Tasirin greenhouse na gudu

Sakamakon greenhouse zai faru lokacin da yanayin duniya ya ƙunshi iskar gas a cikin isasshen adadin don toshe radiation na zafi daga barin duniyar, hana duniyar sanyaya da kuma samun ruwa mai ruwa a samansa. Za'a iya bayyana fasalin tasirin greenhouse ta hanyar iyaka a kan radiation na duniya, wanda aka kai shi ta hanyar asymptotically saboda yanayin zafi mafi girma wanda ke fitar da ruwa a cikin yanayi, yana ƙara zurfin gani. Wannan madauki mai kyau yana nufin duniyar ba za ta iya sanyaya ta hanyar radiation na dogon lokaci ba (ta hanyar Dokar Stefan-Boltzmann) kuma tana ci gaba da zafi har sai ta iya haskakawa a waje da bands na sha  na tururi na ruwa.

Sau da yawa ana tsara tasirin greenhouse tare da tururi na ruwa a matsayin nau'in da za a iya kwantar da su. Rashin ruwa ya kai ga stratosphere kuma ya tsere zuwa sararin samaniya ta hanyar tserewa hydrodynamic, wanda ya haifar da duniyar da ta bushe. Wannan mai yiwuwa ya faru ne a farkon tarihin Venus.

Binciken 2012 game da canjin yanayi ya nuna cewa "Duniya a halin yanzu tana shan kusan 240 W m-2 na hasken rana. Karin maida hankali ga carbon dioxide zai sa farfajiyar ta fi zafi tare da wannan fitowar zafi. Biye da wannan ka'idar, ba mu kusa da ƙofar gidan sharar gida ba. Koyaya, ba a fahimci halayyar zafi, yanayin da ke da wadata da ruwa ba, kuma binciken zurfi na waɗannan ya zama dole. "

Koyaya, marubutan sun yi gargadi cewa " fahimtarmu game da ƙarfin, thermodynamics, canja wurin radiative da kimiyyar girgije na yanayin zafi da tururi ba su da ƙarfi," kuma cewa "ba za mu iya kawar da yiwuwar cewa ayyukan ɗan adam na iya haifar da canji ba, idan ba su cika ba, to aƙalla zuwa yanayin yanayi mai zafi fiye da na yanzu" 

Wani sakamako mai kama da Venus ya bayyana kusan babu damar da ayyukan ɗan adam suka haifar da shi. Wani labarin 2013 ya kammala cewa tasirin greenhouse "zai iya haifar da ka'idar ta hanyar karuwar tilasta greenhouse," amma cewa "hasken mutum mai yiwuwa bai isa ba. " Yanayin Venus-kamar Duniya yana buƙatar babban tilasta na dogon lokaci wanda ba zai yiwu ya faru ba har sai rana ta haskaka da wasu daruruwan kashi, wanda zai ɗauki 'yan biliyan shekaru. " Ana sa ran duniya za ta fuskanci tasirin greenhouse "a cikin kimanin shekaru biliyan 2 yayin da hasken rana ke ƙaruwa".Goldblatt, Colin; Watson, Andrew J. (13 September 2012). "The Runaway Greenhouse: implications for future climate change, geoengineering and planetary atmospheres". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 370 (1974): 4197–4216. arXiv:1201.1593. Bibcode:2012RSPTA.370.4197G. doi:10.1098/rsta.2012.0004. PMID 22869797. S2CID 7891446.

 Tarihi 
Duk da yake masanin kimiyya na Caltech Andrew Ingersoll ne ya fara kirkirar kalmar a cikin takarda wanda ya bayyana samfurin yanayin Venus,  George Simpson ne ya buga ra'ayin farko na iyaka a kan radiation na infrared mai fita daga ƙasa a cikin 1927.  Masanin kimiyyar lissafi da ya dace da abin da daga baya za a kira shi tasirin greenhouse, Makoto Komabayashi ne ya bincika shi a Jami'ar Nagoya. Da yake zaton yanayin da ke cike da tururi, Komabayashi da Ingersoll sun lissafa iyakar radiation na infrared wanda ke fitowa wanda ke bayyana yanayin greenhouse. Wannan iyakar yanzu an san ta da Iyakar Komabayashi-Ingersoll, don gane gudummawarsu.Nakajima, Shinichi; Hayashi, Yoshi-Yuki; Abe, Yutaka (1992). "A Study on the "Runaway Greenhouse Effect" with a One-Dimensional Radiative–Convective Equilibrium Model". J. Atmos. Sci. 49 (23): 2256–2266. Bibcode:1992JAtS...49.2256N. doi:10.1175/1520-0469(1992)049<2256:asotge>2.0.co;2.

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