Ryt\u0173 Antarktidoje \u017eiemos \u012fkar\u0161tyje j\u016bros lede atsiv\u0117r\u0117 mil\u017eini\u0161ka atviro vandens zona, kurios plotas siek\u0117 apie 90 000 kvadratini\u0173 kilometr\u0173. Tai \u0161iek tiek ma\u017eiau nei Portugalijos teritorija ir, mokslinink\u0173 teigimu, tokio rei\u0161kinio \u0161ioje vietoje ir \u0161iuo met\u0173 laiku iki \u0161iol nebuvo fiksuota.<\/p>\n
Ne\u012fprastas darinys buvo pasteb\u0117tas Breido \u012flankoje 2024 met\u0173 rugpj\u016bt\u012f, kai \u0161is regionas paprastai b\u016bna vientisai sukaustytas ledo. Palydoviniai steb\u0117jimai parod\u0117 didel\u012f atviro vandens plot\u0105, i\u0161silaikius\u012f tarp aplinkinio j\u016bros ledo.<\/p>\n
Kas atv\u0117r\u0117 skyl\u0119 lede?<\/p>\n
Tyr\u0117jai ai\u0161kina, kad skyl\u0117 susiformavo d\u0117l keli\u0173 vienu metu sutapusi\u0173 ekstremali\u0173 veiksni\u0173. Pagrindin\u012f vaidmen\u012f atliko atmosferos up\u0117s, siauros, ta\u010diau itin dr\u0117gnos oro masi\u0173 juostos, perne\u0161an\u010dios didelius vandens gar\u0173 kiekius i\u0161 \u0161iltesni\u0173 platum\u0173 \u012f poliarinius regionus.<\/p>\n
2024 met\u0173 liepos ir rugpj\u016b\u010dio m\u0117nesiais link Antarktidos nusidriek\u0117 keli tokie srautai, atne\u0161\u0119 \u0161iltesn\u012f ir dr\u0117gnesn\u012f or\u0105. D\u0117l to sustipr\u0117jo \u0161iluminis fonas, o \u012f vandenyno pavir\u0161i\u0173 pateko daugiau \u0161ilumos, tod\u0117l ledui formuotis tapo gerokai sunkiau.<\/p>\n
Tuo pat metu stipr\u016bs v\u0117jai pakeit\u0117 pavir\u0161ini\u0173 vanden\u0173 jud\u0117jim\u0105 ir paskatino gilesni\u0173, \u0161iltesni\u0173 vandens masi\u0173 kilim\u0105 \u012f vir\u0161\u0173. \u0160is procesas da\u017enai siejamas su Ekmano efektu, kai v\u0117jas stumia pavir\u0161in\u012f vanden\u012f, o jo viet\u0105 u\u017eima i\u0161 gylio pakil\u0119s \u0161iltesnis vanduo.<\/p>\n
Kod\u0117l tai svarbu klimatui?<\/p>\n
Kai \u0161iltesnis vanduo pasiekia pavir\u0161i\u0173, jis ne tik stabdo u\u017e\u0161alim\u0105, bet ir padeda i\u0161laikyti atviro vandens plot\u0105 net tada, kai aplinkui ledo danga tur\u0117t\u0173 stor\u0117ti. Tokia kombinacija gali veikti kaip savoti\u0161kas pastiprinantis mechanizmas, nes atviras vanduo sugeria daugiau \u0161ilumos nei ledas.<\/p>\n
Autoriai persp\u0117ja, kad ateityje pana\u0161ios skyl\u0117s gali pasitaikyti da\u017eniau, jei d\u0117l klimato kaitos stipr\u0117s atmosferos up\u0117s ir daug\u0117s j\u016brini\u0173 kar\u0161\u010dio bang\u0173. Tai reik\u0161t\u0173 papildom\u0105 spaudim\u0105 j\u016bros ledo stabilumui net ir regionuose, kurie anks\u010diau buvo laikomi atsparesniais.<\/p>\n","protected":false},"excerpt":{"rendered":"
Ryt\u0173 Antarktidoje \u017eiemos metu atsiv\u0117r\u0117 apie 90 000 kv. km atviro vandens plotas: mokslininkai ai\u0161kina, kaip tai l\u0117m\u0117 atmosferos up\u0117s, v\u0117jai ir \u0161iltesnis vanduo.<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[7],"tags":[4540,43019,45575,101,4816,673,33798],"miestas":[],"class_list":["post-59589","post","type-post","status-publish","format-standard","hentry","category-technologijos","tag-antarktida","tag-atmosferos-upes","tag-ekmano-efektas","tag-ekologija","tag-juros-ledas","tag-klimato-kaita","tag-pietu-vandenynas"],"acf":[],"_links":{"self":[{"href":"https:\/\/cp.snarskis.lt\/index.php\/wp-json\/wp\/v2\/posts\/59589","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cp.snarskis.lt\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cp.snarskis.lt\/index.php\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/cp.snarskis.lt\/index.php\/wp-json\/wp\/v2\/comments?post=59589"}],"version-history":[{"count":0,"href":"https:\/\/cp.snarskis.lt\/index.php\/wp-json\/wp\/v2\/posts\/59589\/revisions"}],"wp:attachment":[{"href":"https:\/\/cp.snarskis.lt\/index.php\/wp-json\/wp\/v2\/media?parent=59589"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cp.snarskis.lt\/index.php\/wp-json\/wp\/v2\/categories?post=59589"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cp.snarskis.lt\/index.php\/wp-json\/wp\/v2\/tags?post=59589"},{"taxonomy":"miestas","embeddable":true,"href":"https:\/\/cp.snarskis.lt\/index.php\/wp-json\/wp\/v2\/miestas?post=59589"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}