Journal ArticleDOI
Standard for Reporting Concentrations of Deuterium and Oxygen-18 in Natural Waters.
TLDR
A standard, based on the set of ocean water samples used by Epstein and Mayeda to obtain a reference standard for oxygen-18 data, but defined relative to the National Bureau of Standards isotopic reference water sample, is proposed for reporting both deuterium and oxygen- 18 variations in natural watersrelative to the same water.Abstract:
A standard, based on the set of ocean water samples used by Epstein and Mayeda to obtain a reference standard for oxygen-18 data, but defined relative to the National Bureau of Standards isotopic reference water sample, is proposed for reporting both deuterium and oxygen-18 variations in natural waters relative to the same water. The range of absolute concentrations of both isotopes in meteoric-waters is discussed.read more
Citations
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Calculated fractionation factors for carbon and hydrogen isotope exchange in the system calcite-carbon dioxide-graphite-methane-hydrogen-water vapor
TL;DR: Isotopic fractionation factors have been calculated for deuterium exchange between hydrogen, water vapor and methane, and for carbon-13 exchange between graphite, calcite, carbon dioxide and methane as mentioned in this paper.
Journal ArticleDOI
Fractionation of carbon and hydrogen isotopes by methane-oxidizing bacteria
TL;DR: In this paper, the authors used carbon and hydrogen isotopic analysis to identify the source of a gas that has been partially oxidized by a bacteria, which can significantly change the carbon isotopic composition of the gas.
Journal ArticleDOI
Evolution of the isotopic composition of atmospheric waters in the Mediterranean Sea area
J. R. Gat,I. Carmi +1 more
TL;DR: The isotopic composition of rain in the Levant is a reflection of the modification of continental air masses by interaction with the warm Mediterranean Sea, and the detailed pattern of evolution of Levantine air has been studied by an isotopic survey of rain from twenty coastal and island stations in the eastern Mediterranean Sea area as discussed by the authors.
Journal ArticleDOI
On the enrichment of H2 18-O in the leaves of transpiring plants.
TL;DR: Using a simple box model for transpiring leaves a quantitative understanding of the isotope fractionation is possible which is well confirmed by the results of model experiments as well as by measurements on trees.
Journal ArticleDOI
Primordial neon, helium, and hydrogen in oceanic basalts
Harmon Craig,John E. Lupton +1 more
TL;DR: A primordial neon component in neon from Kilauea Volcano and deep-sea tholeiite glass has been identified by the presence of excess 20Ne; relative to atmospheric neon the 20Ne enrichments are 54% in Kilea neon and about 25% in the basalts The 20Ne anomalies are associated with high 3He/4He ratios.
References
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Journal ArticleDOI
Isotopic Variations in Meteoric Waters
TL;DR: The relationship between deuterium and oxygen-18 concentrations in natural meteoric waters from many parts of the world has been determined with a mass spectrometer and shows a linear correlation over the entire range for waters which have not undergone excessive evaporation.
Journal ArticleDOI
Isotopic standards for carbon and oxygen and correction factors for mass-spectrometric analysis of carbon dioxide
TL;DR: In this paper, Niee's and Solenhofen standards were compared to the Chicago PDB standard for carbon and oxygen isotope ratios, and the correction factors for instrumental effects and for the nature of the mass spectra were derived.
Journal ArticleDOI
Variation of O18 content of waters from natural sources
S Epstein,Toshiko K. Mayeda +1 more
TL;DR: A number of marine water and fresh water samples were examined for the relative O18O16 ratio, and the variation of this ratio was determined to a precision of ± 1% as mentioned in this paper.
Journal ArticleDOI
Effect of Low Concentrations of Carbon Dioxide on Photosynthesis Rates of Two Races of Oxyria.
TL;DR: Alpine plants of Oxyria digyna have higher apparent photosynthesis rates at various carbon dioxide concentrations than arctic, sea-level plants of the same species, which may be involved in the survival of plants at high elevations.