Akwai karatuna da yawa wadanda suke kokarin gano tasiri da sakamakon da narkewar ke haifarwa kan yanayi da kwanciyar hankalin duniyar tamu. Godiya ga tauraron dan adam zamu iya sanin motsi da banbancin girman gilasai. Kwanan nan, dutsen kankara mafi girma da aka taɓa gani a tarihi an “haifeshi” bayan ɓacewa daga yankin Antarctic.
Yanke katangar Larsen C a cikin Antarctica ya ba masana kimiyya dama don ƙarin koyo game da kwanciyar hankali na dandamali. Shin narkewar na haifar da rashin zaman lafiya?
Girman dutsen kankara da aka saki a Antarctica ya ninka na Luxembourg ninki biyu. Tun daga wannan lokacin, wannan babbar dusar kankara ta tubular, mai suna A68, tana ta motsawa kusan kilomita 5 daga shingen. Hotunan da tauraron dan adam ya bayar sun nuna samuwar gungun kusan kananan kankara 11.
Yanzu a Antarctica lokacin sanyi ne kuma da kyar da haske. Awannin yini ba su da yawa, don haka don nazarin canjin kankara ta A68, dole ne a yi amfani da tauraron dan adam na hangen nesa.
Ana yin ƙoƙari don gano ko rukunin Larsen C na haifar da rashin kwanciyar hankali a cikin sauran sassan Antarctic. Kazalika Yana da mahimmanci fahimtar daidaiton dusar kankara ta A68 yayin da yake raguwa da gantali.
“Idan shiryayyen kankara ya rasa lamba tare da dagawa, ko dai daga ci gaba da sirara ko calving, zai iya haifar da wani gagarumin hanzari a cikin saurin kankara da kuma yiwuwar kara tabarbarewa. Da alama labarin Larsen C na iya karewa har yanzu ”, in ji Dokta Hogg a cikin binciken da aka buga a mujallar Yanayin Canjin Yanayi.
Narkar da kan dusar kankara da kyar zai haifar da wani babban tashin hankali a matakin teku tunda karfin maye gurbin ruwan dusar kankara da ruwa.