Intaba yomkhenkce ephindwe kabini ubukhulu beManhattan yahlukana neGreenland enkulu iPetermann Glacier, enokukhawuleza imatshi yomkhenkce ukuya emanzini angasentla, izazinzulu zathi ngoLwesithathu.
Esi sisihlandlo sesibini kwisithuba esingaphantsi kweminyaka emibini apho iPetermann Glacier ivelisa isiqithi somkhenkce esoyikekayo. Ngowama-2010, yakhupha elinye iqhekezana lomkhenkce elwandle.
Ikhefu lamva nje labonwa yi-NASA ye-Aqua satellite, edlula kwi-North Pole amaxesha amaninzi ngosuku, kwaye yaphawulwa nguTrudy Wohlleben weNkonzo ye-Ice yaseCanada.
“Ngeli xesha lonyaka, sihlala sijonge iPetermann Glacier,” utshilo uWohlleben, kuba inokuvelisa iintaba zomkhenkce ezinkulu ezihlasela iindledlana zeenqanawa zoMntla weAtlantiki okanye amaqonga e-oyile e-imperil eGrand Banks kude neNewfoundland. Iqhekeza elikhulu le-iceberg lika-2010 lenze loo nto, kodwa akukho monakalo, watsho ngomnxeba.
Imifanekiso ye-NASA ibonise ukuzala komkhenkce-ukugqabhuka kumlambo odadayo womkhenkce obizwa ngokuba lulwimi lomkhenkce, inxalenye ye-Petermann Glacier enqatyisiweyo yomhlaba-kwaye ihamba ezantsi ecaleni kwefjord kunxweme olukumantla-ntshona eGreenland. Ngo-2001 kwafunyaniswa ukuba kukho ukuqhekeka komkhenkce, kodwa ngoMvulo kwabonakala ukuqhekeka.
NgoLwesibini, isathelayithi yabona umsantsa omkhulu phakathi komkhenkce kunye nomkhenkce, kwaye amaqhekeza omkhenkce aye aqhekeka, utshilo iNASA kwi-Intanethi.
"Ulwandiso oludadayo [lomkhenkce] luyaqhekeka," utshilo u-Eric Rignot weJet Propulsion Laboratory yeNASA kwingxelo. Ayikokuwa, kodwa ngokuqinisekileyo sisiganeko esibalulekileyo.
Omnye umahluko phakathi kwesiganeko sika-2010 kunye nesi sesokuba isiqithi somkhenkce sangoku saphuka phezulu, apho umkhenkce wawuphezu kweendonga ezisemacaleni ze-fjord, ngokufanelekileyo ukuphazamisa ukuhamba kolwandle lomkhenkce.
“Esi siqwenga sibuyele umva kakhulu, sisenokuba besibonelela ngamandla amakhulu okukhubekisa [umkhenkce] ngaphezu kweqhekeza elaqhekeka ngo-2010, elithe laphumela ngaphandle,” utshilo u-Andreas Muenchow, ingcali yolwandle eArctic. kwiDyunivesithi yaseDelaware.
Ikhefu lika-2010 likhawulezise ukuhamba kukaPetermann Glacier ukuya elwandle ngeepesenti ezili-10 ukuya kuma-20 ekhulwini, utshilo uMenchow ngomnxeba. Ikhefu langoku linokuba nempembelelo enkulu kwintshukumo yomkhenkce.
Imikhenkce engaselunxwemeni efana nolu lwimi lomkhenkce oludadayo idla ngokuvala umkhenkce osingise elwandle. Xa amaqhekeza omkhenkce egqabhuka, imikhenkce esekwe emhlabeni emva kwawo ihlala ihamba ngokukhawuleza, utshilo uMenchow.
Ukuhamba kwalo mkhenkce kumanzi avulekileyo akusayi kuba nempembelelo ekhawulezileyo kumanqanaba olwandle, kuba lo mkhenkce wawusele uyinxalenye yeshelufu yomkhenkce eyayincanyathiselwe emhlabeni kodwa yandiswa phezu kwamanzi, kanye njengetyhubhu lomkhenkce elinyibilikayo kwiglasi yolwandle. amanzi akalinyusi izinga lamanzi eglasini.
U-Muenchow uthe utshintsho lwemozulu luyimbangela kwimeko yangoku ye-Petermann Glacier. Uthe lo mkhenkce usemva kakhulu emhlabeni njengoko ubunjalo ukusukela oko kwaqala iRevolution Revolution ngaphezulu kweminyaka eli-150 eyadlulayo.
E-WASHINGTON-Reuters
