A 130,000-year record of Levantine Intermediate Water flow variability in the Corsica Trough, western Mediterranean Sea

Type Article
Date 2012-02
Language English
Author(s) Toucanne SamuelORCID1, Jouet Gwenael1, Ducassou Emmanuelle2, Bassetti Maria-Angela3, Dennielou BernardORCID1, Minto'o Charlie Morelle Angue3, Lahmi Marjolaine1, Touyet Nicolas2, Charlier Karine2, Lericolais GillesORCID1, Mulder Thierry2
Affiliation(s) 1 : IFREMER, Lab Environm Sedimentaires, F-29280 Plouzane, France.
2 : Univ Bordeaux, UMR 5805, F-33405 Talence, France.
3 : Univ Perpignan, Lab IMAGES BatU, F-66860 Perpignan, France.
Source Quaternary Science Reviews (0277-3791) (Pergamon-elsevier Science Ltd), 2012-02 , Vol. 33 , P. 55-73
DOI 10.1016/j.quascirev.2011.11.020
WOS© Times Cited 45
Keyword(s) Levantine Intermediate Water, Mediterranean Sea, Thermohaline circulation, Palaeoceanography
Abstract Sortable silt particle-size data and stable isotope analyses from the Corsica Trough, western Mediterranean Sea, provide a continuous palaeoceanographic record of the inflow, ventilation and vertical fluctuations of the Levantine Intermediate Water (LIW) in the northern Tyrrhenian Sea for the last 130,000 years. The results presented herein reveal that climate changes drive the Mediterranean intermediate circulation on Milankovitch to millennial time-scales. Intensified intermediate inflow and ventilation in the Corsica Trough occurred throughout the last glacial interval, with a cold / faster – warm / slower pattern existing between the Dansgaard-Oeschger climatic oscillations (including Heinrich events) and the LIW variability. By contrast, a weak intermediate ventilation characterised the Holocene and the last interglacial period, especially during insolation maxima and the sapropel deposition in the eastern Mediterranean. This variability probably reflects the changes of the eastern Mediterranean net evaporation, as well as the propagation to the western Mediterranean of the profound hydrographic adjustments of the Levantine Sea and adjacent areas to climate forcing. The implications for the formation and ventilation of the Western Mediterranean Deep Water (WMDW) in the northwestern Mediterranean basin, as well as for Mediterranean-Atlantic exchange through the Strait of Gibraltar are discussed.
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Toucanne Samuel, Jouet Gwenael, Ducassou Emmanuelle, Bassetti Maria-Angela, Dennielou Bernard, Minto'o Charlie Morelle Angue, Lahmi Marjolaine, Touyet Nicolas, Charlier Karine, Lericolais Gilles, Mulder Thierry (2012). A 130,000-year record of Levantine Intermediate Water flow variability in the Corsica Trough, western Mediterranean Sea. Quaternary Science Reviews, 33, 55-73. Publisher's official version : https://doi.org/10.1016/j.quascirev.2011.11.020 , Open Access version : https://archimer.ifremer.fr/doc/00054/16506/