\n\u00cen cel mai recent raport al lor, exper\u0163ii din IPCC (Intergovernmental Panel on Climate Change \/ Grupul interguvernamental de exper\u0163i \u00een evolu\u0163ia climei) noteaz\u0103 faptul c\u0103 temperatura acestor p\u0103m\u00e2nturi, \u00eenghe\u0163ate de zeci de mii de ani, a crescut cu valori cuprinse \u00eentre 0,5 \u015fi 2 grade Celsius \u00eencep\u00e2nd cu sf\u00e2r\u015fitul anilor 1970. Aceast\u0103 cre\u015ftere a fost mai rapid\u0103 dec\u00e2t cre\u015fterea medie a temperaturilor de la suprafa\u0163a Terrei.<\/p>\n
\nPotrivit IPCC, p\u00e2n\u0103 \u00een 2011, permafrostul (denumit \u015fi “pergelisol” potrivit traducerii acestui termen \u00een limba francez\u0103) ar putea pierde p\u00e2n\u0103 la 90% din suprafa\u0163a sa actual\u0103.<\/p>\n
\nOr, dezghe\u0163area sa elibereaz\u0103 o cantitate uria\u015f\u0103 de gaze cu efect de ser\u0103. Se estimeaz\u0103 c\u0103 permafrostul con\u0163ine 1.700 de miliarde de tone de carbon, dep\u0103\u015find de dou\u0103 ori cantitatea de carbon din atmosfer\u0103.<\/strong><\/p>\n \nCu c\u00e2t permafrostul se \u00eenc\u0103lze\u015fte, cu at\u00e2t volumul de carbon eliberat \u00een aer va cre\u015fte, \u00eens\u0103 cuno\u015ftin\u0163ele \u015ftiin\u0163ifice sunt \u00een prezent at\u00e2t de limitate, \u00eenc\u00e2t ONU nu a integrat acest fenomen \u00een modelele sale de previziune.<\/p>\n \nDe\u015fi IPCC consider\u0103 c\u0103, \u00een cadrul celui mai pesimist scenariu \u00een privin\u0163a \u00eenc\u0103lzirii globale, temperatura medie la suprafa\u0163a Globului va cre\u015fte cu 4-5 grade Celsius \u00een anul 2021, cercet\u0103torul francez Florent Domine, un specialist \u00een acest domeniu, care lucreaz\u0103 la Laboratorul arctic Takuvik \u015fi pred\u0103 la Universitatea Laval din Qu\u00e9bec, avertizeaz\u0103 c\u0103 aceast\u0103 cre\u015ftere a temperaturii medii mondiale ar putea fi, de fapt, de 8 grade Celsius.<\/p>\n \nCu c\u00e2t solul se \u00eenc\u0103lze\u015fte, cu at\u00e2t vegeta\u0163ia se dezvolt\u0103 mai mult \u015fi particip\u0103 la accelerarea procesului de dezghe\u0163are \u015fi \u00eenc\u0103lzire a planetei. Degradarea carbonului, care \u00een trecut era \u00eenghe\u0163at, va cre\u015fte, produc\u00e2nd \u015fi mai mult dioxid de carbon \u015fi metan.<\/p>\n \n\u00cenc\u0103lzirea Arcticii genereaz\u0103 \u00een paralel pr\u0103bu\u015firi \u015fi surp\u0103ri ale solului pe mii de hectare, fapt care ridic\u0103 deja probleme majore la nivelul infrastructurilor din emisfera nordic\u0103. Funda\u0163iile caselor \u015fi pistele de aterizare ale inui\u0163ilor canadieni trebuie, de exemplu, s\u0103 fie ranforsate pentru c\u0103 au devenit deja extrem de instabile.<\/p>\n","protected":false},"excerpt":{"rendered":" Subsolul \u00eenghe\u0163at din Antarctica \u015fi din Siberia, cunoscut sub numele de “permafrost”, reprezint\u0103 25% din suprafa\u0163a uscatului din emisfera nordic\u0103, iar \u00eenc\u0103lzirea sa reprezint\u0103, dup\u0103 p\u0103rerea oamenilor de \u015ftiin\u0163\u0103, o veritabil\u0103 “bomb\u0103 climatic\u0103” prea pu\u0163in cunoscut\u0103.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[510],"tags":[16506,14657,39108],"class_list":["post-115837","post","type-post","status-publish","format-standard","hentry","category-actualitate","tag-bomba","tag-clima","tag-permafrost"],"_links":{"self":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts\/115837","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=115837"}],"version-history":[{"count":0,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts\/115837\/revisions"}],"wp:attachment":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=115837"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=115837"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=115837"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}