Ọdachi ihu igwe buru amụma na Russia

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Ndị sayensị si n’ thelọ Ọrụ Na-ahụ Maka Nchọpụta Mmiri na Tromso, Norway achọpụtala mgbanwe mgbanwe ihu igwe ngwa ngwa ma dị egwu n’Ebe Ugwu Barents. Dị ka ndị ọrụ nyocha si kwuo, mpaghara a na-efunahụ atụmatụ nke oke osimiri Arctic ma ọ nwere ike bụrụ akụkụ nke usoro ihu igwe nke Atlantic n'oge na-adịghị anya. N'aka nke ya, nke a nwere ike inwe mmetụta dị njọ na gburugburu ebe obibi sitere n'okike ebe ụmụ anụmanụ na-adabere na ice bi ma na-azụ azụ azụmaahịa. E bipụtara otu edemede nke ndị sayensị dere na akwụkwọ akụkọ Nature Climate Change.

Oke Osimiri Barents nwere mpaghara abụọ nwere ọchịchị ihu igwe dị iche iche. Ugwu a nwere ihu igwe oyi na gburugburu ebe obibi nke ice, ebe ndịda na-achịkwa ọnọdụ dị nwayọọ Atlantic. Nkewa a mere n'ihi eziokwu ahụ bụ na mmiri ọkụ na nnu dị na Atlantic na-abanye n'otu akụkụ nke oké osimiri, ebe nke ọzọ nwere mmiri dị jụụ na nke dị jụụ nke Arctic, nke kwa afọ n'okpuru nrụgide nke mbụ ahụ na-alaghachi n'ebe ugwu.

Ndị ọkà mmụta sayensị kwenyere na ọrụ bụ isi na usoro a bụ nsogbu nke ọgbụgba mmiri nke mmiri n'ihi mbelata nke mmiri ọhụrụ na-abanye n'oké osimiri n'oge ice na-agbaze. Na oge okirikiri, mgbe ice ice gbazee, oke osimiri na-enweta mmiri ọhụrụ oyi, nke na-emepụta ọnọdụ maka akwa ice ọhụrụ iji mepụta oge oyi ọzọ. Otu ice ahụ na-echebe oyi akwa Arctic site na kọntaktị na ikuku, ma na-akwụ ụgwọ maka mmetụta nke akwa mmiri Atlantic, na-echekwa nsị.

Ọ bụrụ na enweghi mmiri gbazee zuru ezu, a ga-amalite ọgbụgba mmiri, na ikpo ọkụ na nnu nke nnu mmiri niile na-amalite usoro nzaghachi dị mma, nke na-ebelata mkpuchi ice yana, n'ihi ya, na-enye aka na ngbanwe dị ukwuu na nhazi nke oyi akwa, na-eme ka mmiri dị omimi dị elu na elu. Ndị ọkà mmụta sayensị kwuru na ọnụ ọgụgụ zuru oke nke mkpuchi ice na Arctic n'ihi okpomoku zuru ụwa ọnụ dị ka ihe kpatara mbelata nke mmiri gbazee.

Ndị ọrụ nyocha ahụ kwubiri na mmebi nke mmiri gbazee ọhụrụ mere ka e nwee ọtụtụ ihe omume nke mechara duga "ebe dị ọkụ" na Arctic. N'otu oge ahụ, ọ ga-abụrịrị na a gaghị agbanwe agbanwe mgbanwe ndị ahụ, Osimiri Barents n'oge na-adịghị anya ga-abụ akụkụ nke usoro ihu igwe nke Atlantic. Dị mgbanwe ndị a mere naanị n’oge afọ ikpeazụ ice gara aga.

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