Baraf baraf ah oo laba jeer ka weyn baaxadda Manhattan ayaa ka go'ay Greenland aadka u weyn ee Petermann Glacier, kaas oo soo dedejin kara socodka barafka ee biyaha waqooyiga, saynisyahannadu waxay sheegeen Arbacadii.
Tani waa markii labaad in ka yar laba sano oo glacier Petermann uu dhaliyo jasiirad baraf ah oo aad u xun. Sannadkii 2010, waxay soo saartay baraf kale oo weyn oo badda galay.
Nasashadii ugu dambeysay waxaa arkay dayax gacmeedka NASA ee Aqua, kaas oo mara waqooyiga cirifka dhowr jeer maalintii, waxaana xustay Trudy Wohlleben oo ka tirsan Adeegga Barafka ee Kanada.
"Waqtigan oo kale sanadka, waxaan had iyo jeer daawaneynaa Petermann Glacier," ayuu yiri Wohlleben, sababtoo ah waxay dhalin kartaa baraf weyn oo ku soo duulaya marinka maraakiibta Waqooyiga Atlantic ama goobaha saliidda ee Grand Banks ee Newfoundland. Qayb weyn oo ka mid ah barafkii 2010 ayaa sidaas sameeyay, laakiin wax khasaare ah ma gaysan, ayay ku tidhi telefoon.
Sawirada NASA ayaa muujiyay dhalmada barafka - oo ka soo go'ay webi sabbeynaya oo baraf ah oo loo yaqaan carrab baraf, qayb ka mid ah dhulka Petermann Glacier - oo u sii qulqulaya qulqulka hoose ee fjord ee xeebta waqooyi-galbeed ee Greenland. Khilaaf baraf ah ayaa la ogaaday sannadkii 2001-dii, laakiin Isniintii ayaa dillaacay.
Talaadadii, dayax gacmeedku waxa uu basaasay farqi weyn oo u dhexeeya barafka iyo barafka, iyo qaybo ka sii hooseeya ee barafka ayaa jabay, NASA ayaa sheegtay.
"Balaadhinta sabaynaysa [barafka barafka] way kala go'aysaa," Eric Rignot oo ka tirsan shaybaadhka Jet Propulsion Laboratory ee NASA ayaa ku yidhi hadal uu soo saaray. "Ma ahan burbur, laakiin dhab ahaantii waa dhacdo muhiim ah."
Mid ka mid ah farqiga u dhexeeya dhacdadii 2010 iyo kan ayaa ah in jasiiradda barafka ee hadda jirta ay ka go'day kor u sii socoshada, halkaas oo barafku uu ku qumman yahay gidaarada fjord ee dhagaxa ah, si wax ku ool ah u xannibaya dhaqdhaqaaqa glacier ee badda.
Andreas Muenchow, oo ah khabiir ku takhasusay badweynta Arctic, ayaa yidhi: "Qaybtan oo dib u soo noqotay, waxa laga yaabaa inay bixinaysay xoog badan oo is khilaafsan si ay u gufto [glacier] marka loo eego gabalkii jabay 2010, taas oo aad uga sii fogayd," ee Jaamacadda Delaware.
Nasashada 2010-kii ayaa dardar galisay dhaqdhaqaaqa Petermann Glacier ee dhanka badda 10 boqolkiiba ilaa 20 boqolkiiba, Muenchow ayaa ku sheegay taleefan. Nasashada hadda waxay saameyn weyn ku yeelan kartaa dhaqdhaqaaqa barafka.
Barafka xeebaha ee sida carrabkan sabbaynaya barafka ayaa u janjeera inuu xannibo qulqulka barafka ee u socda badda. Marka jajabyada barafku dillaacaan, barafka ku salaysan dhulka ee ka dambeeya inta badan si dhakhso ah ayey u socdaan, ayuu yidhi Muenchow.
Dhaqdhaqaaqa tiradan badan ee barafku galayo biyaha furan wax saamayn ah isla markiiba kuma yeelanayso heerarka badda, maadaama barafkani uu hore uga mid ahaa barafka barafka ee ku dheggan dhulka laakiin ku fidsan biyaha, sida baraf dhalaalaysa ee galaas biyuhu kor uma qaadaan heerka biyaha galaaska.
Muenchow waxa uu sheegay in isbeddelka cimiladu ay qayb ka ahayd xaaladda hadda jirta ee glacier Petermann. Waxa uu sheegay in barafkan uu dhulka dib ugu soo laabanayo sidii uu ahaa tan iyo bilowgii Kacaankii Warshadaha in ka badan 150 sano ka hor.
WASHINGTON – Reuters
