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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Spatial variability of environmental isotope and chemical content of precipitation in Jordan and evidence of slight change in climate
TL;DR: The spatial variability of the δ18O and δD compositions of rain is attributed to variations in amount of precipitation (PPT), altitude effect, and air masses originating from different sources as discussed by the authors.
Journal ArticleDOI
Hydrogeochemical and isotopic characteristics of groundwater in Mbanga, Njombe and Penja (Banana Plain) - Cameroon
Andrew Ako Ako,Jun Shimada,Takahiro Hosono,Kimpei Ichiyanagi,George Elambo Nkeng,Gloria Eneke Takem Eyong,Ntankouo Njila Roger +6 more
TL;DR: The isotopic contents of groundwaters ranged from −4.2 to −2.1 for δ 18 O, from −23.4 to −10.6 and from 0.6 to 1.4 TU for tritium as discussed by the authors.
Journal ArticleDOI
Seawater residence times of some elements of geochemical interest and the salinity of the oceans
TL;DR: In this article, a classification of geochemical interest (B, C, N, Na, Mg, Si, P, S, Cl, Ca, K, Li and Sr) is proposed accordingly to the solubility products of their main host minerals as well as their biological reactivity in the seawater column.
Journal ArticleDOI
The problem of identifying arsenic anomalies in the basin of Sahand dam through risk-based 'soft modelling'.
TL;DR: The paper contributes towards next generation best practice through introducing 'OSPRC cells' to capture unique idiosyncrasies at each cell, and suggesting a 'soft modelling' procedure based on assembling knowledgebase of existing techniques with partially converging and partially diverging information levels, where knowledgebase invokes model equations with increasing resolutions.
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Impact du changement climatique sur la ressource en eau en milieu semi-aride : exemple du bassin d'Essaouira (Maroc)
TL;DR: In this article, the authors discuss the importance of the Bassin d’Essaouira basin dans l’approvisionnement en eau de la ville d'EssaOUira and des agglomerations avoisinantes, tente d'etudier l'effet du changement climatique sur la ressource in eau dans cette zone.
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.