Dynamics of Langmuir circulation in oceanic surface layers
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Dynamics of Langmuir circulation in oceanic surface layers

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Published by Woods Hole Oceanographic Institution in Woods Hole, Mass .
Written in English

Subjects:

  • Ocean circulation.,
  • Oceanic mixing.

Book details:

Edition Notes

Statementby Anand Gnanadesikan.
SeriesWHOI / Woods Hole Oceanographic Institution -- 94-23., WHOI (Series) -- 94-23.
The Physical Object
Pagination350 p. :
Number of Pages350
ID Numbers
Open LibraryOL15400734M

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The vertical structure of the oceanic surface boundary layer and the role of Langmuir circulation in its evolution have been elucidated by analysis of field observations from the Surface Waves. Enter the password to open this PDF file: Cancel OK. File name: . Until the s, a tacit agreement among many physical oceanographers was that nothing deserving attention could be found in the upper few meters of the ocean. The lack of adequete knowledge about the near-surface layer of the ocean was mainly due to the fact that the widely used oceanographic instruments (such as bathythermographs, CTDs, current meters, etc.) were practically useless in the 4/5(1). S. Leibovich and S. Paolucci, The Langmuir circulation instability as a mixing mechanism in the upper ocean. J. Phys. Ocean. 10, (). CrossRef Google Scholar.

Langmuir circulation within the oceanic mixed layer near-surface layer of the ocean, LANGMUIR () carried out a series of flow visualiza- in the mixed layer and thus whether or not it played a significant role in upper ocean dynamics. More widely accepted was the notion that small scale turbulence was the. Langmuir circulations are coherent structures within the mixed layer that produce counter rotating vortices with axes aligned parallel to the wind. Their surface signature is familiar as windrows: lines of bubbles and surface debris aligned with the wind that mark the convergence zones between the vortices. Abstract Large-eddy simulation of the oceanic mixed layer showed that Langmuir circulation (LC) is weakened under the surface heating and is ultimately broken down if the intensity of the surface heating becomes sufficiently strong. III. Potential Importance of Langmuir Circulation The ocean surface acts as a filter on ocean-atmosphere communication of momentum, energy, and chemical tracers (e.g., C02) and is the region where phytoplankton can grow. As a result, it is important to accurately model and parameterize unresolved scales in this turbulent region. It is.

The oceanic surface mixed layer is a crucial link in coupling the air and sea. The of these dynamics, and one which dominates the observed kinematics, is a pattern Woodcock suggested that oceanic Langmuir circulation may be asymmetric (Woodcock ). . Some evidence for the validity of the parameterization is found, thus drawing attention to Langmuir's assertion that Langmuir circulation is one of the key physical processes in the oceanic boundary layer. The third aspect of surface boundary layer dynamics explored is the mean effect on mixed layer entrainment of periodic vertical movement of isopycnals in the thermocline due to non-breaking internal waves (referred to as heaving). Since the Langmuir circulation is a characteristic phenomenon with a zonal and a circulation cell structure in the sea surface layer (Leibovich ; Thorpe ), Langmuir circulation could. The interaction between wind-driven Langmuir circulation and preexisting stratification is examined in order to elucidate its role in the deepening of the ocean surface mixed layer. For linear stratification, a numerical model suggests that Langmuir cells initially engulf water and create a homogeneous surface layer.