Nature Climate Change, 18 mars 2026<\/p>\n
Havsisens utbredning runt Antarktis var ganska stabil eller mycket svagt (1-2%) expanderande under flera decennier tills den n\u00e5dde rekordl\u00e5ga niv\u00e5er 2017, d\u00e5 starka vindar kastade upp varmt vatten fr\u00e5n djuphavet och br\u00f6t igenom det \u201cvintervatten\u201d -lager som tidigare skyddade isen fr\u00e5n att sm\u00e4lta. Antarktis vintervatten isolerar havsisen fr\u00e5n det varma cirkumpol\u00e4ra djupvattnet fr\u00e5n tropikerna som omger kontinenten. Tv\u00e5 decenniers m\u00e4tningar visar nu att det antarktiska vintervattnet har tunnats ut \u00f6ver stora delar av S\u00f6dra ishavet. N\u00e4r kraftiga stormar 2015 r\u00f6rde upp havet och blandade varmare djupvatten med detta kallvattenlager f\u00f6rsvann skyddet och havsisen sm\u00e4lte i rekordfart. Antarktis havsis har inte \u00e5terh\u00e4mtat sig sedan dess. Medan avvikande vindar drev fram 2015 \u00e5rs rekordl\u00e5ga niv\u00e5, tyder den ih\u00e5llande bristen p\u00e5 havsis sedan dess p\u00e5 att vintervattnet fortfarande \u00e4r f\u00f6r tunt f\u00f6r att f\u00f6rhindra att djupvattnet b\u00f6ljar upp mot isen. Detta regimskifte utg\u00f6r en allvarlig risk f\u00f6r polararter, inklusive krill som \u00e4r beroende av stabil havsis, och hotar den framtida stabiliteten hos Antarktis ishyllor. Det kan ocks\u00e5 p\u00e5verka de globala havsstr\u00f6mmarna, inklusive den viktiga AMOC-cirkulationen (Atlantic Meridional Overturning Circulation), vilket f\u00e5r mer omfattande konsekvenser f\u00f6r det globala klimatet och v\u00e4dret.<\/p>\n
Papper<\/a> | Sammanfattning av G\u00f6teborgs universitet<\/a> | Nyhetsbevakning<\/a><\/p>","protected":false},"excerpt":{"rendered":" Nature Climate Change, 18 March 2026 Sea ice extent around Antarctica was fairly stable or very slightly (1-2%) expanding for several decades until reaching record-breaking lows in 2017, when strong winds churned up warm water from the deep ocean, breaking through the “winter water” layer that previously protected the ice from melting. Antarctic winter water […]\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[152],"tags":[],"class_list":["post-7587","post","type-post","status-publish","format-standard","hentry","category-cryosphere-capsules"],"modified_by":"Pam Pearson","_links":{"self":[{"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/posts\/7587","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/comments?post=7587"}],"version-history":[{"count":1,"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/posts\/7587\/revisions"}],"predecessor-version":[{"id":7588,"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/posts\/7587\/revisions\/7588"}],"wp:attachment":[{"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/media?parent=7587"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/categories?post=7587"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/tags?post=7587"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}