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| Titel |
Computation of a new mean dynamic topography for the Mediterranean Sea from model outputs, altimeter measurements and oceanographic in situ data |
| VerfasserIn |
M.-H. Rio, A. Pascual, P.-M. Poulain, M. Menna, B. Barceló, J. Tintoré |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 10, no. 4 ; Nr. 10, no. 4 (2014-08-18), S.731-744 |
| Datensatznummer |
250117045
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| Publikation (Nr.) |
 copernicus.org/os-10-731-2014.pdf |
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| Zusammenfassung |
| The accurate knowledge of the ocean's mean dynamic topography (MDT) is a
crucial issue for a number of oceanographic applications and, in some areas of
the Mediterranean Sea, important limitations have been found pointing to the
need of an upgrade. We present a new MDT that was
computed for the Mediterranean Sea. It profits from improvements made
possible by the use of extended data sets and refined processing. The updated
data set spans the 1993–2012 period and consists of drifter velocities,
altimetry data, hydrological profiles and model data. The methodology is
similar to the previous MDT by Rio et al. (2007). However, in Rio et al. (2007)
no hydrological profiles had been taken into account. This required the
development of dedicated processing. A number of sensitivity studies have
been carried out to obtain the most accurate MDT as possible. The main
results from these sensitivity studies are the following: moderate impact to
the choice of correlation scales but almost negligible sensitivity to the
choice of the first guess (model solution). A systematic external validation
to independent data has been made to evaluate the performance of the new MDT.
Compared to previous versions, SMDT-MED-2014 (Synthetic Mean Dynamic Topography
of the MEDiterranean sea) features shorter-scale
structures, which results in an altimeter velocity variance closer to the
observed velocity variance and, at the same time, gives better Taylor skills. |
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