 |
| Titel |
Fundamental Adriatic seiche recorded by current meters |
| VerfasserIn |
N. Leder, M. Orlic |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
0992-7689
|
| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 22, no. 5 ; Nr. 22, no. 5 (2004-04-08), S.1449-1464 |
| Datensatznummer |
250014850
|
| Publikation (Nr.) |
 copernicus.org/angeo-22-1449-2004.pdf |
|
|
|
|
|
| Zusammenfassung |
Currents recorded at two stations positioned at the Adriatic shelf break
between 17 February and 6 March 1989 were considered. They provided the
first evidence of current variability related to the Adriatic-wide seiches.
Current spectra were dominated by a peak at 21.1h – a well-known period of
the fundamental Adriatic mode. Amplitudes of oscillations were considerable,
occasionally greater than 30cm/s. Both along- and cross-basin currents were
recorded, thus signalling the importance of rotational effects. Comparison of
the current data with the sea-level measurements performed simultaneously
along the east Adriatic coast showed that the 21-h currents flowing in the
Adriatic preceded sea levels by a quarter of a cycle, as would be expected
from a simple model of bay seiches. Sea-level amplitudes reached 40cm in
the North Adriatic, thus marking the event as one of the strongest on
record. Seiching was triggered by a suddenly changing sirocco wind, as is
usually the case in the Adriatic. The most important features of the seiche
event were reproduced with a two-dimensional hydrodynamic model of the
Adriatic Sea, forced by the sea-level residuals measured at Otranto and the
air pressure and wind data recorded at Lastovo. The model showed that the
seiche-related currents were relatively strong in the area where the current
measurements were performed and further north – between Zadar and Ancona.
Key words. Oceanography: general (continental shelf processes)
– Oceanography: physical (sea-level variations, currents) |
| |
|
| Teil von |
|
|
|
|
|
|
|
|