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Edouard Bard
Aix-Marseille University
386Publications
73H-index
37.4kCitations
Publications 401
Newest
#1Guillemette Ménot (École normale supérieure de Lyon)H-Index: 14
#2Sébastien Pivot (AMU: Aix-Marseille University)
Last.Marie RevelH-Index: 21
view all 10 authors...
Abstract Large fluvial systems, such as the Nile River, allow a basin-scale integrated view of climatological and environmental changes. In this study, we reconstructed the Nile discharge history for the last 20 ka using molecular ratios of glycerol dialkyl glycerol tetraethers (GDGTs) and neodymium (Nd) radiogenic isotopes. By characterizing both the organic and inorganic fractions, we assessed the relevance of the GDGT-based proxies in deltaic environments as tracers of terrigenous origin. A l...
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#1Céline Martin (AMU: Aix-Marseille University)H-Index: 12
#2Guillemette Ménot (École normale supérieure de Lyon)H-Index: 14
Last.Edouard Bard (AMU: Aix-Marseille University)H-Index: 73
view all 9 authors...
Abstract The evolution of temperatures during the Holocene is controversial, especially for the early Holocene. The occurrence of the Holocene Thermal Maximum (HTM) during the early Holocene has recently been reconsidered and seasonal biases have been suggested in the paleoclimatic proxies. High regional variability and a low number of reliable and continuous quantitative reconstructions compared with the oceanic realm further complicate study of the Holocene climate in the continental realm. We...
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#1Helen Fewlass (MPG: Max Planck Society)H-Index: 1
#2Thibaut Tuna (AMU: Aix-Marseille University)H-Index: 4
Last.Sahra Talamo (MPG: Max Planck Society)H-Index: 23
view all 7 authors...
Radiocarbon dating archaeological bone typically requires 300–1000 mg material using standard protocols. We report the results of reducing sample size at both the pretreatment and 14C measurement stages for eight archaeological bones spanning the radiocarbon timescale at different levels of preservation. We adapted our standard collagen extraction protocol specifically for <100 mg bone material. Collagen was extracted at least twice (from 37–100 mg material) from each bone. Collagen aliquots con...
1 CitationsSource
#1Manuela CapanoH-Index: 6
#2Cécile MiramontH-Index: 6
Last.Edouard BardH-Index: 73
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#1S. Pivot (AMU: Aix-Marseille University)H-Index: 1
#2Mélanie Baroni (AMU: Aix-Marseille University)H-Index: 4
Last.Xavier Giraud (AMU: Aix-Marseille University)H-Index: 4
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#1Jennifer L. Lamp (LDEO: Lamont–Doherty Earth Observatory)H-Index: 2
#2Nicolás E. Young (LDEO: Lamont–Doherty Earth Observatory)H-Index: 19
Last.Joerg M. Schaefer (LDEO: Lamont–Doherty Earth Observatory)H-Index: 36
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Abstract Cosmogenic in situ 14C in quartz is rapidly becoming a widely used geochronological tool for studying earth surface processes over the last 30,000 years. The Lamont-Doherty Earth Observatory houses one of the longest continuously-operating cosmogenic in situ 14C laboratories; in this contribution, we provide an update on the status of the laboratory following Goehring et al. (2014). From 2010 to the present, our long-term average blank value is 119,000 ± 37,000 14C atoms, with no statis...
2 CitationsSource
#1Helen Fewlass (MPG: Max Planck Society)H-Index: 1
#2Sahra Talamo (UNIBO: University of Bologna)H-Index: 23
Last.Jiri Svoboda (Masaryk University)H-Index: 34
view all 12 authors...
Abstract The ritual human burials and scattered fragments of human bones excavated from Dolni Věstonice II and Pavlov I (Czech Republic) in the 20th century provide a large body of evidence on morphology and funerary practices in the Gravettian as well as the population history of European Homo sapiens during the Upper Palaeolithic. A series of radiocarbon dates on charcoal and animal bone places the occupation of the sites predominantly between 31,000–29,000 cal BP (Early-Evolved Pavlovian) but...
1 CitationsSource
#1Yoann Fagault (AMU: Aix-Marseille University)H-Index: 4
#2Thibaut Tuna (AMU: Aix-Marseille University)H-Index: 4
Last.Edouard Bard (AMU: Aix-Marseille University)H-Index: 73
view all 4 authors...
Abstract Since the beginning of AMS, 14C analyses in foraminifera have been widely used to date deep-sea cores and to estimate reservoir ages of surface and deep ocean layers. Classical AMS requires acid hydrolysis of carbonate samples followed by graphitization of solid targets. For dating very small carbonate samples, an alternative route is to bypass the graphitization step by means of a CO2 gas ion source coupled to a carbonate hydrolysis system. We report tests and developments performed ov...
2 CitationsSource
#1Céline Martin (AMU: Aix-Marseille University)H-Index: 12
#2Guillemette Ménot (University of Lyon)H-Index: 14
Last.Edouard Bard (AMU: Aix-Marseille University)H-Index: 73
view all 7 authors...
The distribution of branched glycerol dialkyl glycerol tetraethers (brGDGTs) has been shown to correlate with mean annual air temperature and is increasingly used for paleoclimate reconstructions, in particular in lakes. Numerous studies have reported in situ production of brGDGTs in lakes. These brGDGTs have different distributions compared with those produced in soils and their mixing hampers paleoclimate reconstructions. Very few tools exist to determine brGDGT sources in the present and to t...
1 CitationsSource
#1Lise Bonvalot (AMU: Aix-Marseille University)H-Index: 3
#2Thibaut Tuna (AMU: Aix-Marseille University)H-Index: 4
Last.Edouard Bard (AMU: Aix-Marseille University)H-Index: 73
view all 9 authors...
Abstract Located in the Mediterranean Basin and close to Marseille (France), Fos-sur-Mer is situated in the vicinity of industrial harbor and agricultural lands. Its location makes it prone to mixed pollution contributions, combining the influence of residential, industrial, agricultural, maritime road and traffic sources. For this study, the origins of carbonaceous particles sampled over several months are investigated by a coupled approach based on analyses of radiocarbon (14C), elemental to t...
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