Sawir - Muuqaal shaashad ah
Barafka Arctic ayaa dhalaalayawaxayna ku sameysaa si xawli ah oo ay ku baaba'do gebi ahaanba dhawr iyo toban sano oo dheeraad ah. Waana taas, inta meeraha kululaanaya, lakabka barafoobay ee dul sabbaynaya badweynta Arctic iyo badaha ku xeerani sii jiri karin.
Illaa iyo hadda waxaan ogaanay barafka yar-yar, yacni, barafka jira dhawr sano oo keliya, wuxuu si fudud ugu dhalaalaa xagaaga kulul. Laakiin nasiib daro, sidoo kale "barafkii hore" ayaa baaba'aya.
Qiyaasaha barafka badda ee Arctic ayaan dhammeystirnayn, sidaa darteed cilmi-baarayaasha NASA waxay adeegsadeen hab ay soo saartay Jaamacadda Colorado (Mareykanka) oo u oggolaanaysa iyaga inay ka yeeshaan ama ka yaraadaan fikrad cad oo ah sida lakabku isu beddelay. baraf ah laga soo bilaabo 1984 ilaa hadda, ilaa cabiri karaa heerkulka, cusbada, cufnaanta iyo daboolka barafka kaas oo ku dul fadhiisanaya barafka mahadnaqa qalabka microwave-ka ee dulsaaran.
Sidaa darteed, waxay abuureen animation muujinaya sida barafku u korayey una qandaraasyey 32 sano ee la soo dhaafay.
Weligeed baraf isku mid ahi ma jiro. Sannad kasta, wuu kordhaa xilliga jiilaalka wuuna yaraadaa xagaaga. Tani waa caadi. Barafka sii noolaada xilliga jiilaalka ayaa sii dhumuc weynaada sida waqtigu u dhaco, wuxuuna kori karaa inta u dhexeysa 1 illaa 3 mitir sannadaha ugu horreeya, iyo inta u dhexeysa 3 illaa 4 mitir markay yihiin "baraf duug ah". Kuwan dambe ayaa, sidaa awgeed, u adkaysi badan saamaynta hirarka ama duufaanta; Si kastaba ha noqotee, waxba ka ilaalin maayo heerkulka sii kordhaya.
Walt Meier, oo ah cilmi baare ka tirsan NASA xaruntiisa Goddard ee Maryland ayaa yiri inta badan barafkii hore wuu lumay, oo intaa ku daray:
Sannadkii 1980 lakabyo sannado badan ah ayaa ka samaysmay in ka badan 20% daboolka barafka. Maanta kaliya waxay gaarayaan 3%.
Haddii isbeddelku uusan isbeddelin, Arctic waxay u badan tahay inay yeelato xagaa bilaa baraf ah dhowaan.