{"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\/sv\/esa_satellites_spot_coral_reefs_in_danger\/","title":{"rendered":"ESA:s satelliter uppt\u00e4cker hotade korallrev"},"content":{"rendered":"<div class=\"lede\">\n<p>Stora barri\u00e4rrevet i Australien \u00e4r ett omr\u00e5de med enast\u00e5ende natursk\u00f6nhet. Det \u00e4r \u00f6ver 2 000 km l\u00e5ngt och hyser havslevande djur som rockor, bl\u00f6tdjur, delfiner, tropiska fiskar, havssk\u00f6ldpaddor och mer \u00e4n 400 olika korallarter. Vid f\u00f6rsta anblicken ser koraller ut som v\u00e4xter, men de \u00e4r egentligen en m\u00e4rklig typ av djur som f\u00e4ster sig vid stenar. Korallerna str\u00e4cker sig \u00f6ver enorma omr\u00e5den och utg\u00f6r en viktig del av jordens ekosystem.<\/p>\n<\/div>\n<p>Forskare har anv\u00e4nt ESA:s Sentinel-2-satelliter f\u00f6r att fotografera korallerna i Stora barri\u00e4rrevet. De har gjort en oroande uppt\u00e4ckt: de gr\u00f6na alger som lever i korallerna \u2013 och som korallerna beh\u00f6ver f\u00f6r att \u00f6verleva \u2013 skadas och till och med f\u00f6rst\u00f6rs.<\/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 ljusaste delarna \u00e4r koraller som har blekts<\/figcaption><\/figure>\n<p>Denna effekt kallas korallblekning och orsakas av den globala uppv\u00e4rmningen, som g\u00f6r att havsvattnet blir f\u00f6r varmt f\u00f6r algerna. Korallerna kan f\u00f6rbli blekta i ungef\u00e4r sex veckor. D\u00e4refter kan de \u00e5terh\u00e4mta sig, eller s\u00e5 kan de d\u00f6 helt, vilket \u00e4r mycket d\u00e5liga nyheter f\u00f6r alla v\u00e4xter och djur som lever i korallerna och \u00e4r beroende av dem f\u00f6r sin f\u00f6da.<\/p>\n<p>Dykare kan sj\u00e4lva unders\u00f6ka korallernas tillst\u00e5nd, men det tar l\u00e5ng tid och inneb\u00e4r att endast sm\u00e5 omr\u00e5den kan studeras. Genom att anv\u00e4nda ESA:s Sentinel-2-satelliter g\u00e5r det att \u00f6vervaka betydligt st\u00f6rre omr\u00e5den, vilket \u00e4r ett b\u00e4ttre s\u00e4tt att h\u00e5lla koll p\u00e5 hur friska korallerna \u00e4r.<\/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:s Sentinel-satelliter har \u00f6vervakat Stora barri\u00e4rrevet<\/figcaption><\/figure>\n<p>Det \u00e4r inte f\u00f6rsta g\u00e5ngen som satelliter anv\u00e4nds f\u00f6r att \u00f6vervaka korallrev som Stora barri\u00e4rrevet. Sentinel-2-satelliterna \u00e4r dock s\u00e4rskilt v\u00e4l l\u00e4mpade f\u00f6r detta uppdrag eftersom de tar bilder med mycket h\u00f6g uppl\u00f6sning och regelbundet passerar \u00f6ver omr\u00e5det, vilket g\u00f6r att de snabbt kan uppt\u00e4cka koraller som genomg\u00e5r blekning.<\/p>\n<p>ESA utvecklar nu ett nytt datorprogram som ska underl\u00e4tta en snabb och noggrann analys av satellitbilder av korallrev. Ju mer vi vet om korallblekning, desto b\u00e4ttre kan vi skydda dessa viktiga delar av v\u00e5r planet.<\/p>\n<p><b>Rolig fakta:<\/b> Forskare som studerar Stora Barri\u00e4rrevet har hittat j\u00e4tte musslor som \u00e4r \u00f6ver 120 \u00e5r gamla!<\/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\/sv\/wp-json\/wp\/v2\/posts\/434","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/comments?post=434"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/434\/revisions"}],"predecessor-version":[{"id":4470,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/434\/revisions\/4470"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=434"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=434"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=434"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=434"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=434"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=434"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=434"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=434"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=434"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=434"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}