{"id":542,"date":"2004-12-03T09:35:00","date_gmt":"2004-12-03T08:35:00","guid":{"rendered":"https:\/\/kids.esa.int\/oceans\/"},"modified":"2026-10-08T00:29:26","modified_gmt":"2026-10-07T22:29:26","slug":"oceans","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/oceans\/","title":{"rendered":"Meret"},"content":{"rendered":"<div class=\"lede\">\n<p>Maa on ainoa tuntemamme planeetta, jonka pinnalla on nestem\u00e4ist\u00e4 vett\u00e4. Meret peitt\u00e4v\u00e4t seitsem\u00e4n kymmenesosaa planeetan pinnasta. Silti ne ovat monin tavoin edelleen mysteeri.<\/p>\n<\/div>\n<p>Merill\u00e4 on merkitt\u00e4v\u00e4 vaikutus s\u00e4\u00e4h\u00e4n ja ilmakeh\u00e4\u00e4n. Ne toimivat talvella l\u00e4mp\u00f6varastoina ja kes\u00e4ll\u00e4 ilmastointilaitteina.<\/p>\n<p>Merivirrat toimivat kuin valtavat kuljetushihnat, jotka kuljettavat l\u00e4mp\u00f6\u00e4 p\u00e4iv\u00e4ntasaajalta kohti napoja. L\u00e4nsi-Eurooppa olisi talvella yht\u00e4 kylm\u00e4 kuin Kanada, jos Golfvirta katoaisi.<\/p>\n<p>Meriss\u00e4 on enemm\u00e4n el\u00e4m\u00e4\u00e4 kuin miss\u00e4\u00e4n muualla maapallolla. Jopa plankton, meren pienimm\u00e4t eli\u00f6t, sitoo valtavia m\u00e4\u00e4ri\u00e4 hiilidioksidia. \u00d6ljyn ja myrkyllisten j\u00e4tteiden mereen laskeminen on kuitenkin suuri ongelma.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"800\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2004\/07\/Atlantic_ocean_seen_by_Envisat_s_AATSR2\" 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\/2004\/07\/atlantic_ocean_seen_by_envisat_s_aatsr2\/17903677-2-eng-GB\/Atlantic_ocean_seen_by_Envisat_s_AATSR.jpg\" alt=\"Atlantic ocean seen by Envisat&#x27;s AATSR\"><figcaption>Envisatin AATSR-satelliitin kuvaama Atlantin valtameri<\/figcaption><\/figure>\n<p>Satelliitit sopivat erinomaisesti valtavien merien tutkimiseen ja kartoittamiseen. Avaruudesta k\u00e4sin toimiva tutka pystyy havaitsemaan meress\u00e4 olevat \u201ckukkulat\u201d ja \u201claaksot\u201d. Lis\u00e4ksi se paljastaa aaltojen koon, tuulen nopeuden ja tuulen suunnan. Alukset hy\u00f6tyv\u00e4t suuresti kuvista, jotka esitt\u00e4v\u00e4t myrskyj\u00e4, vaarallisia j\u00e4\u00e4vuoria ja talvella esiintyvi\u00e4 merij\u00e4\u00e4peitteit\u00e4.<\/p>","protected":false},"excerpt":{"rendered":"<p>Earth is the only world we know that has liquid water on its surface. Oceans cover seven tenths of the planet&#8217;s surface. Yet, in many ways, they remain a mystery. [&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\/2002\/02\/ocean_real2\/17863603-3-eng-GB\/Ocean_real.jpg","esa_banner_description":"","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2002\/02\/Ocean_real2","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-542","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\/fi\/wp-json\/wp\/v2\/posts\/542","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/comments?post=542"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/542\/revisions"}],"predecessor-version":[{"id":4538,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/542\/revisions\/4538"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=542"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=542"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=542"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=542"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=542"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=542"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=542"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=542"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=542"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=542"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}