{"id":697023,"date":"2026-06-10T00:26:03","date_gmt":"2026-06-10T00:26:03","guid":{"rendered":"https:\/\/microscopemedia.com\/?p=697023"},"modified":"2026-06-10T00:26:03","modified_gmt":"2026-06-10T00:26:03","slug":"oamenii-de-stiinta-fac-progrese-in-intelegerea-modului-in-care-se-formeaza-gheata","status":"publish","type":"post","link":"https:\/\/microscopemedia.com\/?p=697023","title":{"rendered":"Oamenii de \u0219tiin\u021b\u0103 fac progrese \u00een \u00een\u021belegerea modului \u00een care se formeaz\u0103 ghea\u021ba"},"content":{"rendered":"<div><img decoding=\"async\" src=\"https:\/\/microscopemedia.com\/wp-content\/uploads\/2026\/06\/oamenii-de-stiinta-fac-progrese-in-intelegerea-modului-in-care-se-formeaza-gheata.jpg\" class=\"ff-og-image-inserted\"><\/div>\n<p id=\"p-0\">Studiile recente realizate cu ajutorul instala\u021biei European XFEL au permis observarea \u00een timp real a primelor microsecunde ale procesului de \u00eenghe\u021b, oferind imagini f\u0103r\u0103 precedent asupra modului \u00een care se formeaz\u0103 nucleele cristaline de ghea\u021ba \u00een lichide suprar\u0103cite, se arat\u0103 \u00een jurnalul Nature.<\/p>\n<p id=\"p-1\">Cercet\u0103rile vin \u00eentr-un domeniu \u00een care teoriile clasice, dezvoltate \u00eenc\u0103 din lucr\u0103rile lui Josiah Willard Gibbs \u0219i formalizate ulterior \u00een teoria clasic\u0103 a nuclea\u021biei, au e\u0219uat s\u0103 explice cu precizie viteza real\u0103 de formare a cristalelor. Diferen\u021bele dintre predic\u021bii \u0219i experimente pot ajunge, \u00een unele cazuri, la zeci de ordine de m\u0103rime.<\/p>\n<p id=\"p-2\">O echip\u0103 interna\u021bional\u0103 de fizicieni a folosit jeturi de lichide simple precum kriptonul \u0219i argonul pentru a studia \u00eenghe\u021barea \u00een condi\u021bii controlate. Rezultatele arat\u0103 c\u0103 tranzi\u021bia de la lichid la solid are loc \u00een doar c\u00e2teva microsecunde, pe distan\u021be de ordinul sutelor de micrometri.<\/p>\n<p id=\"p-3\">De\u0219i modelele teoretice r\u0103m\u00e2n imperfecte, aceste experimente au redus semnificativ diferen\u021ba dintre predic\u021bii \u0219i observa\u021bii, aduc\u00e2nd comunitatea \u0219tiin\u021bific\u0103 mai aproape de o descriere unificat\u0103 a fenomenului.<\/p>\n<h2 id=\"chapter-0\">Simul\u0103ri computerizate avansate<\/h2>\n<p id=\"p-4\">Un alt progres important vine din utilizarea simul\u0103rilor computerizate avansate. Acestea sugereaz\u0103 c\u0103 formarea ghe\u021bii nu urmeaz\u0103 o structur\u0103 perfect sferic\u0103, a\u0219a cum presupunea teoria clasic\u0103, ci implic\u0103 configura\u021bii atomice mult mai variate \u0219i dezordonate dec\u00e2t se credea anterior.<\/p>\n<p id=\"p-5\">Fenomenul are implica\u021bii majore nu doar \u00een fizica fundamental\u0103, ci \u0219i \u00een modelarea climei globale. Cristalele de ghea\u021b\u0103 din nori \u2013 \u00een special cei de mare altitudine \u2013 influen\u021beaz\u0103 bilan\u021bul de radia\u021bie al P\u0103m\u00e2ntului \u0219i, implicit, evolu\u021bia \u00eenc\u0103lzirii globale.<\/p>\n<p id=\"p-6\">Cercet\u0103torii subliniaz\u0103 c\u0103 \u00eembun\u0103t\u0103\u021birea \u00een\u021belegerii nuclea\u021biei omogene ar putea duce la modele climatice mai precise. Dar, ar putea contribui \u0219i la aplica\u021bii \u00een geofizic\u0103 \u0219i \u0219tiin\u021ba materialelor, inclusiv \u00een \u00een\u021belegerea form\u0103rii nucleului solid al P\u0103m\u00e2ntului sau a solidific\u0103rii metalelor.<\/p>\n<p id=\"p-7\">De\u0219i progresele sunt semnificative, exper\u021bii avertizeaz\u0103 c\u0103 <a href=\"https:\/\/www.mediafax.ro\/stiinta-sanatate\/ce-ascunde-antarctica-sub-kilometri-de-gheata-o-capsula-a-timpului-i-a-uimit-pe-cercetatori-23752163\" target=\"_blank\" rel=\"noopener\">procesul <\/a>r\u0103m\u00e2ne departe de a fi complet explicat. Diferen\u021bele dintre experimente \u0219i simul\u0103ri continu\u0103 s\u0103 fie de ordinul a p\u00e2n\u0103 la 20 de ordine de m\u0103rime \u00een unele cazuri.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Studiile recente realizate cu ajutorul instala\u021biei European XFEL au permis observarea \u00een timp real a primelor microsecunde ale procesului de \u00eenghe\u021b, oferind imagini f\u0103r\u0103 precedent asupra modului \u00een care se &hellip; <a href=\"https:\/\/microscopemedia.com\/?p=697023\" class=\"more-link\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":697024,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"Default","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/posts\/697023"}],"collection":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=697023"}],"version-history":[{"count":0,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/posts\/697023\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/media\/697024"}],"wp:attachment":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=697023"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=697023"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=697023"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}