{"id":1124,"date":"2004-12-03T10:09:00","date_gmt":"2004-12-03T09:09:00","guid":{"rendered":"https:\/\/kids.esa.int\/disappearing_forests\/"},"modified":"2026-10-08T00:36:16","modified_gmt":"2026-10-07T22:36:16","slug":"disappearing_forests","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/disappearing_forests\/","title":{"rendered":"Katoavat mets\u00e4t"},"content":{"rendered":"
\n

Mets\u00e4t peitt\u00e4v\u00e4t l\u00e4hes kolmanneksen maailman maapinta-alasta. Monet niist\u00e4 ovat niin laajoja, ett\u00e4 ainoa tapa kartoittaa ja tutkia niit\u00e4 on avaruudesta k\u00e4sin.<\/p>\n<\/div>\n

Mets\u00e4t eiv\u00e4t ole pelk\u00e4st\u00e4\u00e4n arvokkaita puun ja polttoaineen l\u00e4hteit\u00e4, vaan ne ovat my\u00f6s monien kasvi- ja el\u00e4inlajien elinymp\u00e4rist\u00f6.<\/p>\n

Puut est\u00e4v\u00e4t my\u00f6s tuulen ja sateen kuljettamasta maaper\u00e4\u00e4 pois, ne vaikuttavat paikalliseen ilmastoon ja hidastavat ilmastonmuutosta varastoimalla hiilt\u00e4.<\/p>\n

Valitettavasti mets\u00e4t kutistuvat nopeasti. Joka vuosi ihmisen toiminta tuhoaa valtavia alueita.<\/p>\n

Kun satelliitit lent\u00e4v\u00e4t yl\u00e4puolellamme, ne voivat saada yksityiskohtaisen kuvan koko mets\u00e4st\u00e4 muutamassa p\u00e4iv\u00e4ss\u00e4. Ne tarjoavat ainoan nopean ja helpon tavan kartoittaa alati muuttuvia metsi\u00e4 ja antaa s\u00e4\u00e4nn\u00f6llisesti ajantasaista tietoa niiden tilasta.<\/p>\n

\"Deforestation
Mets\u00e4kadon Rondoniassa, Brasiliassa<\/figcaption><\/figure>\n

ESAn ERS- ja Envisat-avaruusaluksissa on kuvantava tutka, joka n\u00e4kee pilvien l\u00e4pi ja paljastaa maanpinnan muutokset.<\/p>\n

N\u00e4kyv\u00e4n valon ja infrapunas\u00e4teilyn skanneria k\u00e4ytet\u00e4\u00e4n kasvien kasvun tutkimiseen ja pintal\u00e4mp\u00f6tilojen mittaamiseen. Se havaitsee my\u00f6s peltojen raivaamiseen k\u00e4ytetyt tulipalot.<\/p>\n

Satelliitit pystyv\u00e4t jopa tunnistamaan eri puulajit ja osoittamaan, kuinka terveit\u00e4 ne ovat.<\/p>\n

Satelliittikuvien pohjalta laaditut kartat auttavat johtajia ja paikallisviranomaisia suojelemaan ja s\u00e4ilytt\u00e4m\u00e4\u00e4n kutistuvia metsi\u00e4.<\/p>","protected":false},"excerpt":{"rendered":"

Forests cover almost a third of world’s land surface. Many of them are so vast that the only way to map and study them is from space. Forests are not […]<\/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\/2004\/12\/deforastation_012\/17890539-2-eng-GB\/deforastation_01.jpg","esa_banner_description":"","esa_banner_credit":"AP Photo\/Lynne Slandky","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2004\/12\/deforastation_012","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":[42,10,43],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1124","post","type-post","status-publish","format-standard","hentry","category-earth","category-learn","category-protecting-earth","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/1124","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=1124"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/1124\/revisions"}],"predecessor-version":[{"id":4860,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/1124\/revisions\/4860"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=1124"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=1124"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=1124"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=1124"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=1124"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=1124"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=1124"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=1124"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=1124"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=1124"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}