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| Titel |
Observed temporal correlations between mesoscale currents and near inertial wave and non-wave motions in the World Ocean |
| VerfasserIn |
Dhouha Ferjani, Rob Scott |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250086904
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| Publikation (Nr.) |
 EGU/EGU2014-846.pdf |
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| Zusammenfassung |
| Motions in the near-inertial band are not all internal gravity waves. Here we use polarization
relations, especially rotary spectrum, applied to 3500 current meter records, representing
41,000 months of data, throughout the World Ocean to differentiate motions that are
consistent or not with linear internal waves. A remarkable contrast was found between
the wave and the non-wave components’ temporal correlation with respect to the
monthly mean currents. The near-inertial internal wave energy was found to be weakly
anticorrelated with the mesoscale energy while the near-inertial non-wave motion was
significantly correlated with the monthly mean currents. The counter-rotating two
near-inertial components were also positively correlated to each other. A simple stochastic
model with white-noise forcing and linear coupling between the monthly mean and
two near-inertial components was constructed and used to explain the observed
correlations. |
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