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PORTAIL D'INFORMATION GÉOGRAPHIQUE

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  • Geomorphological applications of cosmogenic isotope analysis
  • Bibliography ; Dating ; Erosion rate ; Geochemistry ; Geomorphology ; Isotope analysis ; Mass movement ; Weathering
  • The AA. focus on the geomorphological applications of in situ-produced cosmogenic isotope analysis. The past decade has seen a rapid growth in applications of cosmogenic isotope analysis to a wide range of geomorphological problems
  • 2004
  • Isotopic biogeography
  • Bibliography ; Biogeochemical cycle ; Biogeography ; Carbon ; Climatic variation ; Diet ; Ecosystem ; Geochemistry ; Isotope analysis ; Oxygen 18 ; Photosynthesis
  • The development of biogeography as a science has involved the assimilation of both new concepts and new techniques. Stable isotopes have been used in the study of climatic history, the evolution of the biosphere, the biogechemical cycling
  • 2004
  • Stable carbon isotope record of Holocene environmental change in the central Great Plains
  • C 14 dating ; Climatic variation ; Drought ; Holocene ; Isotope analysis ; Loess ; Nebraska ; Organic materials ; Palaeo-environment ; United States of America
  • First the AA. review the background and methodology behind the use of stable isotopes of carbon in paleoenvironmental research; then, they consult the literature to describe their knowledge of ecosystem and climate change, including recurring
  • 2004
  • Oxygen isotope compositions of phosphate from arvicoline teeth and Quaternary climatic changes, Gigny, French Jura
  • Climatic variation ; France ; Isotope analysis ; Jura ; Oxygen 18 ; Palaeobiogeography ; Palaeoclimate ; Phosphate ; Pleistocene ; Quaternary ; Rodent
  • isotope composition of meteoric water and air temperature.
  • 2004
  • Eau douce ; Eau souterraine ; Hydrochimie ; Hydrogéologie ; Isotope ; Kirov ; Pollution ; Russie d'Europe ; Uranium
  • European part of Russia ; Fresh water ; Groundwater ; Hydrochemistry ; Hydrogeology ; Isotope ; Kirov ; Pollution ; Uranium
  • Etude de la pollution naturelle des eaux douces souterraines par des méthodes utilisant les isotopes de l'uranium et hydrogéochimique multiélémentaire.
  • 2004
  • Dégradation des sols ; Erosion des sols ; Hongrie ; Isotope ; Radioactivité ; Terre arable
  • Arable land ; Hungary ; Isotope ; Radioactivity ; Soil degradation ; Soil erosion
  • This article summarises the first results of a longer experimental study testing the capabilities and the reliability of the radio isotope trace technique on arable land in Hungary. Recent concern regarding the problems of soil degradation
  • 2004
  • Arid area ; Biogeochemical cycle ; Duricrust ; Geochemistry ; Groundwater ; Gypsum ; Isotope analysis ; Sedimentary basin ; Sedimentation ; Tunisia
  • This paper aims to assess the utility of sulphur isotope analysis for providing an insight into the source of the gypsum in the vicinity of the Chott Djerid basin, southern Tunisia. The AA. sampled the isotopic composition of bedrock samples
  • 2004
  • Vegetation dynamics during the late Pleistocene in the Barreirinhas region, Maranhão State, northeastern Brazil, based on carbon isotopes in soil organic matter
  • Brazil ; Carbon ; Charcoal ; Isotope analysis ; Maranhâo ; Organic materials ; Palaeobiogeography ; Pleistocene ; Quaternary ; Soil ; Soil properties ; Vegetation dynamics
  • 2004
  • Oxygen isotopes of bovid teeth as archives of paleoclimatic variations in archaeological deposits of the Ganga Plain, India
  • The AA. have made an attempt to interpret climatic variations during the past 3600 yr using oxygen isotope data from teeth enamel from archaeological sites in the central alluvial plain of the Ganga river. This is the first record of climatic
  • 2004
  • California ; Carbon ; Estuary ; Holocene ; Isotope analysis ; Palaeo-environment ; Palynology ; Pollen diagram ; San Francisco ; Sedimentology ; Tidal marsh ; United States of America
  • Records of stable carbon isotopes (δ13C) are presented from cores collected from 4 San Francisco Bay marshes and used as a proxy for changes in estuary salinity. The 4 marshes included in this study are located along a natural salinity gradients
  • 2004
  • Carbon ; China ; Gansu ; Geochemistry ; Isotope analysis ; Loess ; Organic materials ; Palaeo-environment ; Palaeoclimate ; Palaeosol ; Plateau
  • isotope data) since the last interglaciation and, most importantly, to evaluate its relationship with the δ13C signal of bulk organic matter.
  • 2004
  • Brazil ; Cenozoic ; Geochronology ; Isotope analysis ; Minas Gerais ; Miocene ; Palaeoclimate ; Palaeogeography ; Weathering
  • 2004
  • Bibliography ; Erosion rate ; Isotope analysis ; Model ; Sediment budget ; Soil erosion ; Suspended load ; United Kingdom ; Water erosion ; Watershed
  • 2004
  • Bay ; Coastal environment ; Geochemistry ; Geostatistics ; Isotope analysis ; Magnetic susceptibility ; Martinique ; Pollution ; Sediment transport ; Soil erosion ; Trace-element
  • , estimation des vitesses de sédimentation au débouché des cours d'eau, et construction d'une radioscopie des transferts dans la baie à partir de certains isotopes radioactifs.
  • 2004
  • Agricultural land use ; European part of Russia ; Geochemistry ; Gully erosion ; Human impact ; Hydraulic works ; Hydrometeorology ; Isotope analysis ; Soil erosion ; Stavropol ; Watershed
  • 2004
  • Auvergne ; Biogeochemistry ; Carbon ; Flow ; France ; Isotope analysis ; Lake ; Massif Central ; Natural hazards ; Volcanic eruption ; Water
  • 2004
  • Deglaciation ; Drumlin ; Erosion ; Geomorphometry ; Ice sheet ; Isotope dating ; Numerical model ; Palaeo-environment ; Palaeogeomorphology ; Sweden
  • 2004
  • Arid area ; Erosion rate ; Gully erosion ; Human impact ; Isotope analysis ; New Mexico ; Pastureland ; Sediment budget ; Semi-arid area ; Soil erosion ; United States of America ; Watershed
  • 2004
  • The AA. present new results from a more detailed pollen analytical study combined with a macrofossil-based stable carbon isotopic record, and supported by AMS-based radiocarbon dating, from an intermontane basin bog site in southern New Zealand
  • 2004
  • of Xian. Twelve speleothems samples near the position of palaeowater tables in three cave passages are dated by the 230Th dating method. The results show that these events are close to the interglacial transitions following marine oxygen isotope stages 10
  • 2004