\nCu doar c\u00e2teva luni \u00eenainte de \u00eent\u00e2lnirea marilor lideri politici ai lumii care vor participa la un summit despre evolu\u0163ia climei, la Paris, la sf\u00e2r\u015fitul anului 2015, Agen\u0163ia american\u0103 de observ\u0103ri oceanice \u015fi atmosferice (National Oceanic and Atmospheric Administration\/ NOAA) a dat publicit\u0103\u0163ii o cifr\u0103 \u00eengrijor\u0103toare, de\u015fi previzibil\u0103. Concentra\u0163ia lunar\u0103 de CO2 din atmosfer\u0103 a dep\u0103\u015fit \u00een martie 2015, pentru prima dat\u0103 \u00een epoca postindustrial\u0103, concentra\u0163ia de 400 p\u0103r\u0163i per milion (ppm) la nivel global.<\/p>\n
\nO astfel de cifr\u0103 a fost deja m\u0103surat\u0103 de acela\u015fi centru de cercet\u0103ri \u015ftiin\u0163ifice \u00een urm\u0103 cu doi ani, \u00eens\u0103 era vorba de o valoare punctual\u0103 \u015fi local\u0103, detectat\u0103 \u00een Hawaii, pe 9 mai 2013. Noua m\u0103sur\u0103toare corespunde \u00eens\u0103 unei medii lunare mondiale (400,83 ppm – \u00een martie 2015).<\/strong><\/p>\n \n\u00cen februarie 2015, comunitatea interna\u0163ional\u0103 s-a lini\u015ftit \u00eentr-o anumit\u0103 m\u0103sur\u0103, afl\u00e2nd c\u0103 emisiile de CO2 au stagnat \u00een 2014, fapt care nu se mai \u00eent\u00e2mplase \u00een ultimii 40 de ani, cu excep\u0163ia perioadelor de recesiune economic\u0103. Cu toate acestea, informa\u0163ia anun\u0163at\u0103 luni de NOAA nu este deloc anecdotic\u0103.<\/p>\n \nCifra anun\u0163at\u0103 nu reprezint\u0103 niciun maxim, nici un recul, explic\u0103 jurnali\u015ftii de la Slate.com, ci reflect\u0103 o curs\u0103 accelerat\u0103 a fenomenului de \u00eenc\u0103lzire global\u0103. \u00cen Hawaii, de exemplu, tendin\u0163a este persistent\u0103: 401,29 ppm \u00een aprilie 2014 \u015fi 403,26 ppm \u00een aprilie 2015. “Acest fapt nu \u00eenseamn\u0103 c\u0103 vom putea s\u0103 plant\u0103m ananas \u00een Canada”, au declarat, cu ironie, jurnali\u015ftii americani. Ei spun c\u0103 dereglarea climei este un fenomen \u00een plin\u0103 derulare, care va fi mult prea rapid pentru ca anumite plante \u015fi anumite specii de animale s\u0103 poat\u0103 s\u0103 evolueze \u015fi s\u0103 se adapteze la noile habitate.<\/p>\n \nP\u00e2n\u0103 la revolu\u0163ia industrial\u0103, concentra\u0163ia de CO2 din atmosfera terestr\u0103 nu a dep\u0103\u015fit valoarea de 300 ppm \u00eentr-un interval de timp de cel pu\u0163in 800.000 de ani.<\/strong><\/p>\n \nConferin\u0163a Organiza\u0163iei Na\u0163iunilor Unite despre modificarea climei va avea loc \u00een luna decembrie la Paris \u015fi are obiectivul de a implementa o serie de reglement\u0103ri cu scopul de a limita \u00eenc\u0103lzirea climei la cel mult 2\u00b0C \u00een raport cu epoca pre-industrial\u0103. Rezultatele summiturilor precedente sunt \u00eens\u0103 pu\u0163in \u00eencurajatoare \u00een privin\u0163a rezolu\u0163iilor care vor fi adoptate \u00een capitala Fran\u0163ei la acea conferin\u0163\u0103 mondial\u0103.<\/p>\n","protected":false},"excerpt":{"rendered":" Concentra\u0163ia de CO2 din atmosfera terestr\u0103 a dep\u0103\u015fit, pentru prima dat\u0103 \u00een epoca postindustrial\u0103, \u00een martie 2015, valoarea medie lunar\u0103 de 400 p\u0103r\u0163i per milion (ppm), confirm\u00e2nd previziunile speciali\u015ftilor \u00een privin\u0163a deregl\u0103rii climei \u015fi a amenin\u0163\u0103rilor la adresa biodiversit\u0103\u0163ii, potrivit slate.fr.<\/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":[13358,40469],"class_list":["post-121743","post","type-post","status-publish","format-standard","hentry","category-actualitate","tag-co2","tag-concentratie"],"_links":{"self":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts\/121743","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=121743"}],"version-history":[{"count":0,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts\/121743\/revisions"}],"wp:attachment":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=121743"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=121743"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=121743"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}