Characterisation of low-frequency sea level oscillations in the Mediterranean sea
Določanje nizkofrekvenčnega nihanja morske gladine v Sredozemskem morju
- Avtorji: Vesna Bertoncelj, Matjaž Ličer, Dušan Žagar, Davide Bonaldo
- Citat: Acta hydrotechnica, vol. 32, no. 57, pp. 121-133, 2019. https://doi.org/10.15292/acta.hydro.2019.09
- Povzetek: Ustrezni ukrepi za zaščito nižjeležečih obalnih območjih pred poplavami morja zahtevajo široko poznavanje vseh potencialnih dejavnikov, ki vplivajo na porast gladine morja, vključno z nizkofrekvenčnimi nihanji morske gladine. Med številnimi metodami smo izbrali in prikazali uporabo valčne analize, spektralne analize, analize drsečega periodograma ter rotacijske spektralne analize. Te metode smo uporabili za določanje značilnosti subinercialnega nihanja morske gladine s periodo večjo od periode inercialnih nihanj (18 ur v severnem Jadranskem morju) v Sredozemskem morju na merjenih podatkih morske gladine in morskih tokov. S preliminarno analizo, izvedeno na podatkih izbranega neurja na Jadranskem morju ob koncu januarja in v začetku februarja 2014, smo določili frekvenčni pas nihanja med 0,3−0,4 dan−1. Nadaljnjo analizo smo izvedli na večletnih merjenih podatkih morske gladine za 62 merilnih mest v Sredozemskem morju. Z uporabo naštetih metod smo pridobili preliminarne rezultate, sezonsko pojavljanje in trajanje subinercialnega nihanja. Pridobljeni rezultati so lahko izhodišče za nadaljnje raziskave širjenja signala po celotnem območju Sredozemskega morja in za določanje mehanizmov, ki sprožijo subinercialno nihanje, tudi z vidika podnebnih sprememb.
- Ključne besede: nihanje morske gladine, subinercialno nihanje, Jadransko morje, Sredozemsko morje, valčna analiza, spektralna analiza, drseči periodogram.
- Polno besedilo: a32vb.pdf
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