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
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A study on hydrochemical characteristics of surface and sub-surface water in and around Perumal Lake, Cuddalore district, Tamil Nadu, South India
TL;DR: In this paper, the water samples (surface water = 16; groundwater = 12) were analyzed for various physicochemical attributes like pH, electrical conductivity (EC), sodium (Na+), potassium (K+), calcium (Ca2+), magnesium (Mg 2+), chloride (Cl−), bicarbonate (HCO3 −), sulfate (SO4 −), phosphate (PO4), silica (H4SiO4) and total dissolved solids (TDS).
Suppression of bottom water formation in the southeastern Weddell Sea
Eberhard Fahrbach,Ray G. Peterson,Ray G. Peterson,Gerd Rohardt,Peter Schlosser,Reinhold Bayer +5 more
TL;DR: In this article, the lack of bottom water formation in the southeastern Weddel Sea is investigated on the basis of CTD, current meter, and oxygen isotope data obtained in 1986 during the Winter Weddell Sea Project and in summer 1989 during the European Polastern Study.
Journal ArticleDOI
Origin of the shallow groundwater system in the southern Voltaian Sedimentary Basin of Ghana: an isotopic approach
S.Y. Acheampong,John W. Hess +1 more
TL;DR: Stable and radioactive isotope data have been used to investigate the source of recharge and the age of the shallow groundwater system within the southern Voltaian Sedimentary Basin (SVSB) of Ghana as part of an on-going groundwater development project as discussed by the authors.
Journal ArticleDOI
Chemical and isotopic investigations into the origin of clay minerals from the Galapagos hydrothermal mounds field
TL;DR: A dark green authigenic nontronite is the major component of the Galapagos hydrothermal mounds field sediments, and its isotopic compositions of the chemically purified, in situ mounds temperatures of up to 15°C are calculated in this article.
Journal ArticleDOI
Isotope dilution spaces of mice injected simultaneously with deuterium, tritium and oxygen-18.
Elżbieta Król,John R. Speakman +1 more
TL;DR: The correlations that were detected strongly suggest that variation in the observed dilution space ratio was mostly physiological rather than analytical, and thus which values should be employed for TBW and DLW calculations.
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.