Naslov
Sea-level changes and crustal movements recorded along the east Adriatic coast
(: Sea-level changes and crustal movements recorded along the east Adriatic coast)

Autori
Orlić, Mirko ; Pasarić, Miroslava

Izvornik
Nuovo Cimento della Societa Italiana di Fisica C-Geophysics & Space Physics (0390-5551) 23 (2000), 4; 351-364

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Upper ocean temperature; Surface-temperature; Variability; Atlantic; Oscillation; Frequencies; Anomalies; Modes; Cycle

Sažetak
Sea-level changes in the Adriatic are investigated on the basis of monthly mean sea levels registered at Croatian tide-gauge stations Rovinj, Bakar, Split and Dubrovnik since the beginning of the 1950s. A comparison of sea-level anomalies with air-pressure anomalies recorded simultaneously at Pula, Rijeka, Split and Dubrovnik reveals a statistically significant relationship: a 1 mbar air-pressure change corresponds to a 1.8-2.0 cm sea-level change. The relationship enables sea-level anomalies to be corrected and, consequently, long term sea-level changes to be determined more reliably. A 20-year cycle observed in both the uncorrected and corrected anomalies is interpreted in terms of the global bidecadal signal and its regional manifestation in the Mediterranean. In order to minimize the effects of the bidecadal cycle, trends are analysed over a 30-year sliding window. The procedure reveals that the trends vary along the Croatian coast from ca. 1 mm/a in the North to zero in the South, with deceleration being visible at all the stations during the early 1970s. The finding is interpreted in terms of a) global sea-level rise, b) regional multidecadal sea-level variability, and c) local tectonic movements. Multidecadal sea-level changes are believed to be related to the natural variations observed in the atmosphere above Europe and/or to the anthropogenic changes of the Mediterranean freshwater budget. Tectonic movements bring about a rising of the middle and south Adriatic coast relatively to the north Adriatic coast at a 1 mm/a speed, with the Bakar area being characterized by anomalous crustal motions.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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