Interannual variability of water mass properties in the Tunisia–Sicily Channel - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Marine Systems Année : 2014

Interannual variability of water mass properties in the Tunisia–Sicily Channel

Sana Ben Ismail
  • Fonction : Auteur
Chérif Sammari
Gian Pietro Gasparini
  • Fonction : Auteur
Lotfi Aleya
  • Fonction : Auteur
  • PersonId : 865719

Résumé

We analysed in situ CTD data collected on 36 joint Tunisian–Italian oceanographic cruises in the Tunisia–Sicily Channel (Cap Bon–Mazara del Vallo section) from 1995 to 2009 in order to identify the water masses in the region and to estimate the interannual variability of their hydrological characteristics. Besides the well-known AW (Atlantic Water) and LIW (Levantine Intermediate Water), other water masses have been identified though their presence is neither as steady nor as stable as the aforementioned ones. The WIW (Western Intermediate Water) flows beneath the AW towards the eastern basin while the IW (Ionian Water), with a highly intermittent character, flows within the subsurface layer towards the western basin. The flow of subsurface water (WIW and IW) is affected by intense mixing which modifies the water masses, tending to make them disappear. Moreover, the same hydrological time series produced interesting results concerning the increase in both temperature and salinity in the Tunisia–Sicily Channel. This trend especially concerns the deeper layers (LIW and tEMDW, i.e. transitional Eastern Mediterranean Deep Water) and we hypothesise that this is a direct response to climatic change occurring in the eastern basin.

Dates et versions

hal-01104753 , version 1 (19-01-2015)

Identifiants

Citer

Sana Ben Ismail, Katrin Schroeder, Chérif Sammari, Gian Pietro Gasparini, Mireno Borghini, et al.. Interannual variability of water mass properties in the Tunisia–Sicily Channel. Journal of Marine Systems, 2014, 135, pp.14-28. ⟨10.1016/j.jmarsys.2013.06.010⟩. ⟨hal-01104753⟩
78 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More