{"id":648,"date":"2012-12-05T13:13:00","date_gmt":"2012-12-05T12:13:00","guid":{"rendered":"https:\/\/kids.esa.int\/snow_cover_hits_record_lows\/"},"modified":"2026-10-08T00:30:41","modified_gmt":"2026-10-07T22:30:41","slug":"snow_cover_hits_record_lows","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/snow_cover_hits_record_lows\/","title":{"rendered":"Lumipeite on enn\u00e4tyksellisen ohut"},"content":{"rendered":"<div class=\"lede\">\n<p>Tarvitseeko Joulupukki jonain p\u00e4iv\u00e4n\u00e4 py\u00f6r\u00e4t rekeens\u00e4? Siihen on viel\u00e4 pitk\u00e4 matka, mutta satelliittihavainnot osoittavat, ett\u00e4 pohjoisella pallonpuoliskolla lumen m\u00e4\u00e4r\u00e4 v\u00e4henee tasaisesti.<\/p>\n<\/div>\n<p>Uusi analyysi satelliittien, kuten ESA:n Envisatin, havaitsemasta lumipeitteest\u00e4 osoittaa, ett\u00e4 Euroopassa ja Aasiassa on vuodesta 2008 l\u00e4htien joka kes\u00e4kuu mitattu enn\u00e4tyksellisen v\u00e4h\u00e4ist\u00e4 lumipeitett\u00e4. My\u00f6s kolmena viimeisen viiden vuoden aikana Pohjois-Amerikan kes\u00e4isin on mitattu enn\u00e4tyksellisen v\u00e4h\u00e4ist\u00e4 lumipeitett\u00e4. T\u00e4m\u00e4 tarkoittaa, ett\u00e4 kes\u00e4kuussa lumen peitt\u00e4m\u00e4 alue on nyt pienin sitten satelliittihavaintojen alkamisen noin 45 vuotta sitten.<\/p>\n<figure class=\"wp-block-image size-natural\" data-width=\"400\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/09\/Snowfall2\" 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\/2003\/09\/snowfall2\/17906532-2-eng-GB\/Snowfall.jpeg\" alt=\"Snowfall\"><\/figure>\n<p>Kes\u00e4kuun lumipeitteen on havaittu v\u00e4henev\u00e4n paljon odotettua nopeammin ilmastomallien ennusteiden perusteella, ja lumi katoaa jopa nopeammin kuin arktisen alueen kes\u00e4inen merij\u00e4\u00e4. Satelliittitutkimusten tulokset osoittavat my\u00f6s, ett\u00e4 pohjoisen pallonpuoliskon lumipeitteen enimm\u00e4ispaksuus on hitaasti v\u00e4henem\u00e4ss\u00e4, kun taas kev\u00e4islumi \u2013 etenkin pohjoisnavan suuntaan \u2013 sulaa aiemmin.<\/p>\n<p>Onko sill\u00e4 merkityst\u00e4, jos lunta on v\u00e4hemm\u00e4n ja se sulaa nopeammin? Lumimassan ja -pinta-alan muutoksilla on valtava vaikutus j\u00e4\u00e4tik\u00f6iden, jokien ja maaper\u00e4n vesim\u00e4\u00e4riin. Ne liittyv\u00e4t my\u00f6s pitk\u00e4n aikav\u00e4lin ilmastonmuutoksiin.<\/p>\n<p>Ehk\u00e4p\u00e4 Joulupukki ei ole ainoa, jonka on tulevaisuudessa muutettava el\u00e4m\u00e4ntapaansa\u2026<\/p>","protected":false},"excerpt":{"rendered":"<p>Will Santa Claus one day need wheels for his sleigh? That is still a long way off, but satellite observations are showing a steady decrease in the amount of snow [&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\/2012\/06\/how_much_freshwater_is_held_in_snow2\/17894277-2-eng-GB\/How_much_freshwater_is_held_in_snow.jpg","esa_banner_description":"","esa_banner_credit":"S. 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