Viðburðir eftir árum


Turbulence (or Mixing) Measurements in the Ocean

Why it's important how it's done, and what we are learning

  • 5.3.2019, 12:30 - 13:30, Háskólinn í Reykjavík

James N. Moum, College of Earth, Ocean and Atmospheric Sciences at Oregon State University,


The circulation of the ocean is fully described by the set of Navier-Stokes equations. The circulation, however, cannot be nearly resolved either in time or space by present computations of these equations. At the smallest scales (the most impossible to solve) exists the most nonlinear components of the fluid dynamics and it is only at these scales that thermodynamic transformation of water masses occurs. Hence it is critical that they be accurately represented (by parameterization) in incomplete computer simulations of ocean fluid dynamics.

To understand the instabilities that lead to turbulence (also mostly unresolved by computer models), the nature of the turbulence and to quantify its effects on the larger scale circulation, extensive measurements are needed. These include shipboard profiling experiments, autonomous platform measurements and long time series measurements obtained from specialized sensors deployed on oceanographic moorings.

In his talk, Moum will graphically summarize the points made above and focus on a few highlights that show what these types of measurements have taught us.

  • Room: V102
  • Date: 5.3.2019
  • Time: 12:30 - 13:30

 

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