Ososayensi abavela e-Institute for Marine Research eTromso, eNorway bathole izinguquko ezisheshayo nezishukumisayo zesimo sezulu enyakatho yeBarents Sea. Ngokwabacwaningi, lesi sifunda silahlekelwa yizimpawu zolwandle lwase-Arctic futhi kungekudala singaba yingxenye yesimo sezulu se-Atlantic. Ngokulandelayo, lokhu kungenzeka kube nomthelela omubi ezindaweni zemvelo zendawo lapho kuhlala khona izilwane ezincike eqhweni kanye nokudoba okuthengiswayo. Indatshana yososayensi yashicilelwa kumagazini i-Nature Climate Change.
ULwandle iBarents lunezifunda ezimbili ezinemibuso ehlukene yesimo sezulu. Inyakatho inesimo sezulu esibandayo nezinhlelo zezinto eziphilayo ezihlobene neqhwa, kuyilapho iningizimu ibuswa izimo ze-Atlantic eziphansi. Lokhu kwehlukaniswa kungenxa yokuthi amanzi afudumele futhi anosawoti e-Atlantic angena engxenyeni eyodwa yolwandle, kanti enye iqukethe amanzi aqabulayo futhi abandayo e-Arctic, okuthi minyaka yonke ngaphansi kwengcindezi yangaphambilini yehle iye enyakatho.
Ososayensi bakholelwa ukuthi indima enkulu kule nqubo idlalwa ukwephulwa kokuhlukaniswa kwezendlalelo zamanzi ngenxa yokwehla kwenani lamanzi ahlanzekile angena olwandle ngesikhathi sokuncibilika kweqhwa. Emjikelezweni ojwayelekile, lapho iqhwa liyancibilika, indawo yolwandle ithola amanzi abandayo abandayo, okwenza kube nemibandela yokuthi ama-ice sheet amasha akhe ubusika obuzayo. Iqhwa elifanayo livikela ungqimba lwe-Arctic ekuthintaneni ngqo nomoya osemkhathini, futhi libuye linxephezele ithonya lezingqimba ezijulile ze-Atlantic, lilondoloze i-stratification.
Uma engekho amanzi anele ancibilikayo, ukuhlanjululwa kuqala ukuphazanyiswa, futhi ukufudumala nokukhuphuka kasawoti kuyo yonke ikholamu lamanzi kuqala i-loop yokuphendula enhle enciphisa ukumbozwa kweqhwa futhi, ngokufanele, kube nomthelela ekushintsheni okukhulu kakhulu kukwehlukaniswa kwezendlalelo, okuvumela amanzi afudumele ajulile ukuthi akhuphukele phezulu nangaphezulu. Ososayensi bathi ukwehla okujwayelekile kwenani leqhwa e-Arctic ngenxa yokushisa komhlaba njengesizathu sokwehla kokugeleza kwamanzi ancibilikile.
Abaphenyi baphetha ngokuthi ukuncipha kwamanzi ahlanzekile ancibilikile kwaqubula uchungechunge lwezehlakalo ezagcina ziholele ekutheni kuvele "indawo eshisayo" e-Arctic. Ngasikhathi sinye, lezi zinguquko kungenzeka zingalungiseki, kanti noLwandle iBarents kungekudala luzoba yingxenye yohlelo lwesimo sezulu sase-Atlantic. Ukuguqulwa okunjalo kwenzeka kuphela ngenkathi yokugcina yeqhwa.
