Tidal inlet response to sediment infilling of the associated bay and possible implications of human activities: the Marennes-Oléron Bay and the Maumusson Inlet, France
(Continental Shelf Research. vol. 25, n° 0278-4343, pp. 1115-1131, 01/06/2005)
CLDG, ULR, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, BRGM
Radionuclides transfer between water and atmosphere in the Loire estuary (FLORE project)
In estuaries, volatiles radionucleides (14 C, 3 H, 131 I) originating from anthropogenic liquid waste release from nuclear reactor or hospitals are potentially transferable to the atmosphere. Due to the high biologic activity, the degradation of organic matter produce carbon dioxide fluxes to the atmosphere allowing transfer of 14 CO 2 released by nuclear industry. Similarly tritium is transfered to the atmosphere trough evaporation process. We present here, results obtained during FLORE-1 cruise in February 2003, a winter period when biological activity is supposed to be low. The first results of iodine 131 distribution and estimations of radiocarbon and tritium fluxes are presented.
(Radioprotection. vol. 40, n° 0033-8451, pp. S557-S562, 01/05/2005)
LSCE, UVSQ, INSU - CNRS, CNRS, DRF (CEA), CEA, GEOTRAC, LSCE, UVSQ, INSU - CNRS, CNRS, DRF (CEA), CEA, IRSN/PSE-ENV/SRTE/LRC, IRSN/PSE-ENV/SRTE, IRSN, EAMEA, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS
Synergic effect of gold mining and damming on mercury contamination in fish
(Environmental Science and Technology. vol. 39, n° 0013-936X, pp. 2248-2254, 15/04/2005)
EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, UR MALY, IRSTEA, LMBA, UBS, UBO EPE, CNRS, IFREMER
Reconstruction of sea-surface temperatures from assemblages of planktonic foraminifera: multi-technique approach based on geographically constrained calibration data sets and its application to glacial Atlantic and Pacific Oceans
(Quaternary Science Reviews. vol. 24, n° 0277-3791, pp. 951-998, 01/04/2005)
CAU, CAM, NTOU, CEOAS, OSU, ANU, LSCE, UVSQ, INSU - CNRS, CNRS, DRF (CEA), CEA, PALEOCEAN, LSCE, UVSQ, INSU - CNRS, CNRS, DRF (CEA), CEA, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, UoN
Multiproxy approach for the reconstruction of the glacial ocean surface (MARGO)
(Quaternary Science Reviews. vol. 24, n° 0277-3791, pp. 813-819, 01/04/2005)
RHUL, ICTA, UAB, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, LSCE, UVSQ, INSU - CNRS, CNRS, DRF (CEA), CEA, PALEOCEAN, LSCE, UVSQ, INSU - CNRS, CNRS, DRF (CEA), CEA, CAU
Sea-surface temperature and sea ice distribution of the Southern Ocean at the EPILOG Last Glacial Maximum—a circum-Antarctic view based on siliceous microfossil records
Based on the quantitative study of diatoms and radiolarians, summer sea-surface temperature (SSST) and sea ice distribution were estimated from 122 sediment core localities in the Atlantic, Indian and Pacific sectors of the Southern Ocean to reconstruct the last glacial environment at the EPILOG (19.5-16.0 ka or 23 000-19 000 cal yr. B.P.) time-slice. The statistical methods applied include the Imbrie and Kipp Method, the Modern Analog Technique and the General Additive Model. Summer SSTs reveal greater surface-water cooling than reconstructed by CLIMAP (Geol. Soc. Am. Map Chart. Ser. MC-36 (1981) 1), reaching a maximum (4-5 1C) in the present Subantarctic Zone of the Atlantic and Indian sector. The reconstruction of maximum winter sea ice (WSI) extent is in accordance with CLIMAP, showing an expansion of the WSI field by around 100% compared to the present. Although only limited information is available, the data clearly show that CLIMAP strongly overestimated the glacial summer sea ice extent. As a result of the northward expansion of Antarctic cold waters by 5-101 in latitude and a relatively small displacement of the Subtropical Front, thermal gradients were steepened during the last glacial in the northern zone of the Southern Ocean. Such reconstruction may, however, be inapposite for the Pacific sector. The few data available indicate reduced cooling in the southern Pacific and give suggestion for a non-uniform cooling of the glacial Southern Ocean. This study is part of MARGO, a multiproxy approach for the reconstruction of the glacial ocean surface. r
(Quaternary Science Reviews. vol. 24, n° 0277-3791, pp. 869-896, 01/04/2005)
AWI, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, AWI
La Grande Vasière : architecture, mise en place et estimation des facteurs de son évolution.
(22/03/2005)
GM, IFREMER, M2C, UNICAEN, NU, INSU - CNRS, UNIROUEN, NU, CNRS, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, LDO, INSU - CNRS, UBO EPE, CNRS, LSCE, UVSQ, INSU - CNRS, CNRS, DRF (CEA), CEA, NU
Goldmining and mercury contamination of the piscivorous fish Hoplias aimara in French Guiana (Amazon Basin)
(Ecotoxicology and Environmental Safety. vol. 60, n° 0147-6513, pp. 315-323, 01/03/2005)
LMBA, UBS, UBO EPE, CNRS, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS
Longshore sediment movements from tracers and models, Praia de Faro, South Portugal
This work aims to improve the knowledge of sediment circulation in the coastal zone, focusing on the quantification of sediment movement due to longshore drift. The studied field site is the Praia de Faro beach on the Peninsula do Anca˜o in Algarve (Portugal), which is located on the updrift coast of the Barra Nova tidal inlet. The main objective of the study was to quantify the sediment transport rate that will enter in the inlet system. Measurements were undertaken during low hydrodynamic conditions prevailing in this area and permitted to estimate a longshore transport rate of 2.6–4.2 m/s, consistent with other transport estimations in Algarve. Four theoretical models for longshore transport rate calculation were confronted to tracer results to choose a extrapolation tool. KAMPHUIS (1991) formula appeared to be the more appropriate in this area. It was used to extrapolate the results in order to be compared to the observed morphological evolution. The calculated short term sediment flux (10500 m3/ month) corresponds to the accretion on the updrift swash platform of the Barra Nova tidal inlet and is thus considered to be the contribution of the adjacent coast to this system. Moreover, the estimated longshore transport rate permit us to predict a spit progradation of 60–70 m/year. This result is consistent with the observed migration rate of the Barra Nova inlet during the last 25 years. This study shows that, with a good knowledge of the environmental context, sediment fluxes obtained by sand tracers are accurate enough to estimate the long term longshore transport and long term morphological response of a stretch of shoreline.
(Journal of Coastal Research. vol. 21, n° 0749-0208, pp. 146-156, 01/01/2005)
BRGM, BIAF, UA, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS
Les dépôts de lobes turbiditiques du lac du Lauzanier (Ubaye, France)
(22/02/2026)
GR, UR, INSU - CNRS, CNRS, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS