{"id":985,"date":"2005-09-09T10:02:00","date_gmt":"2005-09-09T08:02:00","guid":{"rendered":"https:\/\/kids.esa.int\/swollen_ozone_hole_over_south_pole\/"},"modified":"2026-10-08T00:34:32","modified_gmt":"2026-10-07T22:34:32","slug":"swollen_ozone_hole_over_south_pole","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/swollen_ozone_hole_over_south_pole\/","title":{"rendered":"Det udvidede ozonhul over Sydpolen"},"content":{"rendered":"
\n

H\u00f8jt over det isd\u00e6kkede kontinent Antarktis holder ESA\u2019s rumfart\u00f8j Envisat vagt \u2013 og det, som dets instrumenter registrerer, er temmelig foruroligende.<\/p>\n<\/div>\n

Frysetemperaturer og menneskeskabte kemikalier bidrager sammen til at skabe et \u2018hul\u2019 i ozonlaget. Og dette \u00e5rs ozonhul ser ud til at blive et af de st\u00f8rste, der nogensinde er registreret.<\/p>\n

I midten af august 2005 var den allerede vokset til et areal p\u00e5 10 millioner kvadratkilometer \u2013 omtrent lige s\u00e5 stort som Europa. Og man forventede, at den ville udvide sig endnu mere i l\u00f8bet af september.<\/p>\n

Ozonhullet blev f\u00f8rst opdaget i midten af 1980\u2019erne, og ESA\u2019s satellitter har overv\u00e5get ozonhullet kontinuerligt siden 1995. Deres m\u00e5linger viser, at kun ozonhullerne fra 1996 og 2000 var st\u00f8rre p\u00e5 denne tid af \u00e5ret.<\/p>\n

\"ESA's
ESA\u2019s milj\u00f8satellit Envisat<\/figcaption><\/figure>\n

Ozon er en form for ilt. Der findes sm\u00e5 m\u00e6ngder ozon i stratosf\u00e6ren, mellem 20 og 50 km over Jorden.<\/p>\n

Heldigvis for os beskytter ozonlaget os mod solens ultraviolette str\u00e5ling, som kan for\u00e5rsage hudkr\u00e6ft. Imidlertid \u00f8del\u00e6gger kemiske reaktioner, der involverer menneskeskabt klor i de h\u00f8je skylag, ozonlaget.<\/p>\n

N\u00e5r for\u00e5ret indfinder sig ved polerne, f\u00e5r kombinationen af det tilbagevendende sollys og klorets kemiske egenskaber ozonmolekylerne til at spaltes til ilt. Et enkelt klormolekyle kan nedbryde tusindvis af ozonmolekyler.<\/p>\n

Oplysninger fra Envisat er af afg\u00f8rende betydning for overv\u00e5gningen af de s\u00e6sonm\u00e6ssige \u00e6ndringer i dette beskyttende lag. Satellitdataene indg\u00e5r i en ozonoverv\u00e5gnings- og prognosetjeneste, der fungerer n\u00e6sten i realtid, og som best\u00e5r af mere end 30 partnere fra 11 lande.<\/p>","protected":false},"excerpt":{"rendered":"

High above the icy continent of Antarctica, ESA\u2019s Envisat spacecraft is keeping watch – and what its instruments see is rather disturbing. Freezing temperatures and man-made chemicals are combining to […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2005\/09\/ozone_forecast_for_9_september2\/17880735-2-eng-GB\/Ozone_forecast_for_9_September.jpg","esa_banner_description":"Ozone forecast for 9 September","esa_banner_credit":"KNMI\/ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2005\/09\/Ozone_forecast_for_9_September2","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[26],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-985","post","type-post","status-publish","format-standard","hentry","category-news"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/985","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/comments?post=985"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/985\/revisions"}],"predecessor-version":[{"id":4777,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/985\/revisions\/4777"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=985"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=985"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=985"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=985"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=985"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=985"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=985"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=985"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=985"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=985"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}