搜索结果: 1-12 共查到“理学 Oxygen-isotopes”相关记录12条 . 查询时间(0.176 秒)
Semi-Lagrangian transport of oxygen isotopes in polythermal ice sheets: implementation and first results
Semi-Lagrangian transport oxygen isotopes polythermal ice sheets implementation first results
2014/12/19
Modelling the evolution of the Earth system on long timescales requires the knowledge and understanding of driving mechanisms, such as the hydrological cycle. This is dominant in all components of the...
Oxygen isotopes as a valuable tool for measuring annual growth in tropical trees that lack distinct annual rings
tropical tree with non-distinct annual rings cellulose oxygen isotopes fractionation model Styrax tonkinensis Ficus semicordata var. semicordata
2017/4/11
Some trees from tropical areas lack visually detectable and consistent annual growth rings. As such, we have measured
the radial variation of cellulose oxygen isotopes in trees that grow in seasonall...
Evolution of the Solar Nebula. IX. Gradients in the Spatial Heterogeneity of the Short-Lived Radioisotopes $^{60}$Fe and $^{26}$Al and the Stable Oxygen Isotopes
Evolution Solar Nebula IX. Gradients Spatial Heterogeneity Short-Lived Stable Oxygen Isotopes
2011/9/27
Short-lived radioisotopes (SLRI) such as $^{60}$Fe and $^{26}$Al were likely injected into the solar nebula in a spatially and temporally heterogeneous manner. Marginally gravitationally unstable (MGU...
Collateral Effects on Solar Nebula Oxygen Isotopes due to Injection of 26Al by a Nearby Supernova
Solar Nebula Oxygen Isotopes 26Al Nearby Supernova
2011/1/10
Injection of material from a core-collapse supernova into the solar system's already-formed disk is one proposed mechanism for producing the short-lived radionuclides, such as 26Al and 41Ca, inferred ...
Sources of Holocene variability of oxygen isotopes in paleoclimate archives
Holocene variability paleoclimate archives oxygen isotopes
2009/12/3
Variability in water isotopes has been captured in numerous archives and used to infer past climate changes. Here we examine water isotope variability over the course of the Holocene using the water-...
Sulphur and Oxygen Isotopes Behaviour in Sulphates of Atmospheric Ground water System Observations and Model
Sulphur Oxygen Isotopes Behaviour Atmospheric Ground water System
2009/10/26
Comparison of sulphate concentrations in groundwaters and atmospheric precipitation
suggests that about 30 % of groundwater sulphate may be of atmospheric
origin. Another source of sulphate ion is t...
Spatial variations in time-integrated plankton metabolic rates in Sagami Bay using triple oxygen isotopes and O2 : Ar ratios
Spatial variations plankton metabolic rates
2014/4/21
Plankton metabolic rates, such as rates of gross, net community production and community respiration, were
measured in the surface waters using triple oxygen isotopes and O2
: Ar ratios. The 17
D a...
Short-term variation of triple oxygen isotopes and gross oxygen production in the Sagami Bay, central Japan
Short-term variation triple oxygen isotopes gross oxygen production Sagami Bay central Japan
2014/5/4
We studied diurnal and daily variations in triple oxygen isotopes in the euphotic zone of the Sagami Bay during summer 2003 and 2004. There were sharp changes in physical processes, driven by changes ...
Seasonal variations in triple oxygen isotopes and gross oxygen production in the Sagami Bay, central Japan
Seasonal variations triple oxygen isotopes gross oxygen production Sagami Bay central Japan
2014/5/9
We studied daily, diurnal, and seasonal variations in triple oxygen isotopes in the Sagami Bay from May to October 2002. The variations in composition of triple oxygen isotopes are in association with...
Abrasion-ablation models and the empirical EPAX parametrization of projectile fragmentation are described. Their cross section predictions are compared to recent data of the fragmentation of secondary...
Evaluation of community respiratory mechanisms with oxygen isotopes: A case study in Lake Kinneret
community respiratory mechanisms oxygen isotopes Lake Kinneret
2014/5/26
Gross and net O2 production between May 1996 and February 1999 was determined in bottle incubation experiments with H218O spike and from the change in O2 concentration. Carbon fixation rates were obta...
Oxygen Isotopes and the Extent of Diagenesis of Clay Minerals during Sedimentation and Burial in the Sea
Diagenesis Gulf of Mexico Isotope Mississippi River Oxygen Sedimentation Smectite
2012/1/12
Oxygen isotope ratios of <0.1-µm smectite in bottom sediments of the Mississippi River and the Gulf of Mexico near the mouth of the river have been determined to investigate diagenesis of land-d...