{"id":18140,"date":"2020-04-18T09:24:33","date_gmt":"2020-04-18T09:24:33","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=18140"},"modified":"2020-04-18T09:24:33","modified_gmt":"2020-04-18T09:24:33","slug":"martian-climate-change-ice-caps","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/ro\/science\/planetary-science\/martian-climate-change-ice-caps\/","title":{"rendered":"Dezv\u0103luirea tiparelor schimb\u0103rilor climatice de pe Marte, ascunse \u00een calotele glaciare"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Tiparele schimb\u0103rilor climatice de pe Marte dezv\u0103luite \u00een calotele glaciare<\/h2>\n\n<h2 class=\"wp-block-heading\">Calotele glaciare ca arhive ale istoriei climatice<\/h2>\n\n<p>La fel ca P\u0103m\u00e2ntul, Marte a suferit schimb\u0103ri climatice semnificative de-a lungul timpului. Aceste schimb\u0103ri sunt \u00eenregistrate \u00een calotele glaciare de la polii planetei, care ac\u021bioneaz\u0103 ca o arhiv\u0103 \u00eenghe\u021bat\u0103 a condi\u021biilor climatice trecute.<\/p>\n\n<h2 class=\"wp-block-heading\">Geometria orbital\u0103 \u0219i ciclurile climatice<\/h2>\n\n<p>Unul dintre principalii factori care influen\u021beaz\u0103 schimb\u0103rile climatice at\u00e2t pe P\u0103m\u00e2nt, c\u00e2t \u0219i pe Marte, este geometria orbital\u0103 a planetei. Aceasta se refer\u0103 la \u00eenclinarea axei planetei \u0219i la momentul orbitei sale \u00een jurul soarelui. Atunci c\u00e2nd emisfera nordic\u0103 este mai pu\u021bin \u00eenclinat\u0103 spre soare \u00een timpul verii \u0219i planeta este cea mai \u00eendep\u0103rtat\u0103 de soare pe orbita sa, condi\u021biile sunt mai favorabile pentru perioadele glaciare.<\/p>\n\n<h2 class=\"wp-block-heading\">Dovezi din imagistica radar<\/h2>\n\n<p>Oamenii de \u0219tiin\u021b\u0103 au folosit tehnologia de imagistic\u0103 radar pentru a studia straturile de ghea\u021b\u0103 din calotele polare mar\u021biene. Aceast\u0103 tehnologie le permite s\u0103 p\u0103trund\u0103 \u00een ghea\u021b\u0103 \u0219i s\u0103 detecteze varia\u021bii \u00een compozi\u021bia acesteia. Aceste varia\u021bii pot oferi informa\u021bii despre condi\u021biile climatice trecute.<\/p>\n\n<h2 class=\"wp-block-heading\">Ghea\u021b\u0103 murdar\u0103 \u0219i oscila\u021bii climatice<\/h2>\n\n<p>Ghea\u021ba din calotele polare mar\u021biene con\u021bine cantit\u0103\u021bi variate de murd\u0103rie \u0219i praf. Se crede c\u0103 aceste impurit\u0103\u021bi se depun \u00een timpul diferitelor perioade climatice, care au niveluri diferite de praf \u00een atmosfer\u0103.<\/p>\n\n<h2 class=\"wp-block-heading\">Dou\u0103 modele pentru acumularea de murd\u0103rie<\/h2>\n\n<p>Exist\u0103 dou\u0103 modele principale pentru modul \u00een care murd\u0103ria devine concentrat\u0103 \u00een ghea\u021b\u0103:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>Modelul de evaporare:<\/strong> \u00cen perioadele de evaporare mai intens\u0103, ghea\u021ba sublimeaz\u0103, l\u0103s\u00e2nd \u00een urm\u0103 concentra\u021bii mai mari de murd\u0103rie.<\/li>\n<li><strong>Modelul de acumulare a prafului:<\/strong> \u00cen perioadele de activitate crescut\u0103 a prafului \u00een atmosfer\u0103, mai mult praf cade pe ghea\u021b\u0103, duc\u00e2nd la un con\u021binut mai mare de murd\u0103rie.<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">Reflectivitatea radar \u0219i acumularea de praf<\/h2>\n\n<p>Datele de imagistic\u0103 radar sus\u021bin modelul de acumulare a prafului. Reflectivitatea straturilor de ghea\u021b\u0103, a\u0219a cum este detectat\u0103 de radar, este influen\u021bat\u0103 de diferen\u021bele de con\u021binut de murd\u0103rie.<\/p>\n\n<h2 class=\"wp-block-heading\">Provoc\u0103ri \u00een legarea unor ere glaciare specifice<\/h2>\n\n<p>De\u0219i datele radar ofer\u0103 dovezi ale schimb\u0103rilor climatice, acestea sunt \u00een prezent prea grosiere pentru a lega caracteristici specifice ale straturilor de ghea\u021b\u0103 de &#8220;erele glaciare&#8221; mar\u021biene specifice.<\/p>\n\n<h2 class=\"wp-block-heading\">Rezultate spectaculoase ale radarului<\/h2>\n\n<p>\u00cen ciuda acestei limit\u0103ri, tehnologia de imagistic\u0103 radar a dat rezultate spectaculoase. Oamenii de \u0219tiin\u021b\u0103 au reu\u0219it s\u0103 cartografieze straturi continue de ghea\u021b\u0103 subteran\u0103 \u00een trei dimensiuni pe o vast\u0103 zon\u0103 a calotei polare mar\u021biene.<\/p>\n\n<h2 class=\"wp-block-heading\">Dezv\u0103luirea istoriei climatice mar\u021biene<\/h2>\n\n<p>Studiul calotelor glaciare mar\u021biene ofer\u0103 informa\u021bii valoroase despre clima trecut\u0103 a planetei. Analiz\u00e2nd varia\u021biile \u00een compozi\u021bia \u0219i structura ghe\u021bii, oamenii de \u0219tiin\u021b\u0103 pot reconstitui o istorie detaliat\u0103 a schimb\u0103rilor climatice mar\u021biene, ajut\u00e2ndu-ne s\u0103 \u00een\u021belegem cum a evoluat planeta de-a lungul timpului.<\/p>\n\n<h2 class=\"wp-block-heading\">Informa\u021bii suplimentare:<\/h2>\n\n<ul class=\"wp-block-list\">\n<li>Vizita\u021bi site-ul web al NASA pentru mai multe detalii despre acest studiu \u0219i imagini suplimentare ale datelor radar de la calota polar\u0103.<\/li>\n<li>Afla\u021bi mai multe despre instrumentul Shallow Radar de pe Mars Reconnaissance Orbiter.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Tiparele schimb\u0103rilor climatice de pe Marte dezv\u0103luite \u00een calotele glaciare Calotele glaciare ca arhive ale istoriei climatice La fel ca P\u0103m\u00e2ntul, Marte a suferit schimb\u0103ri climatice semnificative de-a lungul timpului.&hellip;<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[985],"tags":[7756,434,23721,23720,815],"class_list":["post-18140","post","type-post","status-publish","format-standard","hentry","category-planetary-science","tag-ice-caps","tag-space-exploration","tag-radar-imaging","tag-martian-climate-change","tag-planetary-science"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/18140","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=18140"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/18140\/revisions"}],"predecessor-version":[{"id":18141,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/18140\/revisions\/18141"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/media?parent=18140"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/categories?post=18140"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/tags?post=18140"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}