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| Titel |
On the West Atlantic Ocean Equatorial boundary layer |
| VerfasserIn |
A. Rabitti, H. van Haren, T. Gerkema, L. R. M. Maas |
| 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 |
250063599
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| Zusammenfassung |
| The equatorial Ocean shows a different dynamics compared to off-equatorial regions and it
can be therefore interpreted as a boundary layer. It presents a current system that is strongly
coherent in zonal direction and time, constituted by stacked alternating zonal currents known
as Equatorial Deep Jets. Internal wave activity in the equatorial belt is high, and presents
sudden transitions in polarization and mixing properties (van Haren, 2005). Surprisingly,
the causes and feeding mechanisms of these equatorial features are still poorly
understood.
In this work, data collected in a CTD/LADCP transect between 0°and 2°N in the deep West
Equatorial Atlantic Ocean, off the Brazilian coast, are used for a study on non traditional
equatorial geostrophy, where full Coriolis force is taken into account (Gerkema et al., 2008).
For the same area, measurements from a series of one year moored ADCPs and current
meters are also considered, with special attention to the observed internal wave field
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Low latitude dynamics asks for a robust interpretation and in situ measurements as the ones
presented here can provide us with a partial, but direct view of the processes taking place in
this unique region.
Hans van Haren, (2005). Sharp near-equatorial transitions in inertial motions and deep-ocean
step-formation. Geophys. Res. Lett., 32(1), L01605, doi:10.1029/2004GL021630
Theo Gerkema, Zimmermann, J. T. F., Maas, L. R. M., and van Haren, H. (2008).
Geophysical and astrophysical fluid dynamics beyond the traditional approximation. Rev.
Geophys., 46, RG2004, doi:10.1029/2006RG000220 |
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