Sedimentary archives of climate and sea-level changes during the Holocene in the Rhône prodelta (NW Mediterranean Sea)
| العنوان: | Sedimentary archives of climate and sea-level changes during the Holocene in the Rhône prodelta (NW Mediterranean Sea) |
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| المؤلفون: | Anne-Sophie Fanget, Maria-Angela Bassetti, Serge Berné, Alina Tudryn, Christophe Fontanier |
| المساهمون: | Centre de Formation et de Recherche sur les Environnements Méditérranéens (CEFREM), Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Géosciences Paris Sud (GEOPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Climate of the Past, Vol 12, Iss 12, Pp 2161-2179 (2016) Climate of the Past Climate of the Past, European Geosciences Union (EGU), 2016, 12, pp.2161-2179. ⟨10.5194/cp-12-2161-2016⟩ Climate Of The Past (1814-9324) (Copernicus Gesellschaft Mbh), 2016-12, Vol. 12, N. 12, P. 2161-2179 |
| بيانات النشر: | Copernicus GmbH, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | 010506 paleontology, 010504 meteorology & atmospheric sciences, lcsh:Environmental protection, Stratigraphy, Meiobenthos, Oceanography, 01 natural sciences, Foraminifera, Mediterranean sea, lcsh:Environmental pollution, lcsh:TD169-171.8, ere holocène, 14. Life underwater, lcsh:Environmental sciences, Holocene, Sea level, 0105 earth and related environmental sciences, lcsh:GE1-350, Global and Planetary Change, climatologie, biology, Elphidium, rhône delta, Paleontology, climatology, delta du Rhône, biology.organism_classification, holocene era, Cassidulina, oceanologie, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, 13. Climate action, [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy, lcsh:TD172-193.5, Progradation, Geology |
| الوصف: | A 7.38 m long sediment core was collected from the eastern section of the Rhône prodelta (NW Mediterranean) at 67 m water depth. A multi-proxy study (including sedimentary facies, benthic foraminifera, ostracods, and clay mineralogy) provides a multi-decadal to century-scale record of climate and sea-level changes during the Holocene. The early Holocene is marked by alternative silt and clay layers interpreted as distal tempestites deposited in a context of rising sea level. This interval contains shallow infra-littoral benthic meiofauna (e.g., Pontocythere elongata, Elphidium spp., Quinqueloculina lata) and formed between ca. 20 and 50 m water depth. The middle Holocene (ca. 8.3 to 4.5 ka cal. BP) is characterized, at the core site, by a period of sediment starvation (accumulation rate of ca. 0.01 cm yr−1) resulting from the maximum landward shift of the shoreline and the Rhône outlet(s). From a sequence stratigraphic point of view, this condensed section, about 35 cm thick, can be identified on seismic profiles as a maximum flooding surface that marks the transition between delta retrogradation and delta progradation. The transition between the early Holocene deposits and the middle Holocene condensed section is marked by a gradual change in all proxy records. Following the stabilization of sea level at a global scale, the late Holocene is marked by the establishment of prodeltaic conditions at the core site, as shown by the lithofacies and by the presence of benthic meiofauna typical of the modern Rhône prodelta (e.g., Valvulineria bradyana, Cassidulina carinata, Bulimina marginata). Several periods of increased fluvial discharge are also emphasized by the presence of species commonly found in brackish and shallow-water environments (e.g., Leptocythere spp.). Some of these periods correspond to the multi-decadal to centennial late Holocene humid periods recognized in Europe (i.e., the 2.8 ka event and the Little Ice Age). Two other periods of increased runoffs at ca. 1.3 and 1.1 ka cal. BP are recognized, which are likely to reflect periods of regional climate deterioration that are observed in the Rhône watershed. Conversely, the Migration Period Cooling (ca. 1.4 ka cal. BP) and the Medieval Climate Anomaly (ca. AD 950–1250) correspond locally to periods of increased dryness. |
| وصف الملف: | application/pdf |
| تدمد: | 1814-9332 1814-9324 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06ce73bcc42c13eb7df0340f7321f2a9 https://doi.org/10.5194/cp-12-2161-2016 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....06ce73bcc42c13eb7df0340f7321f2a9 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 18149332 18149324 |
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