Yankunan polar, wadanda dusar kankara ta lullubesu, sune suka fi fuskantar matsalar dumamar yanayi. Dukkanin Arctic da Antarctica suna fuskantar manyan canje-canje. A takamaiman batun Antarctica, yankuna marasa kankara zasu fadada kuma zasu gama haduwa yayin da kankara ke narkewa.
A cewar wani sabon binciken da aka yi daga Asibitin Antarctic na Australia (AAD), wanda aka buga shi a cikin mujallar Nature, a ƙarshen karni a cikin farin aljanna za'a iya samun kusan ƙanƙara 25%; wato zai sami kusan kilomita murabba'in kilomita 17.267.
Ga waɗanda suke son yin tafiya zuwa Antarctica a nan gaba, tabbas zai zama da sauƙi fiye da yanzu. Amma, menene sakamakon wannan narkewar zai iya samu? Da kyau, mafi bayyane wanda duk mun sani shine tashin teku. Duk wannan dusar kankarar dole ta tafi wani wuri, kuma a bayyane take zuwa teku.
Zuwa ƙarshen karnin, duniyar Duniya za ta bambanta sosai, kamar yadda tekun ta ke za su yi girma 30 mita, kuma har tsawon shekaru 10.000 daga yanzu, lokacin da babu dusar ƙanƙara a Antarctica, wannan haɓaka zai zama mita 60 kamar yadda aka bayyana wa Kamfanin Sinc mai bincike a Carnegie Institution fos Science (Amurka) Ken Caldeira.
Baya ga mummunan sakamakon da zai haifar wa sauran duniyar, a Antarctica duka 'yan asalin ƙasar da masu cin zalin za su yaɗu. Kamar yadda koyaushe ke faruwa a yanayi, za a yi gwagwarmaya don rayuwa, kuma a bayyane yake mafi kyawun dacewa zai ci nasara. Wannan yana nufin cewa wasu daga cikin 'yan asalin kasar na iya bacewa.
A halin yanzu yankuna da ba su da kankara, waɗanda suka fara daga kilomita kilomita murabba'i zuwa dubu da yawa, suna wuraren kiwo don hatimai da tsuntsayen teku, amma kuma suna gida ne ga ƙwararrun masu juji, fungi da lichens. Bayan lokaci, za su iya mallakar duk nahiyar mulkin mallaka, abin da ke ba mu mamaki ko zai sake zama koren. kamar yadda yake shekaru miliyan 50 da suka gabata.