lotnictwo: Methane

Evidence: 100 • authority: 72

Methane (US: METH-ayn, UK: MEE-thayn) is a chemical compound that has the chemical formula CH4 (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride, the simplest alkane, and the main constituent of natural gas. The abundance of methane on Earth makes it an economically attractive fuel, although capturing and storing it is difficult because it is a gas at standard temperature and pressure. In the Earth's atmosphere methane is transparent to visible light but absorbs infrared radiation, acting as a greenhouse gas. Methane is an organic hydrocarbon, and among the simplest of organic compounds. Naturally occurring methane is found both below ground and under the seafloor an…

Evidence: 65 • authority: 72

Methane clathrate (CH4·5.75H2O) or (4CH4·23H2O), also called methane hydrate, hydromethane, methane ice, fire ice, natural gas hydrate, or gas hydrate, is a solid clathrate compound (more specifically, a clathrate hydrate) in which a large amount of methane is trapped within a crystal structure of water, forming a solid similar to ice. Originally thought to occur only in the outer regions of the Solar System, where temperatures are low and water ice is common, significant deposits of methane clathrate have been found under sediments on the ocean floors of the Earth (around 1100 m below the sea surface). Methane hydrate is formed when hydrogen-bonded water and methane gas come into contact a…

Evidence: 53 • authority: 72

Aquatic methane is defined as biogenic methane (CH4) formed in water as a product of microbial activity during the decomposition of organic material under anaerobic conditions. To a lesser but important extent, aquatic methane is also a product of under water geological processes. Aquatic methane is produced, stored, and emitted within aquatic environments such as lakes and ponds, rivers, wetlands, reservoirs, and oceans. It is a major component of the global methane cycle and plays a significant role in climate change, ecosystem dynamics, and biogeochemical processes. Aquatic methane is a byproduct of methanogenesis, a form of anaerobic respiration where microbes called methanogens break d…

Evidence: — • authority: 80

Near seafloor methane flux in the world's largest human-induced dead zone is regulated by sediment accumulation rate