Qiniseka ukuthi sizwile ukuthi yini i-permafrost. Ungqimba lomhlaba olufridwe unomphela futhi ubukhulu bayo buba ngamamitha ayi-1.000 XNUMX kwezinye izindawo. Kutholakala ngaphansi komhlaba nje ezindaweni ezise-arctic. Le permafrost yakhiwa izigidi zeminyaka eyedlule lapho inkathi yeqhwa yayiningi.
Manje, Ngaphansi kwethonya labantu kanye nokushisa komhlaba, le permafrost iyancibilika. Ucwaningo lwenziwe ngokuncibilika kwe-permafrost futhi seluphethe ngokuthi lokhu kungafinyelela eqophelweni lokuthi kubangela ukuguquka kwesimo sezulu esibalekile, ngaphandle kwalapho sithola ezinye izindlela zokungenelela.
Inkinga ye-permafrost
I-Permafrost iyancibilika ngenxa yokushisa komhlaba futhi, ngaphandle kwezinkinga ezibangelwa yizinhlobo ezihlala kuyo kanye nayo yonke imvelo ehlobene nayo, inkinga enkulu enayo ngeplanethi, ukuthi iqukethe inani elikhulu lemethane eligciniwe elingakhishelwa emoyeni uma ekugcineni lingancibilika ngokuphelele.
Siyakhumbula ukuthi igesi yemethane igesi yemvelo ekwazi ukugcina ukushisa okuphindwe izikhathi ezingama-25 kune-carbon dioxide (CO2). Njengoba iqhwa liyancibilika, i-methane ihlala ikhishelwa emoyeni futhi, njengoba iyigesi yokushisa okushisa, ikwandisa ngokwengeziwe ukufudumala kwembulunga yonke.
Asikwazi ukumisa le nqubo, noma kunjalo, singazama ukuthatha i-methane njengoba ikhishwa, kwazise imboni yegesi Unobuchwepheshe bokwenza lokhu futhi ujoyine impi yokulwa nokuguquka kwesimo sezulu.
Ngo-2014, ososayensi baphinde baqala ukuthola imigodi exakile ebukeka, okubonakala ukuthi yakha ngenxa yokuqhuma. Kubonakala sengathi ingcindezi engaphakathi kwezindunduma iyakhula kuze kukhishwe ibhamu enkulu ye-methane ngamandla aqhumayo. Lokhu kukhishwa kwegesi yemethane kunemiphumela emhlabeni jikelele, ngoba le gesi igcina futhi inyuse imiphumela yokuguquka kwesimo sezulu.
Yini inkinga ngakho konke lokhu? Ukuthi yize izimboni zegesi zinobuchwepheshe bokumisa lokhu futhi zibambe igesi ye-methane, ngoba ayinakuthengiswa, azitshaleli kuyo. Isixazululo esingaba khona kungaba ukushisa okungenani igesi ukuguqula i-methane ibe yi-CO2 egcina ukushisa okuncane kakhulu. Lokhu kungaba ngcono kwezemvelo kunokuvumela i-methane iphunyuke. Kodwa-ke, wonke lo msebenzi kuzodingeka uxhaswe ngokugcwele ngohulumeni.