{"id":991,"date":"2006-10-03T09:01:00","date_gmt":"2006-10-03T07:01:00","guid":{"rendered":"https:\/\/kids.esa.int\/record_ozone_loss_over_south_pole\/"},"modified":"2026-10-08T00:34:36","modified_gmt":"2026-10-07T22:34:36","slug":"record_ozone_loss_over_south_pole","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/record_ozone_loss_over_south_pole\/","title":{"rendered":"Enn\u00e4tyksellinen otsonin v\u00e4heneminen Etel\u00e4mantereen yl\u00e4puolella"},"content":{"rendered":"<div class=\"lede\">\n<p>Vuodesta 1985 l\u00e4htien tutkijat ovat seuranneet Etel\u00e4mantereen yl\u00e4puolella sijaitsevaa otsonikatoa. Oli toivottu, ett\u00e4 otsonikato kutistuisi v\u00e4hitellen, mutta ESA:n Envisat-avaruusluotaimen uusimmat tulokset ovat paljastaneet, ett\u00e4 otsonin v\u00e4heneminen on ollut enn\u00e4tyksellisen suurta.<\/p>\n<\/div>\n<p>2. lokakuuta tehdyt mittaukset osoittivat 40 miljoonan tonnin v\u00e4hennyksen, mik\u00e4 ylitti vuoden 2000 enn\u00e4tyksen. Lis\u00e4ksi t\u00e4m\u00e4n vuoden otsonikolo kattaa 28 miljoonan neli\u00f6kilometrin alueen, mik\u00e4 on l\u00e4hes yht\u00e4 suuri kuin vuoden 2000 kolo. My\u00f6s otsonikadon syvyys kilpailee aiempien enn\u00e4tysarvojen kanssa.<\/p>\n<p>\u201cT\u00e4llainen merkitt\u00e4v\u00e4 otsonin v\u00e4heneminen edellytt\u00e4\u00e4 eritt\u00e4in alhaisia l\u00e4mp\u00f6tiloja stratosf\u00e4\u00e4riss\u00e4 yhdistettyn\u00e4 auringonvaloon\u201d, sanoi ESA:n tutkija Claus Zehner. \u201cT\u00e4m\u00e4n vuoden \u00e4\u00e4rimm\u00e4inen otsonin v\u00e4heneminen selittyy sill\u00e4, ett\u00e4 l\u00e4mp\u00f6tilat Etel\u00e4mantereen yl\u00e4puolella laskivat noin miinus 92 celsiusasteeseen \u2013 mik\u00e4 on alhaisin alueella vuodesta 1979 l\u00e4htien mitattu l\u00e4mp\u00f6tila.\u201d<\/p>\n<figure class=\"wp-block-image size-natural\" data-width=\"400\" data-credit=\"KNMI\/TEMIS\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2006\/10\/Ozone_loss_over_the_South_Pole2\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2006\/10\/ozone_loss_over_the_south_pole2\/17906643-2-eng-GB\/Ozone_loss_over_the_South_Pole.gif\" alt=\"Ozone loss over the South Pole\"><figcaption>Otsonikato Etel\u00e4mantereen yl\u00e4puolella<\/figcaption><\/figure>\n<p>Otsoni on er\u00e4s happikaasun muoto. Se muodostaa kerroksen 25\u201340 km:n korkeudella maanpinnasta, alueella, jota kutsutaan stratosf\u00e4\u00e4riksi. Otsonikerros on t\u00e4rke\u00e4, koska se est\u00e4\u00e4 auringon haitallisten ultraviolettis\u00e4teiden p\u00e4\u00e4syn maahan. N\u00e4m\u00e4 s\u00e4teet lis\u00e4\u00e4v\u00e4t ihosy\u00f6v\u00e4n ja silm\u00e4n kaihin riski\u00e4 sek\u00e4 vaikuttavat meren el\u00e4m\u00e4\u00e4n.<\/p>\n<p>Otsonikerroksen ohentuminen johtuu ihmisen aiheuttamista saasteista, kuten kloorista, jotka pysyv\u00e4t ilmakeh\u00e4ss\u00e4 monien vuosien ajan. Kun napaseudulla koittaa kev\u00e4t, auringonvalo vapauttaa korkealla sijaitseviin pilviin kertyneen kloorin. Kloori tuhoaa sitten otsonin nopeasti.<\/p>\n<p>Aukko s\u00e4ilyy yleens\u00e4 marraskuuhun tai joulukuuhun asti, jolloin Etel\u00e4mantereen yl\u00e4puolella oleva otsonipitoisuudeltaan v\u00e4h\u00e4inen ilma alkaa sekoittua ulkopuolelta tulevaan otsonipitoiseen ilmaan.<\/p>","protected":false},"excerpt":{"rendered":"<p>Since 1985, scientists have been monitoring a hole in the ozone layer, high above Antarctica. It had been hoped that the ozone hole will gradually shrink, but new results from [&hellip;]<\/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\/2006\/10\/2006_ozone_hole2\/18249140-2-eng-GB\/2006_ozone_hole.gif","esa_banner_description":"2006 ozone hole","esa_banner_credit":"KNMI\/TEMIS","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2006\/10\/2006_ozone_hole2","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":[64,42,10],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-991","post","type-post","status-publish","format-standard","hentry","category-climate-change","category-earth","category-learn"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/991","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/comments?post=991"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/991\/revisions"}],"predecessor-version":[{"id":4782,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/991\/revisions\/4782"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=991"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=991"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=991"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=991"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=991"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=991"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=991"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=991"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=991"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=991"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}