<prompt> Fingqa isihloko: Ososayensi baye baxwayisa ngokuthi umhlaba kudingeka uzilungiselele ukwanda ngokushesha kwesivinini sokushintsha kwesimo sezulu. Abacwaningi base - United States bathi ukuqala okusheshayo kokufudumala kwembulunga yonke kulindeleke ukuba kushintshe indlela abantu abaphila ngayo, ngisho nangesikhathi esifushane. Lokhu kuvumelana nobufakazi obusha obukhombisa ukuthi izinga lokushisa elikhuphukayo enyakatho nenkabazwe lingase libe ngu-0,25C eminyakeni eyishumi ngonyaka ka-2020 - izinga elingakaze libonwe okungenani iminyaka engu-1 000. Ubufakazi obusha bubonisa ukuthi izinga lokushisa elikhuphukayo engxenyeni esenyakatho yomhlaba lingase libe ngu-0,25C eminyakeni eyishumi ngonyaka ka-2020 - izinga elingakaze libonwe okungenani iminyaka engu-1.000. I-Arctic ephuzi iyoba nokwanda okukhulu kakhulu, ilandelwe yiNyakatho Melika ensundu, iYurophu emnyama ne-Asia ebomvu Ukuhlaziywa, okusekelwe ekuhlanganiseni kwedatha evela kumamodeli wokulingisa isimo sezulu angaphezu kweshumi nambili avela emhlabeni wonke, kubheke izinga lokushintsha esikhathini eside seminyaka engama-40. Sagxila ezinguqukweni ezenzeka eminyakeni engu-40, okufana nesikhathi sokuphila sezindlu nengqalasizinda eyakhiwe umuntu njengezakhiwo nemigwaqo, kusho usosayensi oholayo uDkt Steve Smith, wasePacific Northwest National Laboratory eWashington. Esikhathini esifushane, kuzodingeka sizivumelanise nalezi zinguquko. Ngokuvamile, umhlaba uya ufudumala ngenxa yokwanda kokukhishwa kwamagesi abamba ukushisa abamba ukushisa kwelanga. Kodwa, ngenxa yokuguquguquka kwesimo sezulu ngokwemvelo ngezikhathi ezimfushane, umphumela ongaba khona wokufudumala kwembulunga yonke ngezikhathi ezifanele kubantu njengobude bempilo yomuntu awuqondakali kahle. Sagxila ezinguqukweni ezenzeka eminyakeni engu-40, okufana nesikhathi sokuphila sezindlu nengqalasizinda eyakhiwe umuntu, kusho usosayensi oholayo uDkt. Steve Smith, wasePacific Northwest National Laboratory eWashington. Igrafu ibonisa izinguquko ezibikezelwe ngaphansi kwezimo ezahlukene zokushintsha kwesimo sezulu. Lolu cwaningo olusha lwaqala ngokubala ukuthi amazinga okushisa ashintsha ngokushesha kangakanani phakathi kuka - 1850 no - 1930, inkathi lapho inani lamagesi avela ezintweni zokubasa ezimbiwa phansi ayeqoqana emkhathini lalilincane. Lokhu kwaqhathaniswa nedatha yokushisa...  <response>: Izinga eNyakatho Nenkabazwe lingase libe ngu-0.25C ngonyaka ngamunye ngo-2020. Lesi sibalo siphindwe kabili uma siqhathaniswa neminyaka engu - 900 eyandulela ikhulu lama - 20. Lesi sixwayiso sakhishwa yiPacific Northwest National Laboratory. Bathi kudingeka siqonde kangcono ukuthi iyini imiphumela yalokhu. 