{"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\/sv\/killer_storm_tracked_from_space\/","title":{"rendered":"En f\u00f6r\u00f6dande storm f\u00f6ljdes fr\u00e5n rymden"},"content":{"rendered":"
\n

Orkaner \u00e4r de mest imponerande stormarna p\u00e5 jorden. De bildas \u00f6ver de varma vattnen i den tropiska delen av Atlanten, och de enorma virvlarna r\u00f6r sig v\u00e4sterut och l\u00e4mnar ett sp\u00e5r av f\u00f6r\u00f6delse efter sig. Den kraftigaste orkanen hittills i \u00e5r har varit orkanen Dean, som slog till mot Mexiko efter att ha dragit fram \u00f6ver \u00f6arna i Karibien. ESA:s satelliter f\u00f6ljde Dean medan dess vindar p\u00e5 260 km\/h skapade enorma v\u00e5gor och j\u00e4mnade byggnader med marken. Minst \u00e5tta m\u00e4nniskor omkom.<\/p>\n<\/div>\n

Att k\u00e4nna till orkanernas styrka och bana \u00e4r avg\u00f6rande f\u00f6r att kunna utf\u00e4rda f\u00f6rvarningar. Lyckligtvis g\u00f6r satelliter som ESA:s Envisat och ERS-2 det nu enklare att studera dessa of\u00f6ruts\u00e4gbara stormar. Deras optiska instrument och radarinstrument kan \u00f6vervaka f\u00f6r\u00e4ndringar i molnstruktur, vindar och v\u00e5gor, havsytans temperatur och havsytans h\u00f6jd.<\/p>\n

Optiska instrument p\u00e5 Envisat visar de virvlande molntopparna, medan radarn ser igenom molnen och visar hur vindarna piskar upp havsv\u00e5gorna. Radarimpulser fr\u00e5n h\u00f6jdm\u00e4taren m\u00e4ter havsytans h\u00f6jd med en noggrannhet p\u00e5 n\u00e5gra centimeter. Radarscatterometern p\u00e5 ERS-2 \u00e4r s\u00e4rskilt v\u00e4rdefull eftersom dess resultat n\u00e4stan inte p\u00e5verkas av kraftigt regn. Den kan leverera data om vindens hastighet och riktning \u00f6ver havsytan \u00e4nda in i hj\u00e4rtat av de v\u00e5ldsammaste stormarna.<\/p>\n

Eftersom orkaner livn\u00e4r sig p\u00e5 varm, fuktig luft \u00e4r information om havstemperaturen s\u00e4rskilt viktig f\u00f6r prognosmakarna. Ett av instrumenten ombord p\u00e5 Envisat \u00e4r en rymdbaserad termometer som m\u00e4ter havsytans temperatur med en noggrannhet p\u00e5 en br\u00e5kdel av en grad. Medan Dean avtar \u00e4r ESA:s \u00f6gon i rymden redan i beredskap inf\u00f6r n\u00e4sta f\u00f6r\u00f6dande 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\/sv\/wp-json\/wp\/v2\/posts\/890","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=890"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/890\/revisions"}],"predecessor-version":[{"id":2033,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/890\/revisions\/2033"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=890"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=890"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=890"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=890"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=890"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=890"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=890"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=890"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=890"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=890"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}