20.500.12556/DiRROS-19505 Experimental evidence of long-term oceanic circulation reversals without wind influence in the North Ionian Sea Under the emerging features of interannual-to-decadal ocean variability, the periodical reversals of the North Ionian Gyre (NIG), driven mostly by the mechanism named Adriatic-Ionian Bimodal Oscillating System (BiOS), are known as impacting on marine physics and biogeochemistry and potentially influencing short-term regional climate predictability in the Eastern Mediterranean. Whilst it has been suggested that local wind forcing cannot explain such variability, aspects of the alternative hypothesis indicating that NIG reversals mainly arises from an internal ocean feedback mechanism alone remain largely debated. Here we demonstrate, using the results of physical experiments, performed in the world’s largest rotating tank and numerical simulations, that the main observed feature of BiOS, i.e., the switch of polarity of the near-surface circulation in the NIG, can be induced by a mere injection of dense water on a sloping bottom. Hence, BiOS is a truly oceanic mode of variability and abrupt polarity changes in circulation can arise solely from extreme dense water formation events. physical oceanography climate and Earth system modelling true false true Angleški jezik Ni določen Neznano 2024-07-19 03:41:42 2024-07-19 13:39:02 2024-07-20 04:03:07 0000-00-00 00:00:00 2020 0 0 Nasl. z nasl. zaslona; Opis vira z dne 6. 2. 2020; str. 1-9 Vol. 10 2020 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2020-02-05 574.5 2045-2322 10.1038/s41598-020-57862-6 5309519 https://www.nature.com/articles/s41598-020-57862-6 1 49be1313-455f-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=26914 RAZ_Rubino_Angelo_2020.pdf RAZ_Rubino_Angelo_2020.pdf 1 BC6DF513027A4605F26C1726DD647904 5ee8595c3fd5444d9cadb3688eb4b6c9f4080e8f03794293016e4f7a0c3fad31 d0e72e06-45b2-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=27013 Nacionalni inštitut za biologijo 0 0 0