{"id":434,"date":"2017-05-25T13:05:00","date_gmt":"2017-05-25T11:05:00","guid":{"rendered":"https:\/\/kids.esa.int\/esa_satellites_spot_coral_reefs_in_danger\/"},"modified":"2026-10-08T00:28:09","modified_gmt":"2026-10-07T22:28:09","slug":"esa_satellites_spot_coral_reefs_in_danger","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/esa_satellites_spot_coral_reefs_in_danger\/","title":{"rendered":"ESA-satellitter opdager truede koralrev"},"content":{"rendered":"<div class=\"lede\">\n<p>Det Store Barriererev i Australien er et omr\u00e5de af enest\u00e5ende naturlig sk\u00f8nhed. Det str\u00e6kker sig over mere end 2000 km og er hjemsted for havdyr som rokker, bl\u00f8ddyr, delfiner, tropiske fisk, havskildpadder og mere end 400 koralarter. Ved f\u00f8rste \u00f8jekast ligner koraller planter, men de er faktisk en m\u00e6rkelig dyreart, der f\u00e6stner sig til klipperne. Koraller str\u00e6kker sig over enorme omr\u00e5der og udg\u00f8r en vigtig del af Jordens \u00f8kosystem.<\/p>\n<\/div>\n<p>Forskere har brugt ESA\u2019s Sentinel-2-satellitter til at fotografere korallerne i Great Barrier Reef. De har gjort en bekymrende opdagelse: De gr\u00f8nne alger, der lever i korallerne, og som korallerne har brug for for at overleve, bliver beskadiget og endda \u00f8delagt.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1195\" data-credit=\"EOMAP\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/05\/The_brightest_parts_are_coral_being_bleached\" 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\/2017\/05\/the_brightest_parts_are_coral_being_bleached\/18248030-2-eng-GB\/The_brightest_parts_are_coral_being_bleached.png\" alt=\"The brightest parts are coral being bleached\"><figcaption>De lyseste omr\u00e5der er koraller, der er blevet blegede<\/figcaption><\/figure>\n<p>Dette f\u00e6nomen kaldes koralblegning og skyldes, at den globale opvarmning g\u00f8r havvandet for varmt for algerne. Koraller kan forblive blegede i omkring seks uger. Derefter kan de enten komme sig eller d\u00f8 helt, hvilket er meget d\u00e5rlige nyheder for alle de planter og dyr, der lever i korallerne og er afh\u00e6ngige af dem som f\u00f8de.<\/p>\n<p>Dykkere kan selv unders\u00f8ge korallernes tilstand, men det tager lang tid og betyder, at man kun kan unders\u00f8ge sm\u00e5 omr\u00e5der. Ved hj\u00e6lp af ESA\u2019s Sentinel-2-satellitter kan man overv\u00e5ge langt st\u00f8rre omr\u00e5der, hvilket er en bedre m\u00e5de at holde \u00f8je med, hvor sunde korallerne er.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1920\" data-credit=\"ESA\/ATG medialab\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/05\/ESA_s_Sentinel_satellites_have_been_watching_the_Great_Barrier_Reef\" 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\/2017\/05\/esa_s_sentinel_satellites_have_been_watching_the_great_barrier_reef\/17884472-2-eng-GB\/ESA_s_Sentinel_satellites_have_been_watching_the_Great_Barrier_Reef.jpg\" alt=\"ESA\u2019s Sentinel satellites have been watching the Great Barrier Reef\"><figcaption>ESA\u2019s Sentinel-satellitter har overv\u00e5get Great Barrier Reef<\/figcaption><\/figure>\n<p>Det er ikke f\u00f8rste gang, at satellitter er blevet brugt til at overv\u00e5ge koralrev som Det Store Barriererev. Sentinel-2-satellitterne er imidlertid s\u00e6rdeles velegnede til denne opgave, da de tager billeder i meget h\u00f8j opl\u00f8sning og passerer regelm\u00e6ssigt over omr\u00e5det, hvorved de hurtigt kan opdage koraller, der er ved at blege.<\/p>\n<p>ESA er i \u00f8jeblikket i gang med at udvikle et nyt computerprogram, der skal hj\u00e6lpe med at analysere satellitbilleder af koralrev hurtigt og pr\u00e6cist. Jo mere vi ved om koralblegning, desto bedre kan vi beskytte disse vigtige dele af vores planet.<\/p>\n<p><b>Sjovt faktum:<\/b> Forskere, der unders\u00f8ger Great Barrier Reef, har fundet k\u00e6mpemuslinger, der er over 120 \u00e5r gamle!<\/p>","protected":false},"excerpt":{"rendered":"<p>The Great Barrier Reef in Australia is an area of outstanding natural beauty. More than 2000km long, it is home to sealife like rays, molluscs, dolphins, tropical fish, sea turtles, [&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\/2017\/05\/the_great_barrier_reef_is_home_to_hundreds_of_types_of_coral\/17896497-2-eng-GB\/The_Great_Barrier_Reef_is_home_to_hundreds_of_types_of_coral.jpg","esa_banner_description":"The Great Barrier Reef is home to hundreds of types of coral","esa_banner_credit":"T. Hudson\/Wikipedia","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/05\/The_Great_Barrier_Reef_is_home_to_hundreds_of_types_of_coral","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-434","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\/434","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=434"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/434\/revisions"}],"predecessor-version":[{"id":4470,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/434\/revisions\/4470"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=434"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=434"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=434"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=434"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=434"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=434"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=434"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=434"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=434"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=434"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}