Mufananidzo - Twitter / David App
Zvinhu zviri kuitika muAntarctica izvo, kunyange hazvo zviri zvechisikigo, sezvo shanduko yemamiriro ekunze chinhu chinoshamisa icho vanhu vari kuwedzera nekuda kwenzira yavanobata nayo pasi, zviitiko zvinoitika zvinotinetsa.
Nhau dzichangoburwa ndedze kuwanikwa kwegomba rakakura kubva kumahombekombe eGungwa reWeddell muAntarctica iyo yakashamisa masayendisiti.
Vhura nzvimbo dzemvura dzakadai sedzakawanikwa, dzakakomberedzwa nechando chegungwa, fomu mumatunhu egungwa eAntarctica uye muArctic. Inozivikanwa polynyas inogona kuoneka munzira mbiri: neiyo thermodynamic maitiro, inoitika kana tembiricha yepamusoro pemvura isingasvike panotonhora; pamwe nekuita kwemhepo yekatabatic kana mafungu egungwa, iyo inotakura chando ichi kubva pamuganhu wakatarwa wechando chisingaperi.
Chinhu chisingazivikanwe nezve polynya yakaonekwa kubva kumahombekombe eAntarctica ndeyekuti yakadzika mukapu yepolar. Sekureva kwemasayendisiti, yakaumbwa kuburikidza nemaitiro avasina kana tsananguro. Kungave kuri kuchinja kwemamiriro ekunze here? Zvichiri mangwanani-ngwanani kuti utaure, asi chimwe chezvikonzero chinofungidzirwa kuve kusungika kwechando chegungwa semhedzisiro yemvura inodziya yeAntarctic Ocean.
Mufananidzo - MODIS-Aqua kuburikidza neNASA Worldview
Nguva yekupedzisira chero chinhu chakafanana chaigona kucherechedzwa munzvimbo yeWeddel Sea yaive muma1970, asi pakanga pasina maturusi akakwana ekuidzidza panguva iyoyo. Zvino, nekuda kwema satellite uye marobhoti akanyudzwa mukati megungwa, nyanzvi dzinogona kuzviongorora. Nekudaro, ivo vave kukwanisa kuwana izvo yanhasi polynya inoyera zviuru makumi masere emakiromita, saizi yakati kurei zvishoma kupfuura ndima yePanama.
Kuti uwane rumwe ruzivo, tinokurudzira kushanyira peji reYunivhesiti yeToronto, uko musayendisiti Kent Moore ari, mumwe wevaongorori vechiitiko ichi, achiita tinya apa.