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  Saw-tooth modulation of the deep-water thermohaline properties in the southern Adriatic Sea

Querin, S., Bensi, M., Cardin, V., Solidoro, C., Bacer, S., Mariotti, L., et al. (2016). Saw-tooth modulation of the deep-water thermohaline properties in the southern Adriatic Sea. Journal of Geophysical Research: Oceans, 121(7), 4585-4600. doi:10.1002/2015JC011522.

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Querin, Stefano1, Author
Bensi, Manuel1, Author
Cardin, Vanessa1, Author
Solidoro, Cosimo1, Author
Bacer, S.2, Author              
Mariotti, Laura1, Author
Stel, Fulvio1, Author
Malacic, Vlado1, Author
Affiliations:
1external, ou_persistent22              
2Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826285              

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 Abstract: In this study, we investigate the dynamics of the bottom layer of the southern Adriatic Sea (eastern Mediterranean basin) by merging experimental measurements and numerical simulations. We hypothesize that the recently observed continuous density decrease over time, which was basically related to a temperature increase, and the following sudden density rise, which was caused by the intrusion of very dense water masses (cold but relatively fresh), constitute one cycle of a general saw-tooth pattern: the alternation of long-lasting and almost linear density decreases (mixing phases) and sudden density increases (dense water intrusion phases). The model results, which provide a basin-scale view of the process, corroborate this theory because they satisfactorily reproduced the observed oceanographic features. We describe the almost linear density decrease in terms of local mixing fostered by the advection of flow instabilities that originate from the large-scale quasi-permanent cyclonic circulation. Conversely, diffusive processes play a minor role in determining the bottom layer thermohaline variability. The interpretation of the experimental findings, supported by the numerical simulations, suggests that similar dynamics might be observed in other basins characterized by similar bathymetric and hydrodynamic features.

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Language(s): eng - English
 Dates: 2016
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000383468500010
DOI: 10.1002/2015JC011522
 Degree: -

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Title: Journal of Geophysical Research: Oceans
  Other : JGR
Source Genre: Journal
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Publ. Info: Hoboken, NJ : Wiley
Pages: - Volume / Issue: 121 (7) Sequence Number: - Start / End Page: 4585 - 4600 Identifier: Other: 2169-9291
CoNE: https://pure.mpg.de/cone/journals/resource/2169-9291