搜索结果: 1-15 共查到“地球科学总论 oxygen”相关记录19条 . 查询时间(0.113 秒)
Researchers have found that the extinction at the end of the Permian period coincided with a sudden spike and subsequent drop in the ocean's oxygen content.
Volcanic activity and changes in Earth's mantle were key to rise of atmospheric oxygen（图）
Volcanic activity changes Earth mantle were key rise atmospheric oxygen
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2020/6/19
Oxygen first accumulated in the Earth's atmosphere about 2.4 billion years ago, during the Great Oxidation Event. A long-standing puzzle has been that geologic clues suggest early bacteria were photos...
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
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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...
Numerical simulations of oceanic oxygen cycling in the FAMOUS Earth-System model: FAMOUS-ES, version 1.0
Numerical simulations oceanic oxygen cycling FAMOUS Earth-System model FAMOUS-ES, version 1.0
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2014/12/19
Addition and validation of an oxygen cycle to the ocean component of the FAMOUS climate model are described. At the surface, FAMOUS overestimates northern hemisphere oxygen concentrations whereas, at ...
δ18O water isotope in the iLOVECLIM model (version 1.0) – Part 3: A palaeo-perspective based on present-day data–model comparison for oxygen stable isotopes in carbonates
δ18O water isotope LOVECLIM model A paleo-perspective present-day data–model comparison oxygen stable isotopes carbonates
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2014/12/12
Oxygen stable isotopes (δ18O) are among the most useful tools in palaeoclimatology/palaeoceanography. Simulation of oxygen stable isotopes allows testing how the past variability of these isotopes in ...
Geologists are letting the air out of a nagging mystery about the development of animal life on Earth.
Scientists have long speculated as to why animal species didn’t flourish sooner, once sufficient...
Using the Oxidation State of Iron Plagioclase to Evaluate Magma Oxygen Fugacity: A microXANES Study
Oxidation State Iron Plagioclase Evaluate Magma Oxygen Fugacity A micro XANES Study
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2014/10/22
The goal of this study is to explore the relationship between the oxygen fugacity of a melt and the Fe3+/FeTotal of plagioclase crystals produced from the melt. If the relationship between the two can...
Continuous measurements of atmospheric oxygen and carbon dioxide on a North Sea gas platform
Continuous measurements atmospheric oxygen carbon dioxide North Sea gas platform
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2010/2/8
A new atmospheric measurement station has been established on the North Sea oil and gas production platform F3, 200 km north off the Dutch coast (5°51' N, 4°44' E). Atmospheric concentrations of O2 an...
Increase in water column denitrification during the last deglaciation: the influence of oxygen demand in the eastern equatorial Pacific
water column denitrification the last deglaciation oxygen demand the eastern equatorial Pacific
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2010/1/21
Here we present organic export production and nitrogen isotope results spanning the last 30 000 years from a core recovered off Costa Rica (Ocean Drilling Program (ODP) Site 1242) on the leading edge ...
Increase in water column denitrification during the last deglaciation:the influence of oxygen demand in the eastern equatorial Pacific
water column denitrification last deglaciation oxygen demand eastern equatorial Pacific
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2010/1/7
Here we present organic export production and nitrogen isotope results spanning the last 30 000 years from a core recovered off Costa Rica (Ocean Drilling Program (ODP) Site 1242) on the leading edge ...
Use of O2 airglow for calibrating direct atomic oxygen measurements from sounding rockets
O2 airglow direct atomic oxygen measurements sounding rockets
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2010/2/8
Accurate knowledge about the distribution of atomic oxygen is crucial for many studies of the mesosphere and lower thermosphere. Direct measurements of atomic oxygen by the resonance fluorescence tech...
Coupling of surface pCO2 and dissolved oxygen in the northern South China Sea:impacts of contrasting coastal processes
surface pCO2 dissolved oxygen South China Sea coastal processes
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2010/1/21
We examined the relationship between CO2 partial pressure (pCO2) and dissolved oxygen (DO) based on a cruise conducted in July 2004 to the northern South China Sea (111°–118° E 18°–23° N), spanning fr...
In-situ measurements of oxygen,carbon monoxide and greenhouse gases from Ochsenkopf tall tower in Germany
In-situ measurements oxygen carbon monoxide greenhouse gases Ochsenkopf tall tower
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2010/2/8
We present 2.5 years (from June 2006 to December 2008) of in-situ measurements of CO2, O2, CH4, CO, N2O and SF6 mixing ratios sampled from 23, 90 and 163 m above ground on the Ochsenkopf tower in the ...
Net community production of oxygen derived from in vitro and in situ 1-D modeling techniques in a cyclonic mesoscale eddy in the Sargasso Sea
Net community production oxygen vitro situ 1-D modeling techniques Sargasso Sea
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2010/1/20
It has been proposed that the disagreement traditionally reported between in vitro incubation and in situ estimates of oxygen net community production (NCP) could be explained, at least partially, by ...
Oxygen penetration deep into the sediment of the South Pacific gyre
Oxygen penetration sediment South Pacific gyre
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2010/1/20
Sediment oxygen concentration profiles and benthic microbial oxygen consumption rates were investigated during an IODP site survey in the South Pacific Gyre. Primary production, particle fluxes and se...