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| Titel |
Intense mesoscale variability in the Sardinia Sea |
| VerfasserIn |
Aniello Russo, Ines Borrione, Silvia Falchetti, Michaela Knoll, Heinz-Volker Fiekas, Karen Heywood, Paolo Oddo, Reiner Onken |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250102429
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| Publikation (Nr.) |
 EGU/EGU2015-1745.pdf |
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| Zusammenfassung |
| From the 6 to 25 June 2014, the REP14-MED sea trial was conducted by CMRE, supported
by 20 partners from six different nations. The at-sea activities were carried out onboard the
research vessels Alliance (NATO) and Planet (German Ministry of Defense), comprising a
marine area of about 110 x 110 km2 to the west of the Sardinian coast. More than 300 CTD
casts typically spaced at 10 km were collected; both ships continuously recorded vertical
profiles of currents by means of their ADCPs, and a ScanFish® and a CTD chain were
towed for almost three days by Alliance and Planet, respectively, following parallel
routes. Twelve gliders from different manufacturers (Slocum, SeaGliderTM and
SeaExplorer) were continuously sampling the study area following zonal tracks spaced at
10 km. In addition, six moorings, 17 surface drifters and one ARVOR float were
deployed.
From a first analysis of the observations, several mesoscale features were identified in the
survey area, in particular: (i) a warm-core anticyclonic eddy in the southern part of the
domain, about 50 km in diameter and with the strongest signal at about 50-m depth (ii)
another warm-core anticyclonic eddy of comparable dimensions in the central part of the
domain, but extending to greater depth than the former one, and (iii) a small (less than 15 km
in diameter) cold-core cyclonic eddy of Winter Intermediate Water in the depth range
between 170 m and 370 m. All three eddies showed intensified currents, up to 50 cm s-1. The
huge high-resolution observational data set and the variety of observation techniques enabled
the mesoscale features and their variability to be tracked for almost three weeks.
In order to obtain a deeper understanding of the mesoscale dynamic behaviour
and their interactions, assimilation studies with an ocean circulation model are
underway. |
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