Author
Jean-Marie Jouanneau
Bio: Jean-Marie Jouanneau is an academic researcher from University of Bordeaux. The author has contributed to research in topics: Sediment & Continental shelf. The author has an hindex of 23, co-authored 63 publications receiving 2117 citations.
Papers published on a yearly basis
Papers
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TL;DR: 137Cs activities and heavy metal concentration-depth profiles from sediment cores retrieved in 2001 from three reservoirs in the Lot River allow establishing a connection between the temporal evolution of the heavy metal pollution and historical changes in smelting and waste-treatment proceedings.
451 citations
TL;DR: The isotopic composition of the organic carbon of the suspended particulate matter in the Gironde estuary and the Biscay shelf has been measured on a seasonal basis from 1977 to 1982 as mentioned in this paper.
Abstract: The isotopic composition of the organic carbon of the suspended particulate matter in the Gironde estuary and the Biscay shelf has been measured on a seasonal basis from 1977 to 1982. The δ13C values show a progressive change along the estuary and permit an estimate of the proportion of terrestrial carbon in each sample. It is estimated from these data that up to 80% of the continental POC is mineralized in the estuary and 3–16% of the riverborne flux is exported to the shelf.
130 citations
TL;DR: In this article, sediment traps were placed in several lakes of the “Lago Grande de Curuai” floodplain during different water-level phases: the end of the period of waterlevel reduction (falling water) and the start of the time of water level increase (rising water).
107 citations
TL;DR: In this article, the vertical distribution of redox sensitive species can be explained by the well-established depth sequence of redoxide reactions, based on the bacterially mediated oxidation of organic matter.
107 citations
TL;DR: In this paper, the authors document the historical record (≈70 yr) of contamination from industrial activity along the Garonne River and its tributaries (SW France), through the geochemical study of a sediment core recovered from the inner section of a flood-tidal dock, located in the city of Bordeaux, along the Gare river.
Abstract: In this work, we document the historical record (≈70 yr) of contamination from industrial activity along the Garonne River and its tributaries (SW France), through the geochemical study of a sediment core recovered from the inner section of a flood-tidal dock, located in the city of Bordeaux, along the Garonne River. The chronology of the core was estimated by extrapolation from and interpolation between a few geochemical datums provided by a high resolution137Cs record, the atmospheric initiation of radioactive fallout (∼1952); the maximum of atmospheric radioactive fallout (∼1963) and the Chernobyl accident (1986). Concentrations of Sc, V, Cr, Co, Ni, Cu, Zn, Cd, Sn, U, Pb and the Pb isotope composition were analyzed by ICP-MS, in the ‘ exchangeable ’ fraction.
The pollution impact of a few heavy metals (mostly Pb, Cd, Zn, Sn) was particularly enhanced from 1950 to about 1980, due to the activity of a mining and foundry company located on the Lot, a tributary of the Garonne River. A five-step historical evolution of the foundry's activity is faithfully recorded in the sedimentary record. Despite the fact that the mining activity stopped 20 years ago, and that the contamination seems to be very limited at present, enrichments are still observed in the estuary waters and sediments. These may be due to the release of both particulate and dissolved metals from previously released tailings in the dowstream from the Decazeville mining/foundry site. Over the last 20 years, another kind of pollution by Cr and V is identified, and is related to a different industrial origin, tanneries and electrolysis factories, located along other tributaries of the Garonne River (Dordogne and Tarn). Contamination from local sources (Bordeaux) is negligible compared to the dominant influence of the remote pollution sources.
106 citations
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TL;DR: A review of the principle, the advantages and limitations of X-ray CT itself are presented, together with an overview of some current applications of micro-CT in geosciences.
1,134 citations
TL;DR: A review of the use of carbon isotope ratios (δ13C) and organic carbon to total nitrogen ratios (C/N) to understand changes in palaeocoastal environments and thus position relative to sea-level and/or palaeoriver discharge can be found in this article.
806 citations
TL;DR: A new database on the chemical composition of suspended matter in World Rivers, together with the associated elemental fluxes is presented, showing that riverine fluxes are similar to anthropogenic fluxes, which casts light on the effect of human activities on the cycles of trace elements at the Earth's surface.
572 citations
TL;DR: The concentration of heavy metals in several sites, assessed in water, soil and sediment samples, affected by different pollution sources are reviewed, showing how human activities impact natural media and how the pollution spreads.
490 citations
TL;DR: Lamb's latest book on the earth's changing climate is a carefully crafted work covering four areas: the physical basis of climate and climate change, the methods of climate reconstruction, the history of climate since the height of the last glaciation, and the impact of climate on human affairs as discussed by the authors.
Abstract: H. H. Lamb's latest book on the earth's changing climate is a carefully crafted work covering four areas: the physical basis of climate and climate change, the methods of climate reconstruction, the history of climate since the height of the last glaciation, and the impact of climate on human affairs. The book will be of particular interest to three groups. Atmospheric scientists interested in the long history of climate behavior (but perhaps overwhelmed by Lamb's all-encompassing work on the topic, Climate: Past, Present and Future, vol. II, Methuen, New York), will find Climate History and the Modern World to be a good titration of the fuller work. Scientists in other fields, including social scientists grappling with issues of climate-society interaction, will find the book a good entree into the field. Finally, Lamb himself suggests that the book will be useful to resource managers and other decision makers trying to avoid negative climate impacts. With this last audience in mind, no doubt, Lamb has chosen a style that eschews extensive footnoting and references (though sufficient citations are included to lead to further information). This works quite well and seems reasonable in view of his carefully documented previous writings.
464 citations