterdam: Elsevier Ltd, 181-222.
4 JIANG HOUSHUO, BREIER J A, 2014. Physical controls on mixing and transport within rising submarine hydrothermal plumes: a numerical simulation study[J]. Deep Sea Research Part I: Oceanographic Research Papers, 92: 41-55.
5 KAYE N B, SCASE M M, 2011. Straight-sided solutions to classical and modified plume flux equations[J]. Journal of Fluid Mechanics, 680: 564-573.
6 KELLEY D S, KARSON J A, BLACKMAN D K, et al, 2001. An off-axis hydrothermal vent field near the Mid-Atlantic Ridge at 30° N[J]. Nature, 412(6843): 145-149.
7 KÜHN M, 2004. Reactive flow modeling of hydrothermal systems[M]. Berlin Heidelberg: Springer, 103.
8 LAVELLE J W, DI IORIO D, RONA P, 2013. A turbulent convection model with an observational context for a deep-sea hydrothermal plume in a time-variable cross flow [J]. Journal of Geophysical Research: Oceans, 118(11): 6145-6160.
9 MARTIN W, BAROSS J, KELLEY D, et al, 2008. Hydrothermal vents and the origin of life[J]. Nature Reviews Microbiology, 6(11): 805-814.
10 MORTON B R, TAYLOR G, TURNER J S, 1956. Turbulent Gravitational Convection from Maintained and Instantaneous Sources[J]. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 234(1196): 1-23.
11 MORTON B R, 1959. Forced plumes[J]. Journal of Fluid Mechanics, 5(1): 151-163.
12 RESING J A, SEDWICK P N, GERMAN C R, et al, 2015. Basin-scale transport of hydrothermal dissolved metals across the South Pacific Ocean[J]. Nature, 523(7559): 200-203.
13 SCASE M M, CAULFIELD C P, DALZIEL S B, 2006. Boussinesq plumes and jets with decreasing source strengths in stratified environments[J]. Journal of Fluid Mechanics, 563: 463-472.
14 SPEER K G, 1997. Thermocline penetration by buoyant plumes[J]. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 355(1723): 443-458.
15 TAO Y, ROSSWOG S, BRÜGGEN M, 2013. A simulation modeling approach to hydrothermal plumes and its comparison to analytical models[J]. Ocean Modelling, 61: 68-80.
16 WOODS A W, CAULFIELD C-C P, 1992. A laboratory study of explosive volcanic eruptions[J]. Journal of Geophysical Research, 97(B5): 6699-6712.
17 WOODS A W, 2010. Turbulent plumes in nature[J]. Annual Review of Fluid Mechanics, 42(1): 391-412.
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