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| Titel |
The relation between the statistics of open ocean currents and the temporal correlations of the wind |
| VerfasserIn |
G. Bel, Y. Ashkenazy |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250068716
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| Zusammenfassung |
| We study the statistics of wind-driven open ocean currents. Using
the Ekman layer model for the integrated 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. |
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