Climatic variation ; Historical climate ; Isotope analysis ; Oxygen 18 ; Palaeoclimatology ; Research technique ; Temperature ; Time series
ce même hémisphère reconstituées pour la période 200-1995, des températures moyennes planétaires à l'Holocène déduites des variations du taux de l'isotope O 18 de l'oxygène, enfin des événements Dansgaard-Oeschger au Groenland. – (JPB)
Asian part of Russia ; Geochemistry ; Hydrochemistry ; Hydrogene ; Hydrothermal ; Isotope analysis ; Kamchatka ; Meteoric water ; Oxygen 18 ; Valley of geysers ; Volcanism ; Water vapor
Kamtchatka. Il est prouvé que l’eau des sources a une concentration isotopique plus importante que la vapeur des gaz. L’analyse de la distribution du δ 18 O et du δ D des eaux hydrothermales a démontré la présence de liens génétiques entre les eaux thermales
This study reviews the principles of fractionations affecting δD, δO 18 and deuterium excess (d) in meteoric precipitation and during equilibrium freezing of water under changing freezing rates. Many studies are starting to use the calculation of d
Arctic Region ; Asian part of Russia ; Deuterium ; Geochemistry ; Holocene ; Ice wedge ; Isotope analysis ; Oxygen 18 ; Palaeo-environment ; Palaeoclimate ; Permafrost ; Siberia
The stable isotopic composition (andO 18, andD, d) of 3 Holocene-age ice wedges at the Dmitrii Laptev Strait was studied at high resolution in order to develop palaeoclimatic records. AMS C 14 ages of organic matter in the ice prove the Late
Holocene age of the studied horizontal ice-wedge profiles and indicate syngenetic growth associated with sediment accumulation. A general Late Holocene winter warming trend is inferred from andO 18 data with periods of marked variability superimposed
Here the AA. present 2 nearly continuous time-series of δD and δO 18 of atmospheric water vapor (δv) measured at hourly intervals in surface air in Beijing and above a winter wheat canopy in Shijiazhuang using in-situ measurement technique. During
Arctic Region ; Asian part of Russia ; Deuterium ; Geochemistry ; Holocene ; Ice wedge ; Isotope analysis ; Oxygen 18 ; Palaeo-environment ; Palaeoclimate ; Pleistocene
This paper reports the results of oxygen (andO 18) and hydrogen (andD) isotopic analyses of ice wedges of different generations at 3 sites on the western Taymyr coast. Palaeotemperature reconstruction based on the data shows that winter temperatures
Análisis isotópico ; Canada ; Cuña de hielo ; DataciónCarbono 14 ; Geoquímica ; Hielo del suelo ; Oxígeno18 ; Pergelisol ; Pingo ; Región polar ; Zona fría ; Ártica
Analyse isotopique ; Arctique ; Canada ; Coin de glace ; Datation C 14 ; Glace du sol ; Géochimie ; Oxygène 18 ; Pergélisol ; Pingo ; Région polaire ; Zone froide
Arctic Region ; C 14 dating ; Canada ; Cold area ; Geochemistry ; Ground ice ; Ice wedge ; Isotope analysis ; Oxygen 18 ; Permafrost ; Pingo ; Polar region
, when the region experienced widespread continental-scale glaciation. The ratios O 18/O 16 are analysed. Placing the ice bodies into a time frame can be accomplished either through age dating of the enclosing sediments and encased organics, or by direct
Antártica ; Análisis isotópico ; Cuña de hielo ; Deuterio ; Geoquímica ; Hielo del suelo ; Isla Victoria ; Oxígeno18 ; Periglaciar ; Régimen térmico
Analyse isotopique ; Antarctique ; Coin de glace ; Deutérium ; Glace du sol ; Géochimie ; Oxygène 18 ; Périglaciaire ; Régime thermique ; Sublimation ; Victoria Island
Antarctica ; Deuterium ; Geochemistry ; Ground ice ; Ice wedge ; Isotope analysis ; Oxygen 18 ; Periglacial features ; Sublimation ; Thermal regime ; Victoria Island
This paper reports the results of oxygen (andO 18) and hydrogen (andD) isotopic analyses of ice wedges and a five-year monitoring programme on the ice-wedge thermal regime at three sites in northern Victoria Land. The purpose of the study
Agua fluvial ; Análisis isotópico ; Capa acuífera ; Corriente de agua ; Geoquímica ; Oxígeno18 ; Precipitación ; Rusia de Europa ; Variabilidad estacional
Aquifer ; European part of Russia ; Fluvial water ; Geochemistry ; Isotope analysis ; Oxygen 18 ; Precipitation ; Protva River ; Seasonal variability ; Stream