Continentalwater cycle and carbon reservoirs and their relationships in the past
Biogeochemistry ; Biomass ; Carbon cycle ; Geochemistry ; Global change ; Holocene ; Pleistocene ; Water cycle
In short review paper, the A. discusses the role of studies on changes in the continentalwater cycle for a better understanding of temporal change in biomass production and carbon storage. All calculations made for the late Pleistocene and Holocene
. To a large extend, the present-day picture of the water cycle and biomass production is tranformated by man. - (DG)
Genesis of an endoreic piezometric coastal depression in sub-Sahelian Western Africa : the Continental Terminal Aquifer of Trarza (Mauritania)
Aquifer ; Coastal environment ; Drinking water ; Evapotranspiration ; Groundwater ; Mauritania ; Model ; Quaternary ; Sea level ; Water resources
(Continental Terminal) during the Quaternary. It highlights the dominant role of evaporation in the evolution of water table of the Trarza aquifer, whose impact is similar to the one of the Quaternary marine level increase.
The Trarza Aquifer is the main resource of drinkable water for Nouakchott. After reviewing the main mathematical models for piezometric depression, this study attempts a conceptualization of the piezometric evolution of this phreatic aquifer
La pente et le glacis continental de Nouvelle Ecosse ont été l'objet d'une épaisse sédimentation depuis l'ouverture de l'Atlantique Nord au Jurassique. Le plateau continental a été exposé à l'érosion sub-aérienne au Pléistocène. De nombreux petits
Agua continental ; Concepto ; Gestión del agua ; Hidrología ; Hungría ; Precipitación ; Riesgo natural ; Subida de agua
In the study the three main types of inland excess water formation are presented : the accumulative, the upwelling and the queuing up inland excess water. The criteria of the formation are described, with special regard to the pedological reasons
Algeria ; Arid land ; Desert ; Development ; Evapotranspiration ; Farming;Agriculture ; Ground water ; Hydrogeology ; Irrigation ; Oasis ; Sahara ; Water ; Water resources
Les réserves en eau du désert algérien contenues dans les deux grands systèmes aquifères du Continental Intercalaire et du Continental Terminal sont suffisantes pour irriguer 100 000 hectares. Présentation et discussion du « Projet des Oasis de l'an
Modelling the Quaternary evolution of shore platforms and erosional continental shelves
Coastal dynamics ; Coastal environment ; Coastal erosion ; Continental shelf ; Glacial features ; Interglacial ; Intertidal zone ; Model ; Quaternary ; Sea level ; Shore platform
This paper discusses the use of a mathematical wave erosion model to study the effect of glacially induced sea level changes on the development of shore platforms and erosional continental shelves during the Quaternary. The model used two deep-water
threshold related to the strength of the rocks, the number of hours each year in which the water level is at each intertidal elevation and the amount and persistence of the debris at the cliff foot.
Conditions de formation et d’écoulement des eaux du plateau continental dans les différentes zones aquatiques de l’Arctique et de l’Antarctique
Antarctica ; Arctic Region ; Comparative study ; Continental shelf ; Continentalwater ; Hydrometeorology ; Model ; Runoff ; Thermocline ; Topography ; Water
Agua ; Agua continental ; Antártica ; Escorrentía ; Estudio comparativo ; Hidrometeorología ; Modelo ; Plataforma continental ; Topografía ; Ártica
Analyse comparative des conditions topographiques et hydrométéorologiques de formation et d’écoulement des eaux du plateau continental dans les différentes zones aquatiques de l’Arctique et de l’Antarctique. L’A. remarque certaines similitudes des
Antarctica ; Baroclinity ; Barotropic ; Continental shelf ; Continental slope ; Density gradient ; Oceanic front ; Oceanology ; Water temperature
Antarctique ; Baroclinicité ; Barotrope ; Front océanique ; Gradient de densité ; Océanologie ; Plate-forme continentale ; Talus continental ; Température de l'eau
Antártica ; Frente oceánico ; Gradiente de densidad ; Oceanología ; Plataforma continental ; Talud continental ; Temperatura del agua
Grâce à la surveillance à haute résolution spatiale, effectuée sur la plate-forme et le talus continental de la mer de l’Entente et dans la baie de Prus en Antarctique, les AA. ont pu analyser la structure thermohaline locale du front de pente
Comparison NOAA / AVHRR-2 sea surface temperatures with surface measurements in coastal waters
Les transects de température obtenus par satellite reproduisent bien la reversion saisonnière des gradients du plateau continental et les structures thermiques plus fines. - (CB)
More on deep glacial erosion by continental ice sheets and their tongues of distributary ice
High latitude intracontinental seaways occupy great troughs carved by broad tongues of inland ice as it debouched to deep marine water. Such troughs occur in glaciated coasts, but not in stable, nonglaciated ones. Where ice flowed across them
Remnants of an ancient forest on the continental shelf of northwest Japan
Tree stumps in a standing position have been discovered in 20 to 40 meters of water in Toyama Bay. Radiocarbon dated samples from two of these stumps yielded ages of 8480 70 and 9060 80 years B.P. indicating that the stumps are remnants of a forest
Carbon ; Continental slope ; Isotope analysis ; New Zealand ; North Island ; Oxygen 18 ; Palaeoclimatology ; Palynology ; Pollen diagram ; Quaternary ; Sea floor ; Tephrochronology
Zealand continental slope and rise in water depths of 1688 to 2585 m. Subaerially erupted tephra from North Island within all three cores provide marker horizons to relate paleoceanographic changes with late Quaternary paleoclimatic records from north