Nitrogen evolution within the Earth's atmosphere–mantle system assessed by recycling in subduction zones
Sign Up to like & getrecommendations! Published in 2018 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2017.11.045
Abstract: Abstract Understanding the evolution of nitrogen (N) across Earth's history requires a comprehensive understanding of N's behaviour in the Earth's mantle – a massive reservoir of this volatile element. Investigation of terrestrial N systematics also… read more here.
Keywords: mantle; evolution; subduction zones; subduction ... See more keywords
Did Bacterial Enzymes Cap the Oxygen in Early Earth’s Atmosphere?
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DOI: 10.1029/2019eo134065
Abstract: A new theory suggests that nitrogenase from cyanobacteria could be the reason oxygen levels remained low after the Great Oxidation Event. read more here.
Keywords: bacterial enzymes; early earth; cap oxygen; oxygen early ... See more keywords
Anoxygenic photosynthesis and the delayed oxygenation of Earth’s atmosphere
Sign Up to like & getrecommendations! Published in 2019 at "Nature Communications"
DOI: 10.1038/s41467-019-10872-z
Abstract: The emergence of oxygenic photosynthesis created a new niche with dramatic potential to transform energy flow through Earth’s biosphere. However, more primitive forms of photosynthesis that fix CO2 into biomass using electrons from reduced species… read more here.
Keywords: oxygenation; oxygenation earth; earth; anoxygenic photosynthesis ... See more keywords
Ultraviolet scattering polarization from space particles entering Earth atmosphere
Sign Up to like & getrecommendations! Published in 2024 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stae2730
Abstract: Space material from leftovers of comets and asteroids is daily entering the Earth atmosphere. Traditionally, this influx has been characterized from ground-based observations or through meteorite searches. However, cosmic dust and small meteoroids (below a… read more here.
Keywords: entering earth; earth atmosphere; space; dust ... See more keywords
Modeling and Experimental Study of Lidar Resolution to Determine Methane Concentration in the Earth’s Atmosphere
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DOI: 10.1134/s0010952520050020
Abstract: This article discusses the resolution of an optical lidar for measuring the background concentration of methane in the Earth’s atmosphere. Using simulation and experimental studies, it has been shown that a resolution the width of… read more here.
Keywords: resolution; methane; concentration; lidar ... See more keywords
Detection of a Space Capsule Entering Earth’s Atmosphere with Distributed Acoustic Sensing (DAS)
Sign Up to like & getrecommendations! Published in 2024 at "Seismological Research Letters"
DOI: 10.1785/0220240394
Abstract: On 24 September 2023, the Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer sample return capsule (SRC) entered Earth’s atmosphere after successfully collecting samples from an asteroid. The known trajectory and timing of this return… read more here.
Keywords: earth atmosphere; sensing das; acoustic sensing; capsule ... See more keywords