We have constructed a record of atmospheric methane (CH 4) over the last 10,000 γ which shows that CH 4 has increased to more than double the natural levels of a century ago. This record is based on systematic global measurements taken since 1975, the occasional measurements taken by ...
These loops could be positive, as would be the case should carbon sinks become saturated or if melting permafrost lead to the emission of large quantities of methane. The loops could also be negative, as in the case of higher carbon concentrations leading to more rapid natural growth of ...
Abbreviations: pMMO—particulate methane monooxygenase, MDH—methanol dehydrogenase (Mox) and (XoxF), Hhy— [NiFe] hydrogenase, CODH—carbon monoxide dehydrogenase, Fae—formaldehyde activating enzyme, MtdB—NAD(P)-dependent methylene-tetrahydromethanopterin dehydrogenase, Mch—methenyl-tetrahydromethanopte...
Atmospheric methane growth reached an exceptionally high rate of 15.1 ± 0.4 parts per billion per year in 2020 despite a probable decrease in anthropogenic methane emissions during COVID-19 lockdowns1. Here we quantify changes in methane sources and in its atmospheric sink in 2020 compared...
Large variations in the growth of atmospheric methane, a prominent greenhouse gas, are driven by a diverse range of anthropogenic and natural emissions and by loss from oxidation by the hydroxyl radical. We used a decade-long dataset (2010–2019) of sate
Impacts of high atmospheric greenhouse gas levels The rapidly rising concentrations of greenhouse gases (GHGs) are worrying news for the planet, as they contribute to the climate crisis. GHGs like CO₂, methane, and nitrous oxide trap heat radiating from the planet’s surface, preventing it fro...
(in yrs CE) to obtain the age of the air at each of our sample depths. We have assumed that Δage has remained constant throughout the record which is supported by the strong correlation between the Law Dome and WDC05A methane records. The estimated uncertainty of this timescale is ±10...
That can be explained by the rather long formaldehyde lifetime in such a medium and the very stable distribution of methane. Nevertheless it has been generaly observed slightly higher daily at 5m than at 47m high and the opposite for night-time levels....
Atmospheric gas refers to the gases present in the Earth's atmosphere, such as nitrogen, oxygen, carbon dioxide, methane, and ozone, which have the capacity to absorb heat and contribute to the greenhouse effect. AI generated definition based on:Climate Change and Soil Interactions,2020 ...
Agriculture (e.g., rice paddies) has been considered one of the main emission sources responsible for the sudden rise of atmospheric methane concentration (XCH4) since 2007, but remains debated. Here we use satellite-based rice paddy and XCH4 data to inv