{"id":935,"date":"2004-12-03T09:37:00","date_gmt":"2004-12-03T08:37:00","guid":{"rendered":"https:\/\/kids.esa.int\/lakes\/"},"modified":"2026-10-08T00:33:57","modified_gmt":"2026-10-07T22:33:57","slug":"lakes","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/lakes\/","title":{"rendered":"S\u00f8er"},"content":{"rendered":"
\n

S\u00f8er er v\u00e6rdifulde kilder til vand og f\u00f8devarer, is\u00e6r i fattige lande. De kan dog let tages skade af overudnyttelse, forurening og klimaforandringer. \u00c6ndringer i s\u00f8ernes st\u00f8rrelse og kystlinjer kan let ses fra rummet.<\/p>\n<\/div>\n

S\u00e5danne oplysninger er meget v\u00e6rdifulde i fjerntliggende omr\u00e5der og fattige lande. De viser, hvordan vandstanden p\u00e5virkes af landbruget og vejret. De advarer desuden folk, der bor i n\u00e6rheden, om oversv\u00f8mmelser.<\/p>\n

Satellitter leverer ogs\u00e5 vigtige oplysninger om s\u00f8ernes tilstand, herunder vandtemperatur, farve og forurening.<\/p>\n

Et af de mest dramatiske eksempler er Arals\u00f8en i Kasakhstan. Den var engang verdens fjerdest\u00f8rste s\u00f8, men er i l\u00f8bet af de sidste 45 \u00e5r skrumpet ind til mindre end halvdelen af sin oprindelige st\u00f8rrelse.
Billeder fra satellitter som f.eks. ESA\u2019s Envisat viser, hvordan menneskelig aktivitet har reduceret de floder, der l\u00f8ber ud i Arals\u00f8en, til en lille str\u00f8m. Som f\u00f8lge heraf er s\u00f8en faktisk blevet delt i to. Der er nu en 40.000 kvadratkilometer stor \u00f8rken af hvid, salt jord tilbage langs s\u00f8ens bredder.<\/p>\n

Radarinstrumenter i rummet kan ogs\u00e5 m\u00e5le \u00e6ndringer i vandstanden i s\u00f8er og de floder, der l\u00f8ber ud i dem. I det meste af Arals\u00f8en er vandstanden faldet med 14 meter siden 1960\u2019erne. Bestr\u00e6belserne p\u00e5 at h\u00e6ve vandstanden og mindske saltholdigheden i den nordlige del af s\u00f8en har dog haft en vis succes i de seneste \u00e5r.<\/p>","protected":false},"excerpt":{"rendered":"

Lakes are valuable sources of water and food, particularly in poor countries. However, they are easily damaged by overuse, pollution and climate change. Changes in the sizes and shorelines of […]<\/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\/2003\/07\/the_shrinking_aral_sea_seen_from_envisat_s_meris2\/17873002-2-eng-GB\/The_shrinking_Aral_Sea_seen_from_Envisat_s_MERIS.jpg","esa_banner_description":"The shrinking Aral Sea, seen from Envisat's MERIS","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/07\/The_shrinking_Aral_Sea_seen_from_Envisat_s_MERIS2","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":[42,10,66],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-935","post","type-post","status-publish","format-standard","hentry","category-earth","category-learn","category-water-world","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/935","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=935"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/935\/revisions"}],"predecessor-version":[{"id":2078,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/935\/revisions\/2078"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=935"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=935"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=935"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=935"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=935"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=935"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=935"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=935"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=935"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=935"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}