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Variations in atmospheric oxygen levels shaped Earth’s climate through the ages
oxygen levels Earth’s climate
2015/6/18
Variations in the amount of oxygen in Earth's atmosphere significantly altered global climate throughout the planet's history. Efforts to reconstruct past climates must include this previously overloo...
The period of extended low oxygen, which spanned from roughly 2 to less than 1 billion years ago, was a time of remarkable chemical stability in the Earth's oceans and atmosphere. A University of Cali...
Oxygen isotopic signature of CO2 from combustion processes
Oxygen isotopic CO2 combustion processes
2011/2/25
For a comprehensive understanding of the global carbon cycle precise knowledge of all processes is necessary. Stable isotope (13C and 18O) abundances provide information for the qualification and the ...
Anthropogenic imprints on nitrogen and oxygen isotopic composition of precipitation nitrate in a nitrogen-polluted city in southern China
nitrogen oxygen isotopic precipitation nitrate a nitrogen-polluted city southern China
2011/2/25
Nitric acid (HNO3) or nitrate (NO3−) is the dominant sink for reactive nitrogen oxides (NOx = NO + NO2) in the atmosphere. In many Chinese cities, HNO3 is becoming a significant contributor to a...
Investigation of the correlation between odd oxygen and secondary organic aerosol in Mexico City and Houston
the correlation odd oxygen and secondary organic aerosol Mexico City Houston
2010/10/11
Many recent models underpredict secondary organic aerosol (SOA) particulate matter (PM) concentrations in polluted regions, indicating serious deficiencies in the models' chemical mechanisms and/or mi...
Atmospheric oxygen and carbon dioxide observations from two European coastal stations 2000–2005: continental influence, trend changes and APO climatology
Atmospheric oxygen carbon dioxide European coastal APO climatology
2010/2/21
Seeking for baseline conditions has biased the atmospheric carbon dioxide (CO2) and later on also oxygen (O2) monitoring networks towards remote marine stations, missing part of the variability that i...
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-...
Simulations of climate effects on water temperature, dissolved oxygen, and ice and snow covers in lakes of the contiguous U.S. under past and future climate scenarios
Simulations of climate effects on water temperature, dissolved oxygen, and ice and snow covers in lakes of the contiguous U.S. under past and future climate scenarios
2014/4/17
Daily water temperature, dissolved oxygen (DO) profiles, and ice and snow covers (where applicable) were simulated for 27 types of small lakes (up to 10 km2 surface area) at 209 locations in the conti...
Quantifying atmospheric nitrate formation pathways based on a global model of the oxygen isotopic composition (Δ17O) of atmospheric nitrate
Quantifying atmospheric nitrate formation pathways oxygen isotopic composition atmospheric nitrate
2009/8/7
The oxygen isotopic composition (Δ17O) of atmospheric nitrate is a function of the relative abundance of atmospheric oxidants (O3, ROx=OH+HO2+RO2) and the formation pathway of nitrate from its precurs...
Modelling the impact of noctilucent cloud formation on atomic oxygen and other minor constituents of the summer mesosphere
noctilucent cloud formation atomic oxygen minor constituents summer mesosphere
2009/2/8
The formation, evolution and eventual sublimation of noctilucent clouds (NLC) may have a significant effect on the odd oxygen and hydrogen chemistry of the high latitude summer mesosphere. Three mecha...
Improving cloud information over deserts from SCIAMACHY Oxygen A-band measurements
cloud information desert SCIAMACHY Oxygen A-band measurement
2008/12/30
The retrieval of column densities and concentration profiles of atmospheric trace gas species from satellites is sensitive to light scattered by clouds. The SCanning Imaging Absorption SpectroMeter f...
Nitrogen and oxygen isotopic constraints on the origin of atmospheric nitrate in coastal Antarctica
Nitrogen oxygen isotopic constraint atmospheric nitrate coastal Antarctica
2008/12/8
Throughout the year 2001, aerosol samples were collected continuously for 10 to 15 days at the French Antarctic Station Dumont d'Urville (DDU) (66°40' S, l40°0' E, 40 m above mean sea level). The nitr...
Long-term observation of mass-independent oxygen isotope anomaly in stratospheric CO2
mass-independent oxygen isotope anomaly stratospheric CO2
2008/11/24
Stratospheric and upper tropospheric air samples were collected during 1994–2004 over Sanriku, Japan and in 1997 over Kiruna, Sweden. Using these archived air samples, we determined the triple oxygen-...
Detection of regional scale sea-to-air oxygen emission related to spring bloom near Japan by using in-situ measurements of the atmospheric oxygen/nitrogen ratio
sea-to-air oxygen emission spring bloom Japan atmospheric oxygen/nitrogen ratio
2008/11/11
We have been carrying out in-situ monitoring of atmospheric O2/N2 ratio at Cape Ochi-ishi (COI; 43°10' N, 145°30' E) in the northern part of Japan since March 2005 by using a modified gas chromatograp...
Anomalous flow below 2700 m in the EPICA Dome C ice core detected using δ18O of atmospheric oxygen measurements
EPICA Dome C ice core atmospheric oxygen
2008/11/6
While there are no indications of mixing back to 800 000 years in the EPICA Dome C ice core record, comparison with marine sediment records shows significant differences in the timing and duration of...