Ka taƙaita labarin:  (CNN) Kodayake yawancin Amurkawa sun yi rawar jiki a wannan hunturu, akwai wata alama mai ban tsoro game da yanayin zafi a arewa. Rufin kankara na teku wanda ke yaduwa a cikin Tekun Arctic a cikin hunturu ya bayyana ya kasance mafi ƙanƙanta a cikin rikodin wannan shekara, a cewar NASA. Ba wai kawai matsakaicin girman wannan shekara ba, wanda aka kai a ranar 25 ga Fabrairu, mafi ƙanƙanta a cikin rikodin tauraron dan adam, har ila yau yana ɗaya daga cikin farkon. Sai dai idan an samu karuwar kankara - mai yiwuwa amma ba zai yiwu ba, a cewar wata sanarwa da NASA ta fitar - wannan ya kafa sabon misali. Binciken ya dogara ne da bayanai daga Cibiyar Bayar da Bayanai na Snow da Ice (NSIDC) da NASA ke tallafawa a Jami'ar Colorado, Boulder. Ruwan kankara na Arctic, ruwan teku mai daskarewa da ke shawagi a saman Tekun Arctic da kuma tekun da ke kusa da shi, yana canjawa a kowane lokaci. Yana ƙaruwa a yankin sa a lokacin hunturu, yawanci yana kaiwa tsakanin ƙarshen Fabrairu da farkon Afrilu, sannan ya ragu a lokacin dumi na bazara da bazara don isa mafi ƙarancinsa a watan Satumba. Idan an kai iyakar wannan shekarar, jimillar mil murabba'in miliyan 5.61, a ranar 25 ga Fabrairu, an kai kwanaki 15 da suka gabata fiye da matsakaicin ranar 1981 zuwa 2010 na Maris 12, a cewar NSIDC. Sau ɗaya ne kawai a baya lokacin ya zo da wuri, a shekara ta 1996. Matsakaicin mil mil miliyan 5.61 kusan mil murabba'in 50,000 ne ƙasa da matsakaicin matsakaicin lokacin hunturu na baya, wanda aka kai a 2011, a cewar NSIDC. Masana kimiyya suna amfani da bayanan tauraron dan adam don bin diddigin canje-canje a cikin kankara ta Arctic, muhimmin mazaunin tsuntsaye da dabbobi masu shayarwa na teku kamar su beyar polar, hatimi da walruses, sama da shekaru talatin. Dangane da Hukumar Kula da Ruwa da Ruwa ta Kasa, Ted Scambos, babban masanin kimiyya na NSIDC, ya sanya yiwuwar rikodin mafi ƙarancin ƙarancin kankara a wannan shekara zuwa ƙaramin kankara a cikin Pacific da raguwar ƙarshen kankara a cikin Tekun Barents. Iskar kudu mai ƙarfi a farkon Maris ma ta taka rawa, a cewar NOAA. Sai kawai yankin Baffin Bay da ruwayen da ke kusa da Newfoundland sun sami kankara fiye da yadda aka saba a wannan lokacin hunturu, in ji shi. Masana kimiyya sun ce...
Masana kimiyya sun ce Arctic teku kankara ya bayyana sun kafa rikodin low iyakar wannan hunturu. Ba tare da yiwuwar karuwa ba a cikin karuwar ruwan teku, mafi girma na 2015 shine 5.61 miliyoyin kilomita.