{"id":1001,"date":"2004-12-03T10:28:00","date_gmt":"2004-12-03T09:28:00","guid":{"rendered":"https:\/\/kids.esa.int\/aerosols\/"},"modified":"2026-10-08T00:34:43","modified_gmt":"2026-10-07T22:34:43","slug":"aerosols","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/pt\/aerosols\/","title":{"rendered":"Aeross\u00f3is"},"content":{"rendered":"
\n

O ar est\u00e1 repleto de min\u00fasculas part\u00edculas de poeira e got\u00edculas em suspens\u00e3o \u2013 conhecidas como \u201caeross\u00f3is\u201d. Muitos aeross\u00f3is s\u00e3o produzidos pela natureza. Entre estes contam-se a areia das tempestades de poeira do deserto, as part\u00edculas de sal do oceano, os cristais de gelo e as cinzas provenientes de inc\u00eandios e erup\u00e7\u00f5es vulc\u00e2nicas.<\/p>\n<\/div>\n

As atividades humanas tamb\u00e9m est\u00e3o a aumentar a quantidade de aeross\u00f3is na atmosfera. Os aeross\u00f3is de fuligem preta e de di\u00f3xido de enxofre s\u00e3o emitidos pelas centrais el\u00e9tricas \u201cpoluentes\u201d e pelas chamin\u00e9s das f\u00e1bricas. Outros aeross\u00f3is s\u00e3o emitidos pelos gases de escape dos autom\u00f3veis e pelos motores dos avi\u00f5es.<\/p>\n

Os aeross\u00f3is s\u00e3o t\u00e3o pequenos que podem espalhar-se por todo o mundo. Podem causar asma e provocar chuva \u00e1cida, que mata peixes e \u00e1rvores. Tamb\u00e9m contribuem para as altera\u00e7\u00f5es clim\u00e1ticas, uma vez que absorvem e dispersam a luz solar. Os dados transmitidos pelos sat\u00e9lites est\u00e3o a ajudar os cientistas a estudar a propaga\u00e7\u00e3o dos aeross\u00f3is e o impacto que estes t\u00eam no planeta.<\/p>\n

Quatro instrumentos a bordo do Envisat, da ESA, s\u00e3o utilizados para mapear as concentra\u00e7\u00f5es de part\u00edculas de poeira e got\u00edculas de nuvens, desde o n\u00edvel do solo at\u00e9 uma altura de 100 km. Estes instrumentos conseguem detetar as nuvens de aeross\u00f3is e poluentes que cobrem as principais cidades industriais ou as florestas em chamas. Al\u00e9m disso, conseguem identificar os rastos de gases de escape deixados na atmosfera superior pelos avi\u00f5es de passageiros.<\/p>","protected":false},"excerpt":{"rendered":"

The air is full of tiny, floating dust particles and droplets – known as \u201caerosols\u201d. Many aerosols are produced by nature. These include sand from desert dust storms, salt particles […]<\/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\/2003\/07\/volcano_-_grey_with_smoke2\/17894314-2-eng-GB\/Volcano_-_grey_with_smoke.jpe","esa_banner_description":"","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/07\/Volcano_-_grey_with_smoke2","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":[64,42,10],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1001","post","type-post","status-publish","format-standard","hentry","category-climate-change","category-earth","category-learn","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/pt\/wp-json\/wp\/v2\/posts\/1001","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/pt\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/pt\/wp-json\/wp\/v2\/comments?post=1001"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/pt\/wp-json\/wp\/v2\/posts\/1001\/revisions"}],"predecessor-version":[{"id":2144,"href":"https:\/\/kids.esa.int\/pt\/wp-json\/wp\/v2\/posts\/1001\/revisions\/2144"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/pt\/wp-json\/wp\/v2\/media?parent=1001"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/pt\/wp-json\/wp\/v2\/categories?post=1001"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/pt\/wp-json\/wp\/v2\/tags?post=1001"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/pt\/wp-json\/wp\/v2\/panel?post=1001"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/pt\/wp-json\/wp\/v2\/language?post=1001"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/pt\/wp-json\/wp\/v2\/age?post=1001"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/pt\/wp-json\/wp\/v2\/duration?post=1001"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/pt\/wp-json\/wp\/v2\/resource_type?post=1001"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/pt\/wp-json\/wp\/v2\/audience?post=1001"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/pt\/wp-json\/wp\/v2\/wf_post_folders?post=1001"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}