{"id":890,"date":"2007-08-27T09:08:00","date_gmt":"2007-08-27T07:08:00","guid":{"rendered":"https:\/\/kids.esa.int\/killer_storm_tracked_from_space\/"},"modified":"2026-10-08T00:33:26","modified_gmt":"2026-10-07T22:33:26","slug":"killer_storm_tracked_from_space","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/killer_storm_tracked_from_space\/","title":{"rendered":"D\u00f8dbringende storm overv\u00e5get fra rummet"},"content":{"rendered":"
\n

Orkaner er de mest imponerende storme p\u00e5 Jorden. De opst\u00e5r over det varme vand i det tropiske Atlanterhav, og de enorme hvirvler bev\u00e6ger sig mod vest og efterlader et spor af \u00f8del\u00e6ggelse. Den hidtil kraftigste orkan i \u00e5r har v\u00e6ret orkanen Dean, som ramte Mexico med fuld styrke, efter at den havde h\u00e6rget de caribiske \u00f8er. ESA\u2019s satellitter fulgte Dean, mens dens vindst\u00f8d p\u00e5 260 km\/t skabte k\u00e6mpe b\u00f8lger og j\u00e6vnede bygninger med jorden. Mindst otte mennesker omkom.<\/p>\n<\/div>\n

Det er afg\u00f8rende at kende orkanernes styrke og bane for at kunne udsende advarsler i god tid. Heldigvis g\u00f8r satellitter som ESAs Envisat og ERS-2 det nu lettere at unders\u00f8ge disse uforudsigelige storme. Deres optiske og radarbaserede instrumenter kan overv\u00e5ge \u00e6ndringer i skystruktur, vind og b\u00f8lger, havoverfladetemperatur og havoverfladeh\u00f8jde.<\/p>\n

Optiske instrumenter p\u00e5 Envisat viser de hvirvlende skytopper, mens radaren ser igennem skyerne og viser, hvordan vinden pisker havb\u00f8lgerne op. Radarimpulser fra h\u00f8jdem\u00e5leren m\u00e5ler havoverfladens h\u00f8jde med en n\u00f8jagtighed p\u00e5 f\u00e5 centimeter. Radarscatterometeret p\u00e5 ERS-2 er s\u00e6rligt v\u00e6rdifuldt, da dets resultater n\u00e6sten ikke p\u00e5virkes af kraftig regn. Det kan levere data om vindens hastighed og retning over havoverfladen lige fra hjertet af de voldsomste storme.<\/p>\n

Da orkaner lever af varm, fugtig luft, er oplysninger om havtemperaturen af s\u00e6rlig betydning for meteorologerne. Et af instrumenterne ombord p\u00e5 Envisat er et rumbaseret termometer, der m\u00e5ler havoverfladetemperaturen med en n\u00f8jagtighed p\u00e5 en br\u00f8kdel af en grad. Mens Dean er ved at ebbe ud, er ESA\u2019s \u00f8jne i himlen allerede p\u00e5 vagt over for den n\u00e6ste voldsomme storm.<\/p>","protected":false},"excerpt":{"rendered":"

Hurricanes are the most awesome storms on Earth. Developing over the warm waters of the tropical Atlantic Ocean, the huge spirals drive westward, leaving a trail of destruction. The most […]<\/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\/2007\/08\/dean_leaving_martinique2\/17874556-2-eng-GB\/Dean_leaving_Martinique.jpg","esa_banner_description":"Dean leaving Martinique","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2007\/08\/Dean_leaving_Martinique2","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":[42,10,59],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-890","post","type-post","status-publish","format-standard","hentry","category-earth","category-learn","category-natural-disasters"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/890","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=890"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/890\/revisions"}],"predecessor-version":[{"id":2033,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/890\/revisions\/2033"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=890"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=890"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=890"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=890"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=890"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=890"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=890"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=890"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=890"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=890"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}