Results 231 to 240 of about 572,691 (264)

Seasonal Deuterium Excess Variations of Precipitation at Summit, Greenland, and Their Climatological Significance [PDF]

Journal of Geophysical Research D: Atmospheres, 2019
Abstract The hydrogen and oxygen isotopic composition of ice cores from Summit, Greenland, has provided invaluable information about variations in past climate. However, interpretations of these isotopic data have been made despite a paucity of direct isotopic studies of Summit precipitation. We provide insight to such interpretations
Feng, Xiahong, Leslie Sonder, Ben G Kopeć   +2 more
exaly   +2 more sources

Some of the next articles are maybe not open access.

Related searches:

Deuterium excess reveals diurnal sources of water vapor in forest air

Oecologia, 2010
An understanding of atmospheric water vapor content and its isotopic composition is important if we are to be able to model future water vapor dynamics and their potential feedback on future climate change. Here we present diurnal and vertical patterns of water isotope ratios in forest air (δ(2)H(v) and δ(18)O(v)) not observed previously.
Chun-Ta, Lai, James R, Ehleringer
openaire   +2 more sources

Extreme Deuterium Excesses in Ultracarbonaceous Micrometeorites from Central Antarctic Snow

Science, 2010
Primitive interplanetary dust is expected to contain the earliest solar system components, including minerals and organic matter. We have recovered, from central Antarctic snow, ultracarbonaceous micrometeorites whose organic matter contains extreme deuterium (D) excesses (10 to 30 times terrestrial values), extending over hundreds of square ...
Duprat, J., Dobrica, E., Engrand, C., Aleon, J., Marrocchi, Y., Mostefaoui, S., Meibom, A., Leroux, H., Rouzaud, J.N., Gounelle, M., Robert, F.   +10 more
openaire   +3 more sources

Excess enthalpy of (tetrachloromethane + 2-propanone): deuterium isotope effect

The Journal of Chemical Thermodynamics, 1984
Abstract Excess enthalpies of tetrachloromethane + 2-propanone at 303.15 K and 318.15 K, and + 2-propanone-d6 at 303.15 K, have been measured.
E. Kenyon-Blair, K.W. Morcom
openaire   +1 more source

Excess Heat Production in a Deuterium/Palladium Gas-Solid System

Applied Mechanics and Materials, 2014
In a D-Pd gas-loading system some deuterium atoms were introduced into a palladium wire under the pressure of PD2<1atm and 8A electric current was passed through another palladium wire. The relationship between electric current and excess heat triggered by the current was studied at different conditions of reaction. Evidence of large excess heat was
Xin Lu, Bing Jun Shen, Xin Le Zhao, Li Hong Jin, Jian Tian   +4 more
openaire   +1 more source

Observation of Excess Heat by Activated Metal and Deuterium Gas

Journal of Condensed Matter Nuclear Science, 2017
Reports of heat-generating cold fusion reactions in the nickel–hydrogen system have been increasing. The reactions mainly involve nickel with other additive elements. The authors of these reports emphasized the importance of an extremely clean system in the electrolytic tests in which excess heat was generated.
openaire   +1 more source

Evolution of isotopic composition and deuterium excess of brines in the Sichuan Basin, China

Chinese Journal of Geochemistry, 2012
The isotopic composition and parameters for deuterium excess of brines, which were sampled in the Sichuan Basin, show obvious regularities of distribution. The brine isotopic composition shows distinct two systems of marine and terrestrial deposits, with the Middle Triassic strata as the boundary.
Qiushi Yan, Zhiyou Gao, Shijun Ni, Zeming Shi, Guan Yin   +4 more
openaire   +1 more source

New data of deuterium excess values of glacial ice of Kamchatka

Doklady Rossijskoj akademii nauk. Nauki o Zemle
The isotopic signature (δ18О, δ2Н, d-excess) of the ice of the Ushkovsky volcano in Kamchatka were studied. A new shallow ice core was obtained in 2022 in the Gorshkov crater. The 14 m long ice core was dated by counting annual layers, which were also compared with known eruptions in recent years. The upper 14 m of the glacier were formed over the last
Yu. N. Chizhova, V. N. Mikhalenko, I. A. Korneva, Ya. D. Muravyov, A. G. Hayredinova, M. A. Vorobiev   +5 more
openaire   +1 more source

Excess Heat is Linked to Deuterium Loss in an Aqueous Nickel LANR System

Journal of Condensed Matter Nuclear Science, 2019
These results indicate a loss of deuterium (more precisely, “deuterons”) from ordinary water when excess heat is observed in an aqueous Ni CF/LANR system (Ni/ordinaryH2O/Pt) using a very large cathodic area. The exit gas, from the enclosed electrolytic cell, had an HD/H2 isotopic ratio (3/2 ratio) which was significantly less than originally.
Mitchell R. Swartz, Brian Ahern, Charles Haldemann, Alan Weinberg   +3 more
openaire   +1 more source

Deuterium excess record from central Greenland - modelling and observations

1998
International ...
Johnsen, Sigfus Johann, Hoffmann, G., Stievenaard, M., Jouzel, J., White, J.W.C   +4 more
openaire   +1 more source