气候变化领域集成服务门户(CCPortal): Oceanic versus continental influences over the last 7 kyrs from a mid-shelf record in the northern Bay of Biscay (NE Atlantic)

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DOI	10.1016/j.quascirev.2019.106135
	Oceanic versus continental influences over the last 7 kyrs from a mid-shelf record in the northern Bay of Biscay (NE Atlantic)
	Penaud A.; Ganne A.; Eynaud F.; Lambert C.; Coste P.O.; Herlédan M.; Vidal M.; Goslin J.; Stéphan P.; Charria G.; Pailler Y.; Durand M.; Zumaque J.; Mojtahid M.
发表日期	2020
ISSN	0277-3791
卷号	229
英文摘要	We discuss paleoenvironments of north-western France over the last 7 kyrs in terms of: i) long-term changes (relative sea-level rise and boreal summer insolation), ii) rapid climate changes (millennial-scale Bond events and multi-decadal regimes of the North Atlantic Oscillation: NAO) and iii) growing human impacts in watersheds. Our study focuses on the CBT-CS11 core, retrieved in the northern Bay of Biscay, with new high-resolution (70 years) palynological data (dinoflagellate cysts and pollen), combined with sedimentological and oxygen stable isotopic records. This multiproxy approach enabled us to gain a better understanding of the influence of varying Middle to Late Holocene climate regimes on marine, coastal and terrestrial ecosystems as well as on human coastal societies. We especially show that the slowdown of the relative sea-level rise, starting at around 5.9 ka BP, led to the stabilization of tidal flats in estuarine environments. Subsequently, increasing river flows to the ocean resulted in a progressive seasonal stratification of the shelf under increasing winter precipitations and establishment of the modern winter thermohaline front at 3.3 ka BP. In addition, within the 4–2 ka BP interval, palynological and sedimentological evidence suggests increasing river discharges in north-western France, in a context of a weakened Atlantic subpolar gyre and recurrent negative “NAO-like” conditions. Finally, we identified a major transition at around 1.2 ka BP (Early Middle-Ages) that appears to be linked to a period of maximal anthropogenic landscape opening and soil erosion, implying stronger primary productivity in coastal surface waters of the studied region. © 2019 Elsevier Ltd
英文关键词	Atlantic subpolar gyre; Holocene; Precipitation regimes; Rapid climate changes; Stable isotopes; Vegetation dynamics; Winter horizontal thermohaline front
语种	英语
scopus关键词	Atmospheric pressure; Glacial geology; Isotopes; Sea level; Holocenes; Precipitation regimes; Rapid climate change; Stable isotopes; Subpolar gyres; Thermohaline; Vegetation dynamics; Climate change; gyre; Holocene; oxygen isotope; palynology; sea level change; stratification; summer; thermohaline structure; Atlantic Ocean; Bay of Biscay; France; Dinophyceae
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151607
作者单位	Univ Brest (UBO), CNRS, UMR 6538 Laboratoire Géosciences Océan (LGO), Plouzané, F-29280, France; Univ Bordeaux, CNRS, UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC), Talence, F-33405, France; Univ Vannes (UBS), UMR 6538 Laboratoire Géosciences Océan (LGO), Vannes, F-56000, France; Ifremer, Géosciences Marines, Centre de Bretagne, ZI Pointe du diable, CS 10070, Plouzané, F-29280, France; Univ Brest, CNRS, UMR 6554 Littoral Environnement Télédétection Géomatique (LETG) Brest, Plouzané, F-29280, France; Ifremer, Univ Brest, CNRS,IRD, UMR6523 Laboratoire d'Océanographie Physique et Spatiale (LOPS), Plouzané, F-29280, France; Inrap, UMR 8215 Trajectoires, IUEM, Plouzané, F-29280, France; LPG-BIAF UMR-CNRS 6112, UNIV Angers, UNIV Nantes, CNRS, UFR Sciences, 2 bd Lavoisier, Angers, F-49045, France; Geotop Université du Québec à Montréal, Montréal, Canada
推荐引用方式 GB/T 7714	Penaud A.,Ganne A.,Eynaud F.,et al. Oceanic versus continental influences over the last 7 kyrs from a mid-shelf record in the northern Bay of Biscay (NE Atlantic)[J],2020,229.
APA	Penaud A..,Ganne A..,Eynaud F..,Lambert C..,Coste P.O..,...&Mojtahid M..(2020).Oceanic versus continental influences over the last 7 kyrs from a mid-shelf record in the northern Bay of Biscay (NE Atlantic).Quaternary Science Reviews,229.
MLA	Penaud A.,et al."Oceanic versus continental influences over the last 7 kyrs from a mid-shelf record in the northern Bay of Biscay (NE Atlantic)".Quaternary Science Reviews 229(2020).