Abrupt warming and salinification of intermediate waters interplays with decline of deep convection in the Northwestern Mediterranean Sea
| Type | : | ACL |
|---|---|---|
| Nature | : | Production scientifique |
| Au bénéfice du Laboratoire | : | Oui |
| Statut de publication | : | Publié |
| Année de publication | : | 2020 |
| Auteurs (15) | : | MARGIRIER Félix TESTOR Pierre HESLOP Emma MALLIL Katia BOSSE Antony HOUPERT Loic MORTIER Laurent BOUIN Marie-noëlle COPPOLA Laurent D'ORTENZIO Fabrizio DURRIEU DE MADRON Xavier MOURRE Baptiste PRIEUR Louis RAIMBAULT Patrick TAILLANDIER Vincent |
| Revue scientifique | : | Scientific Reports |
| Volume | : | 10 |
| Fascicule | : | 1 |
| Pages | : | |
| DOI | : | 10.1038/s41598-020-77859-5 |
| URL | : | https://doi.org/10.1038/s41598-020-77859-5 |
| Abstract | : | The Mediterranean Sea is a hotspot for climate change, and recent studies have reported its intense warming and salinification. In this study, we use an outstanding dataset relying mostly on glider endurance lines but also on other platforms to track these trends in the northwestern Mediterranean where deep convection occurs. Thanks to a high spatial coverage and a high temporal resolution over the period 2007–2017, we observed the warming (+0.06 ∘C year−1) and salinification (+0.012 year−1) of Levantine Intermediate Water (LIW) in the Ligurian Sea. These rates are similar to those reported closer to its formation area in the Eastern Mediterranean Sea. Further downstream, in the Gulf of Lion, the intermediate heat and salt content were exported to the deep layers from 2009 to 2013 thanks to deep convection processes. In 2014, a LIW step of +0.3 ∘C and +0.08 in salinity could be observed concomitant with a weak winter convection. Warmer and more saline LIW subsequently accumulated in the northwestern basin in the absence of intense deep convective winters until 2018. Deep stratification below the LIW thus increased, which, together with the air–sea heat fluxes intensity, constrained the depth of convection. A key prognostic indicator of the intensity of deep convective events appears to be the convection depth of the previous year. |
| Mots-clés | : | - |
| Commentaire | : | - |
| Tags | : | - |
| Fichier attaché | : | - |
| Citation | : |
Margirier F, Testor P, Heslop E, Mallil K, Bosse A, Houpert L, Mortier L, Bouin M-N, Coppola L, D'Ortenzio F, Durrieu de Madron X, Mourre B, Prieur L, Raimbault P, Taillandier V (2020) Abrupt warming and salinification of intermediate waters interplays with decline of deep convection in the Northwestern Mediterranean Sea. Scientific Reports 10 | doi: 10.1038/s41598-020-77859-5
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