Unexpected Covariant Behavior of the Aegean and Ionian Seas in the Period 1987–2008 by Means of a Nondimensional Sea Surface Height Index

TitleUnexpected Covariant Behavior of the Aegean and Ionian Seas in the Period 1987–2008 by Means of a Nondimensional Sea Surface Height Index
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2017
AuthorsReale, M., Salon S., Crise A., Farneti R., Mosetti R., and Sannino Gianmaria
JournalJournal of Geophysical Research: Oceans
Volume122
Pagination8020-8033
ISSN21699275
KeywordsAdriatic Sea, Aegean Sea, covariance analysis, index method, Ionian Sea, Mediterranean Sea, oceanic circulation, sea surface height, sea surface salinity, thermohaline circulation, water exchange, water mass
Abstract

In this work, we use a set of recent multiyear simulations to develop a simplified sea surface height index (SSH). The index characterizes the dynamics of Ionian upper layer circulation and its links with sea surface height and salinity in the Southern Adriatic and Aegean Seas during the period 1987–2008. The analysis highlights a covariant behavior between Ionian Sea and Aegean Sea associated with a mutual zonal exchange of water masses with different salinity characteristics. Our analysis confirms that the variability observed in the period 1987–2008 in the upper layer circulation of the Ionian was driven by the salinity variability in the Southern Adriatic and Aegean Sea. This study supports and reinforces the hypothesis that two observed BiOS-like reversals reflect the existence of multiple equilibrium states in the Mediterranean Thermohaline circulation in the Eastern Mediterranean and that a complete characterization of observed variability needs to take into account a fully coupled Adriatic-Ionian-Aegean System. © 2017. American Geophysical Union. All Rights Reserved.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85034720236&doi=10.1002%2f2017JC012983&partnerID=40&md5=88df06b4d70e59b0d9754af6945a6b4e
DOI10.1002/2017JC012983