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
More filters
Journal ArticleDOI
Combined use of 15N and 18O of nitrate and 11B to evaluate nitrate contamination in groundwater
TL;DR: Isotopic composition of NO 3 ( δ 15 N NO 3 and δ 18 O NO 3 ) and B( δ 11 B) were used to evaluate NO 3 contamination and identify geochemical processes occurring in a hydrologically complex Basin and Range valley in northern Nevada as mentioned in this paper.
Journal ArticleDOI
Mass spectrometer correction factors for the determination of small isotopic composition variations of carbon and oxygen
TL;DR: In this paper, the experimental determination of five different correction factors and their application in the data reduction are discussed, as well as the experimental analysis of the experimental results and their applications in data reduction.
Journal ArticleDOI
Natural gas formation in the western Nile delta (Eastern Mediterranean): Thermogenic versus microbial ☆
TL;DR: In this paper, a regional geochemical study was performed on 38 test gases collected from 9 Neogene western Nile delta discoveries to determine whether microbial or thermogenic processes are the dominant generation pathways of methane.
Journal ArticleDOI
Climatic controls on water vapor deuterium excess in the marine boundary layer of the North Atlantic based on 500 days of in situ, continuous measurements
Hans Christian Steen-Larsen,Hans Christian Steen-Larsen,Arny E. Sveinbjörnsdottir,Andrew Peters,Valérie Masson-Delmotte,Mark Guishard,Gregor Hsiao,Jean Jouzel,David Noone,Joseph Warren,James W. C. White +10 more
TL;DR: In this article, continuous, in situ measurements of water vapor isotopic composition have been conducted in the North Atlantic, at the Bermuda Islands (32.26° N, 64.88° W), between November 2011 and June 2013, using a cavity ring-down spectrometer water vapor analyzer and an autonomous self-designed calibration system.
Journal ArticleDOI
Tuff life: Bioalteration in volcaniclastic rocks from the Ontong Java Plateau
TL;DR: In this article, microscopic textural, geochemical, isotopic, and biomolecular evidence for microbial alteration of glass shards in a 337.7 m thick sequence of poorly sorted vitric and lithic tuffs recovered during Leg 192 of the Ocean Drilling Program on the Ontong Java Plateau was reported.
References
More filters
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.