{"id":21156,"date":"2011-09-01T23:22:26","date_gmt":"2011-09-01T23:22:26","guid":{"rendered":"https:\/\/www.institutodeengenharia.org.br\/?p=21156"},"modified":"2011-09-01T14:40:22","modified_gmt":"2011-09-01T14:40:22","slug":"cientistas-usam-laser-para-criar-chuva","status":"publish","type":"post","link":"https:\/\/www.institutodeengenharia.org.br\/site\/2011\/09\/01\/cientistas-usam-laser-para-criar-chuva\/","title":{"rendered":"Cientistas usam laser para criar chuva"},"content":{"rendered":"<p>Em um experimento realizado entre 2009 e 2010, eles demonstraram a utiliza\u00e7\u00e3o do laser para promover a forma\u00e7\u00e3o de got\u00edculas de \u00e1gua e evitar que elas tornassem a evaporar. <\/p>\n<p>Not\u00edcias relacionadasBrit\u00e2nicos fotografam beleza das nuvens no ver\u00e3oBrit\u00e2nico corre o mundo para fotografar tempestadesConsumo de carv\u00e3o na China &#039;suspendeu&#039; aquecimento global, diz estudoT\u00f3picos relacionadosCi\u00eanciaA pesquisa, publicada pela revista cient\u00edfica online Nature Communications, afirma que o laser poderia ser usado como alternativa para outros m\u00e9todos testados nos \u00faltimos 70 anos, como o bombardeamento de part\u00edculas de gelo seco ou de sais na atmosfera. <\/p>\n<p>Os pesquisadores observam, por\u00e9m, que a efici\u00eancia dos m\u00e9todos usados at\u00e9 hoje &#8220;ainda s\u00e3o objeto de debate&#8221;. <\/p>\n<p>Umidade alta <\/p>\n<p>Segundo os autores do estudo, os feixes de laser podem ser usados para induzir a condensa\u00e7\u00e3o e o crescimento das goticulas de \u00e1gua na atmosfera desde que a umidade relativa do ar seja superior a 70%. <\/p>\n<p>O estudo foi realizado em um local \u00e0s margens do rio Reno, perto de Genebra, para se beneficiar, segundo os pesquisadores, do fluxo de ar mais quente proveniente do lago Genebra para gerar as condi\u00e7\u00f5es ideais para a pesquisa. <\/p>\n<p>Os autores afirmam que o laser ajudou a criar no ar part\u00edculas de \u00e1cido n\u00edtrico, que atuaram como uma esp\u00e9cie de agregador das part\u00edculas de \u00e1gua para gerar got\u00edculas microsc\u00f3picas, com tamanho de algumas micras de di\u00e2metro (cada micra \u00e9 equivalente a 0,001 mil\u00edmetro). <\/p>\n<p>Na experi\u00eancia, realizada ao longo de 133 horas em um ambiente fechado, as got\u00edculas de \u00e1gua geradas n\u00e3o foram suficientemente grandes para se precipitarem em forma de chuva, mas os autores do estudo acreditam que seria poss\u00edvel intensificar a irradia\u00e7\u00e3o dos feixes de laser para aumentar ainda mais o tamanho das got\u00edculas <\/p>\n<p><b>Autor: BBC<\/b><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pesquisadores su\u00ed\u00e7os e alem\u00e3es dizem ter descoberto uma maneira de utilizar feixes de raio laser para induzir chuvas<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,35],"tags":[],"class_list":{"0":"post-21156","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-noticias","7":"category-pesquisa-e-desenvolvimento"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - 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