{"id":16545,"date":"2022-10-31T17:39:34","date_gmt":"2022-10-31T17:39:34","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=16545"},"modified":"2022-10-31T17:39:34","modified_gmt":"2022-10-31T17:39:34","slug":"antarctica-sea-ice-growth-climate-change","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/ro\/science\/climate-science\/antarctica-sea-ice-growth-climate-change\/","title":{"rendered":"De ce cre\u0219te ghea\u021ba marin\u0103 din Antarctica pe m\u0103sur\u0103 ce cresc temperaturile?"},"content":{"rendered":"

De ce cre\u0219te ghea\u021ba marin\u0103 din jurul Antarcticii, \u00een timp ce temperaturile cresc?<\/h2>\n\n

\u00cen\u021belegerea fenomenului contraintuitiv<\/h2>\n\n

\u00cen ciuda cre\u0219terii temperaturilor globale, ghea\u021ba marin\u0103 din jurul Antarcticii \u0219i-a m\u0103rit \u00eentinderea. Acest fenomen contraintuitiv i-a nedumerit at\u00e2t pe oamenii de \u0219tiin\u021b\u0103, c\u00e2t \u0219i pe scepticii schimb\u0103rilor climatice.<\/p>\n\n

Rolul v\u00e2rtejului polar<\/h2>\n\n

Noi cercet\u0103ri sugereaz\u0103 c\u0103 un mecanism independent de schimb\u0103rile climatice este responsabil pentru cre\u0219terea ghe\u021bii: \u00eent\u0103rirea \u0219i convergen\u021ba v\u00e2rtejului polar, un v\u00e2rtej \u00eenvolburat de v\u00e2nturi care \u00eenconjoar\u0103 Polul Sud.<\/p>\n\n

Cum determin\u0103 v\u00e2rtejul polar cre\u0219terea ghe\u021bii<\/h2>\n\n

Cu ajutorul unui model computerizat, oamenii de \u0219tiin\u021b\u0103 au descoperit c\u0103 v\u00e2rtejul polar \u00eent\u0103rit \u00eempinge straturile plutitoare de ghea\u021b\u0103 marin\u0103 unele c\u0103tre altele, comprim\u00e2ndu-le \u00een creste groase. Aceste creste se topesc mai \u00eencet, duc\u00e2nd la o \u00eentindere mai mare a ghe\u021bii.<\/p>\n\n

Cre\u0219terea form\u0103rii de ghea\u021b\u0103 \u0219i reducerea topirii<\/h2>\n\n

Formarea crestelor de ghea\u021b\u0103 creeaz\u0103 mai mult\u0103 ap\u0103 deschis\u0103 \u0219i zone cu ghea\u021b\u0103 sub\u021bire, care sunt expuse aerului rece \u00een timpul iernii, duc\u00e2nd la o cre\u0219tere a form\u0103rii de ghea\u021b\u0103. \u00centre timp, crestele, \u00eengr\u0103m\u0103dite de v\u00e2nt, se mic\u0219oreaz\u0103 mai pu\u021bin pe parcursul verii, deoarece ghea\u021ba mai groas\u0103 tinde s\u0103 supravie\u021buiasc\u0103 mai mult timp.<\/p>\n\n

Regiuni specifice cu cre\u0219tere a ghe\u021bii<\/h2>\n\n

Modelul a prezis cu exactitate cre\u0219terea ghe\u021bii \u00een m\u0103rile Weddell, Bellingshausen, Amundsen \u0219i Ross, unde a fost observat\u0103 cel mai distinct.<\/p>\n\n

Cauze posibile ale \u00eent\u0103ririi v\u00e2rtejului polar<\/h2>\n\n

Oamenii de \u0219tiin\u021b\u0103 \u00eenc\u0103 nu sunt siguri ce anume face ca v\u00e2rtejul polar s\u0103 devin\u0103 mai puternic. Un posibil vinovat este gaura din stratul de ozon, care afecteaz\u0103 echilibrul local \u0219i transferul de energie, duc\u00e2nd poten\u021bial la v\u00e2nturi mai puternice. O alt\u0103 posibilitate este ca v\u00e2nturile care se intensific\u0103 s\u0103 poat\u0103 fi pur \u0219i simplu puse pe seama variabilit\u0103\u021bii naturale.<\/p>\n\n

Impact limitat \u00een compara\u021bie cu pierderea de ghea\u021b\u0103 din Arctica<\/h2>\n\n

\u00cen timp ce efectul observat al cre\u0219terii ghe\u021bii \u00een Antarctica a fost relativ mic \u00een compara\u021bie cu ghea\u021ba care se tope\u0219te rapid \u00een Arctica, acesta ridic\u0103 \u00eentreb\u0103ri importante cu privire la interac\u021biunile complexe dintre schimb\u0103rile climatice \u0219i modelele meteorologice regionale.<\/p>\n\n

\u00cenc\u0103lzire continu\u0103 \u0219i impacturi viitoare<\/h2>\n\n

\u00cen ciuda tendin\u021bei actuale de cre\u0219tere a ghe\u021bii \u00een Antarctica, oamenii de \u0219tiin\u021b\u0103 subliniaz\u0103 c\u0103 este probabil s\u0103 fie cople\u0219it\u0103 de cre\u0219terea continu\u0103 a emisiilor de gaze cu efect de ser\u0103 \u0219i de schimb\u0103rile climatice pe care acestea le provoac\u0103. Dac\u0103 \u00eenc\u0103lzirea continu\u0103, tendin\u021ba de cre\u0219tere a ghe\u021bii se va inversa \u00een cele din urm\u0103.<\/p>\n\n

Implica\u021bii pentru \u00een\u021belegerea schimb\u0103rilor climatice<\/h2>\n\n

Cre\u0219terea contraintuitiv\u0103 a ghe\u021bii marine \u00een Antarctica subliniaz\u0103 necesitatea unor cercet\u0103ri continue \u0219i a unei \u00een\u021belegeri nuan\u021bate a schimb\u0103rilor climatice. Aceasta demonstreaz\u0103 c\u0103 modelele meteorologice regionale pot avea efecte complexe \u0219i uneori nea\u0219teptate asupra condi\u021biilor climatice locale.<\/p>","protected":false},"excerpt":{"rendered":"

De ce cre\u0219te ghea\u021ba marin\u0103 din jurul Antarcticii, \u00een timp ce temperaturile cresc? \u00cen\u021belegerea fenomenului contraintuitiv \u00cen ciuda cre\u0219terii temperaturilor globale, ghea\u021ba marin\u0103 din jurul Antarcticii \u0219i-a m\u0103rit \u00eentinderea. Acest…<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[284],"tags":[721,5567,21904,34,21905,19465],"class_list":["post-16545","post","type-post","status-publish","format-standard","hentry","category-climate-science","tag-antarctica","tag-sea-ice","tag-ice-ridging","tag-climate-change","tag-ozone-layer","tag-polar-vortex"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/16545","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/comments?post=16545"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/16545\/revisions"}],"predecessor-version":[{"id":16546,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/16545\/revisions\/16546"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/media?parent=16545"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/categories?post=16545"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/tags?post=16545"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}