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| Titel |
Modelling the impact of atmospheric and terrestrial inputs on the Black Sea coastal dynamics |
| VerfasserIn |
V. H. Kourafalou, E. V. Stanev |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 19, no. 2 ; Nr. 19, no. 2, S.245-256 |
| Datensatznummer |
250014207
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| Publikation (Nr.) |
 copernicus.org/angeo-19-245-2001.pdf |
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| Zusammenfassung |
The dynamics on the North
Western Shelf area of the Black Sea are examined, with an emphasis on the
circulation induced by buoyancy due to the land drained fresh waters and by the
interaction with the atmosphere, notably wind stress. A three-dimensional,
multi-layer hydrodynamic model is employed with realistic topography and
parameterisation of river plume physics. We focus on the seasonal patterns of
transport of the river induced low-salinity waters within the Coastal Low
Salinity Band and the conditions that influence their removal toward the shelf
interior. The numerical simulations show that coastal circulation is greatly
influenced by river runoff and especially in the case of the Danube, which is
excessively high with monthly aver-aged values ranging from 5000 to 10000 m3
/s. A significant contribution of runoff comes from the neighbouring rivers. At
the same time, the North Western Shelf is quite broad, so that the coastal
dynamics are largely sheltered from the conditions in the deeper sea. Buoyancy
due to river runoff thus dominates, creating a southward coastal current that is
the predominant pathway for the land-drained inputs. As in all shelf areas, wind
stress is a major circulation forcing mechanism and it modifies the buoyancy
induced flow. It is shown that the seasonal variability in river runoff and wind
stress, in combination with the shelf topography, determines the different
pathways for the terrestrial inputs. Implications on the overall basin
circulation are drawn, as the availability of low-salinity waters of river
origin affects the upper Black Sea layer. Consequently, the formation of
distinct water masses (such as the Cold Intermediate Layer) and the properties
of the outflow toward the Mediterranean are also influenced.
Key words. Oceanography: general (continental shelf
processes; numerical modelling) – Oceanography: physical (air-sea
interactions) |
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