Masana kimiyya a Cibiyar Bincike Kan Ruwa a Tromsø, Norway, sun gano canjin yanayi cikin sauri da ban mamaki a Tekun Barents na arewacin. A cewar masu bincike, wannan yankin ya rasa fasalin tekun Arctic kuma nan ba da daɗewa ba zai iya zama ɓangare na tsarin yanayi na Atlantic. Hakanan, wannan yana iya haifar da illa ga yanayin halittar cikin gida inda dabbobin da ke dogaro da kankara ke rayuwa da kuma kamun kifin kasuwanci. An buga wata kasida ta masana kimiyya a cikin mujallar Canjin Yanayin Yanayi.
Tekun Barents ya ƙunshi yankuna biyu tare da gwamnatocin yanayi daban-daban. Arewa tana da yanayin yanayi mai sanyi da kuma yanayin halittar da ke da alaƙa da kankara, yayin da kudu ke mamaye da yanayi mara kyau na Atlantic. Wannan rabuwa ya faru ne saboda gaskiyar cewa ruwan dumi da gishiri na Tekun Atlantika ya shiga wani bangare na tekun, yayin da dayan ya kunshi ruwan sanyi da sanyi na Arctic, wanda duk shekara, a matsin lambar tsohon, sai ya koma arewa.
Masana kimiyya sunyi imanin cewa babban rawar da ake takawa a cikin wannan aikin shine taɓarɓarewar ƙarancin ruwa saboda raguwar adadin ruwan sabo da ke shiga teku yayin narkewar kankara. A cikin sake zagayowar al'ada, lokacin da takardar kankara ta narke, saman teku yana samun ruwan sha mai sanyi, wanda ke haifar da yanayi don sabbin zanen kankara su samar da hunturu mai zuwa. Wannan kankara tana kare layin Arctic daga hulɗar kai tsaye tare da yanayi, kuma yana rama tasirin tasirin zurfin zurfin Atlantika, yana kiyaye tatsuniya.
Idan babu wadataccen ruwan narkewa, tofawar zata fara rikicewa, kuma dumama da karuwar gishirin dukkan layin ruwan yana farawa madaidaiciyar madaidaiciyar madaidaiciya wacce zata rage murfin kankara kuma, bisa ga hakan, yana bada gudummawa ga mahimmin canji a cikin rarrabuwar filaye, yana barin zurfin ruwa mai dumi ya tashi sama da sama. Masana kimiyya sun bada misali da raguwar yawan dusar kankara a cikin Arctic saboda dumamar yanayi a matsayin dalilin raguwar kwararar ruwan narkewa.
Masu binciken sun yanke hukuncin cewa karancin sabon narkewar ruwan ya haifar da jerin abubuwa wanda daga karshe ya haifar da samuwar wani "wuri mai zafi" a yankin Arctic. A lokaci guda, canje-canjen wataƙila ba za a iya sauya su ba, kuma Ba Tekun Barents ba da daɗewa ba zai zama wani ɓangare na tsarin yanayi na Atlantic. Irin waɗannan canje-canjen sun faru ne kawai lokacin shekarun kankara na ƙarshe.
