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| Ayache, Mohamed; Dutay, Jean-claude; Arsouze, Thomas; Revillon, Sidonie; Beuvier, Jonathan; Jeandel, Catherine. |
| An extensive compilation of published neodymium (Nd) concentrations and isotopic compositions (Nd IC) was realized in order to establish a new database and a map (using a high-resolution geological map of the area) of the distribution of these parameters for all the Mediterranean margins. Data were extracted from different kinds of samples: river solid discharge deposited on the shelf, sedimentary material collected on the margin or geological material outcropping above or close to a margin. Additional analyses of surface sediments were done in order to improve this data set in key areas (e.g. Sicilian strait). The Mediterranean margin Nd isotopic signatures vary from non-radiogenic values around the Gulf of Lion, (epsilon(Nd) values similar to -11) to... |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00639/75064/75547.pdf |
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| Ayache, Mohamed; Bondeau, Alberte; Pages, Rémi; Barrier, Nicolas; Ostberg, Sebastian; Baklouti, Melika. |
| Land forcing (water discharge and nutrient loads) is reported as one of the major sources of uncertainty limiting the capacity of marine biogeochemical models. Runoff from rivers and coastal plains delivers significant amounts of nutrients to the Mediterranean Sea from agricultural activities and urban wastewater. Several recent studies show that variations in river inputs may play a significant role in marine biogeochemical cycles and the planktonic food web throughout the entire basin. The aim of this study is to estimate the water dischargeas as well as nitrate (NO3) and phosphate (PO4) release into the Mediterranean Sea from basin-wide agriculture and inhabited areas through the implementation of the biogeochemical land-sea nutrient transfer processes... |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00665/77756/79881.pdf |
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| Pagès, Rémi; Baklouti, Melika; Barrier, Nicolas; Ayache, Mohamed; Sevault, Florence; Somot, Samuel; Moutin, Thierry. |
| The Mediterranean region has been shown to be particularly exposed to climate change, with observed trends that are more pronounced than the global tendency. In forecast studies based on a RCP 8.5 scenario, there seems to be a consensus that, along with an increase in temperature and salinity over the next century, a reduction in the intensity of deep-water formation and a shallowing of the mixed layer [especially in the North-Western Mediterranean Sea (MS)] are expected. By contrast, only a few studies have investigated the effects of climate change on the biogeochemistry of the MS using a 3D physical/biogeochemical model. In this study, our aim was to explore the impact of the variations in hydrodynamic forcing induced by climate change on the... |
| Tipo: Text |
Palavras-chave: Mediterranean Sea; Coupled hydrodynamic-biogeochemical model; RCP scenario; Biogeochemistry; Climate change. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00659/77073/78385.pdf |
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