Pfupisa nyaya yacho:  Methane, chinhu chikuru chinoumba gasi rechisikigo, inowanzokonzerwa nokuora kwezvinhu zvinogadzirwa nemiti. Asi kune rumwe rudzi rwegasi rinouraya, runonzi abiotic methane, runogadzirwa nemakemikari anoitika muguruva riri pasi pegungwa. Zvino masayendisiti akawana mvura yakadzika ine gasi rakawanda muArctic iyo inochengeterwa methane isina upenyu - gasi rinobudirira kakapetwa ka20 mukuchengeta kupisa kupfuura carbon dioxide. Gasi racho rinoumbwa nomutoo unonzi serpentinisation. Serpentinisation inoitika apo mvura yomugungwa inopindirana nematombo anopisa emantle akacherwa pamwe chete nezvikanganiso zvikuru mukati megungwa repasi. Matangi acho akachengeteka, uye masayendisiti haafungi kuti achakanganisa kuchinja kwemamiriro okunze. Panzvimbo pezvo, ivo vanoti masangano akafanana rimwe zuva angashandiswa kuchengeta methane, iyo inogona kushandiswa gare gare sechinhu chinopisa. Rimwe dziva rakanga richangobva kuwanwa pachikomo cheKnipovich chinokurumidza kupararira, muFram Strait yakadzika yeArctic Ocean. 'Kupararira kunononoka kwazvo kwechikomo ichi kunoratidza kuti nharaunda yeArctic yakanaka nokuda kworudzi urwu rwekugadzirwa kwemethane,' akadaro Joel Johnson purofesa anobatsira paUniversity of New Hampshire. The Center for Arctic Gas Hydrate, Climate and Environment (Cage) inofungidzira kuti magigatononi anosvika 15 000 ekabhoni angave akachengetwa muchimiro chehydrates pasi pegungwa. Masayendisiti akawana mvura huru yakadzika ine gasi hydrates muArctic iyo inochengeterwa abiotic methane - gasi iro rinobudirira kakapetwa ka20 mukubata kupisa kupfuura carbon dioxide. Imwe nzvimbo yakadaro ichangobva kuwanwa paultrallow kupararira Knipovich ridge (inoratidzwa mumufananidzo), muFram Strait yakadzika yeArctic Ocean. 'Asi fungidziro iyi haisati ichirangarira methane isina upenyu. Saka zvichida pane zvimwe zvakawanda,' akadaro Jürgen Mienert, mutungamiriri weCage. Methane ndiyo gasi rechipiri rinonyanya kukonzera kuchinja kwemamiriro okunze. Gasi racho rine simba rakapetwa ka23 kupfuura carbon dioxide mukubata kupisa uye pari zvino riri kunangidzirwa nehurumende mukuedza kuderedza kudziya kwepasi rose. Kushatiswa kwemetane kwakaderera ne11 muzana kubvira muna 1990 kunyange zvazvo...
Mvura yakawanda iri muArctic inochengeterwa methane isina upenyu. Methane inoshanda zvakapetwa ka20 pakuchengetedza kupisa kupfuura carbon dioxide. Midziyo iyi yakachengeteka sezvo methane yakabatwa mumarara. Asi kune imwe nzvimbo masayendisiti akawana methane iri kubuda pasi peArctic.