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The relation between the statistics of open ocean currents and the temporal correlations of the wind
 

Summary: The relation between the statistics of open ocean currents and the temporal
correlations of the wind
Golan Bel1,
and Yosef Ashkenazy1,
1
Department of Solar Energy and Environmental Physics,
Blaustein Institutes for Desert Research,
Ben-Gurion University of the Negev, Sede Boqer Campus 84990, Israel
Abstract
We study the statistics of wind-driven open ocean currents. Using the Ekman layer model for the inte-
grated currents, we investigate, analytically and numerically, the relation between the wind distribution and
its temporal correlations and the statistics of the open ocean currents. We find that temporally long-range
correlated wind results in currents whose statistics is proportional to the wind-stress statistics. On the other
hand, short-range correlated wind leads to Gaussian distributions of the current components, regardless of
the stationary distribution of the winds, and therefore, to a Rayleigh distribution of the current amplitude
if the wind stress is isotropic. An interesting result is the existence of an optimum in the amplitude of the
ocean currents as a function of the correlation time of the wind stress. The results were validated using an
oceanic general circulation model.
PACS numbers: 92.60.Cc, 91.10.Vr, 88.05.Np, 92.60.Gn
1

  

Source: Ashkenazy, Yossi "Yosef" - Department of Solar Energy and Environmental Physics, Jacob Blaustein Institutes for Desert Research,Ben-Gurion University of the Negev

 

Collections: Physics; Environmental Management and Restoration Technologies