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| Claudet, Joachim; Bopp, Laurent; Cheung, William W.l.; Devillers, Rodolphe; Escobar-briones, Elva; Haugan, Peter; Heymans, Johanna J.; Masson-delmotte, Valérie; Matz-lück, Nele; Miloslavich, Patricia; Mullineaux, Lauren; Visbeck, Martin; Watson, Robert; Zivian, Anna Milena; Ansorge, Isabelle; Araujo, Moacyr; Aricò, Salvatore; Bailly, Denis; Barbière, Julian; Barnerias, Cyrille; Bowler, Chris; Brun, Victor; Cazenave, Anny; Diver, Cameron; Euzen, Agathe; Gaye, Amadou Thierno; Hilmi, Nathalie; Ménard, Frédéric; Moulin, Cyril; Muñoz, Norma Patricia; Parmentier, Rémi; Pebayle, Antoine; Pörtner, Hans-otto; Osvaldina, Silva; Ricard, Patricia; Santos, Ricardo Serrão; Sicre, Marie-alexandrine; Thiébault, Stéphanie; Thiele, Torsten; Troublé, Romain; Turra, Alexander; Uku, Jacqueline; Gaill, Françoise. |
| The health of the ocean, central to human well-being, has now reached a critical point. Most fish stocks are overexploited, climate change and increased dissolved carbon dioxide are changing ocean chemistry and disrupting species throughout food webs, and the fundamental capacity of the ocean to regulate the climate has been altered. However, key technical, organizational, and conceptual scientific barriers have prevented the identification of policy levers for sustainability and transformative action. Here, we recommend key strategies to address these challenges, including (1) stronger integration of sciences and (2) ocean-observing systems, (3) improved science-policy interfaces, (4) new partnerships supported by (5) a new ocean-climate finance system,... |
| Tipo: Text |
Palavras-chave: Ocean health; Human well-being; United Nations; Policy levers; Sustainability; Transformative actions; Strategy. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00637/74861/75262.pdf |
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| Desprat, S.; Combourieu-nebout, N.; Essallami, L.; Sicre, Marie-alexandrine; Dormoy, I.; Peyron, O.; Siani, G.; Roumazeilles, V. Bout; Turon, J. L.. |
| Despite a large number of studies, the long-term and millennial to centennial-scale climatic variability in the Mediterranean region during the last deglaciation and the Holocene is still debated, including in the southern Central Mediterranean. In this paper, we present a new marine pollen sequence (core MD04-2797CQ) from the Siculo-Tunisian Strait documenting the regional vegetation and climatic changes in the southern Central Mediterranean during the last deglaciation and the Holocene. The MD04-2797CQ marine pollen sequence shows that semi-desert plants dominated the vegetal cover in the southern Central Mediterranean between 18.2 and 12.3 ka cal BP, indicating prevailing dry conditions during the deglaciation, even during the Greenland Interstadial... |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00181/29241/27634.pdf |
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| Bassetti, Maria-angela; Berne, Serge; Sicre, Marie-alexandrine; Dennielou, Bernard; Alonso, Yoann; Buscail, Roselyne; Jalali, Bassem; Hebert, Bertil; Menniti, Christophe. |
| Expanded marine Holocene archives are relatively scarce in the Mediterranean Sea because most of the sediments were trapped in catchment areas during this period. Mud belts are the most suitable targets to access expanded Holocene records. These sedimentary bodies represent excellent archives for the study of sea-land interactions and notably the impact of the hydrological activity on sediment accumulation. We retrieved a 7.2m long sediment core from the Rhone mud belt in the Gulf of Lions in an area where the average accumulation rate is ca. 0.70 m 1000 yr(-1). This core thus provides a continuous and high-resolution record of the last 10 ka cal BP. A multiproxy dataset (XRF core scan, C-14 dates, grain size and organic-matter analysis) combined with... |
| Tipo: Text |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00352/46360/45981.pdf |
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| Jalali, Bassem; Sicre, Marie-alexandrine; Azuara, Julien; Pellichero, Violaine; Combourieu-nebout, Nathalie. |
| The 4.2 ka BP event, spanning from ca 4200 to 3900 cal BP, has been documented in numerous archaeological data and continental archives across the Northern Hemisphere as an abrupt shift to dry and cold climate. However, data on synchronous ocean circulation changes are notably lacking, thus preventing us from getting a full insight into the physical mechanisms responsible for this climate deterioration. Here, we present two high-resolution (5–20 years) sea surface temperature (SST) records from the subpolar gyre and off north Iceland in the vicinity of the polar front obtained from alkenone paleo-thermometry and compare them with proxy data from the western Mediterranean Sea to gain information on regional temperature and precipitation patterns. Our... |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00488/60005/63242.pdf |
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| Magny, Michel; Combourieu Nebout, Nathalie; De Beaulieu, Jacques-louis; Bout-roumazeilles, Viviane; Colombaroli, D.; Desprat, Stephanie; Francke, A.; Joannin, Sebastien; Ortu, Elena; Peyron, Odile; Revel, Marie; Sadori, Laura; Siani, Giuseppe; Sicre, Marie-alexandrine; Samartin, S.; Simonneau, A.; Tinner, Willy; Vanniere, Boris; Wagner, B.; Zanchetta, Giovanni; Anselmetti, Flavio S.; Brugiapaglia, E.; Chapron, Emmanuel; Debret, Maxime; Desmet, Marc; Didier, Jean; Essallami, Latifa; Galop, D.; Gilli, A.; Haas, J.n.; Kallel, Nejib; Millet, L.; Stock, Andy; Turon, Jean-louis; Wirth, S.. |
| On the basis of a multi-proxy approach and a strategy combining lacustrine and marine records along a north-south transect, data collected in the central Mediterranean within the framework of a collaborative project have led to reconstruction of high-resolution and well-dated palaeohydrological records and to assessment of their spatial and temporal coherency. Contrasting patterns of palaeohydrological changes have been evidenced in the central Mediterranean: south (north) of around 40 degrees N of latitude, the middle part of the Holocene was characterised by lake-level maxima (minima), during an interval dated to ca. 10 300-4500 cal BP to the south and 9000-4500 cal BP to the north. Available data suggest that these contrasting palaeohydrological... |
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| Ano: 2013 |
URL: https://archimer.ifremer.fr/doc/00264/37570/36902.pdf |
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| Sicre, Marie-alexandrine; Siani, G.; Genty, D.; Kallel, N.; Essallami, L.. |
| Sea surface temperatures (SSTs) were reconstructed over the last 25 000 yr using alkenone paleothermometry and planktonic foraminifera assemblages from two cores of the central Mediterranean Sea: the MD04-2797 core (Siculo-Tunisian channel) and the MD90-917 core (South Adriatic Sea). Comparison of the centennial scale structure of the two temperature signals during the last deglaciation period reveals significant differences in timing and amplitude. We suggest that seasonal changes likely account for seemingly proxy record divergences during abrupt transitions from glacial to interglacial climates and for the apparent short duration of the Younger Dryas (YD) depicted by the alkenone time series, a feature that has already been stressed in earlier studies... |
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| Ano: 2013 |
URL: https://archimer.ifremer.fr/doc/00181/29201/27586.pdf |
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