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- Arctic_methane_release abstract "Arctic methane release is the release of methane from seas and soils in permafrost regions of the Arctic. While a long-term natural process, it may be exacerbated by global warming. This results in a positive feedback effect, as methane is itself a powerful greenhouse gas. The feedback of the undisturbed process is comparably weak, however, because the local release leads to a warming spread over the whole globe.The Arctic region is one of the many natural sources of the greenhouse gas methane. Global warming accelerates its release, due to both release of methane from existing stores, and from methanogenesis in rotting biomass. Large quantities of methane are stored in the Arctic in natural gas deposits, permafrost, and as submarine clathrates. Permafrost and clathrates degrade on warming, thus large releases of methane from these sources may arise as a result of global warming. Other sources of methane include submarine taliks, river transport, ice complex retreat, submarine permafrost and decaying gas hydrate deposits.During interglacials, average atmospheric methane concentrations are nearly twice the lowest values in the depths of glacial. Concentrations in the Arctic atmosphere are higher by 8–10% than that in the Antarctic atmosphere. During cold glacier epochs, this gradient decreases to practically insignificant levels. Land ecosystems are considered the main sources of this asymmetry, although it has been suggested that "the role of the Arctic Ocean is significantly underestimated." Soil temperature and moisture levels have been found to be significant variables in soil methane fluxes in tundra environments.According to an article in the magazine Science, while methane release is indeed likely to amplify global warming to an unknown level, fears that it could lead to catastrophe are possibly overblown.".
- Arctic_methane_release thumbnail Methanestorflaket.JPG?width=300.
- Arctic_methane_release wikiPageExternalLink lasthours.org.
- Arctic_methane_release wikiPageExternalLink www.ameg.me.
- Arctic_methane_release wikiPageExternalLink methane-hydrates-and-global-warming.
- Arctic_methane_release wikiPageID "19480112".
- Arctic_methane_release wikiPageRevisionID "606416526".
- Arctic_methane_release caption "The Permian–Triassic extinction event may have been caused by release of methane from clathrates. 96% of marine species were wiped out.".
- Arctic_methane_release float "right".
- Arctic_methane_release hasPhotoCollection Arctic_methane_release.
- Arctic_methane_release subject Category:Arctic_Ocean.
- Arctic_methane_release subject Category:Climate_feedbacks.
- Arctic_methane_release subject Category:Effects_of_global_warming.
- Arctic_methane_release subject Category:Environment_of_the_Arctic.
- Arctic_methane_release subject Category:Methane.
- Arctic_methane_release subject Category:Permafrost.
- Arctic_methane_release type ClimateFeedbacks.
- Arctic_methane_release type Consequence111410625.
- Arctic_methane_release type EffectsOfGlobalWarming.
- Arctic_methane_release type Feedback113479380.
- Arctic_methane_release type NaturalProcess113518963.
- Arctic_methane_release type Phenomenon100034213.
- Arctic_methane_release type PhysicalEntity100001930.
- Arctic_methane_release type Process100029677.
- Arctic_methane_release comment "Arctic methane release is the release of methane from seas and soils in permafrost regions of the Arctic. While a long-term natural process, it may be exacerbated by global warming. This results in a positive feedback effect, as methane is itself a powerful greenhouse gas.".
- Arctic_methane_release label "Arctic methane release".
- Arctic_methane_release label "Relargage du méthane de l'Arctique".
- Arctic_methane_release label "Rilascio del metano artico".
- Arctic_methane_release label "北極甲烷釋出".
- Arctic_methane_release sameAs Relargage_du_méthane_de_l'Arctique.
- Arctic_methane_release sameAs Rilascio_del_metano_artico.
- Arctic_methane_release sameAs m.04n1pnq.
- Arctic_methane_release sameAs Q2423121.
- Arctic_methane_release sameAs Q2423121.
- Arctic_methane_release sameAs Arctic_methane_release.
- Arctic_methane_release wasDerivedFrom Arctic_methane_release?oldid=606416526.
- Arctic_methane_release depiction Methanestorflaket.JPG.
- Arctic_methane_release isPrimaryTopicOf Arctic_methane_release.