{"id":15737,"date":"2022-10-11T11:56:07","date_gmt":"2022-10-11T09:56:07","guid":{"rendered":"https:\/\/congopubonline.com\/?p=15737"},"modified":"2022-10-11T11:56:10","modified_gmt":"2022-10-11T09:56:10","slug":"previsions-volcanologiques","status":"publish","type":"post","link":"https:\/\/congopubonline.com\/?p=15737","title":{"rendered":"Pr\u00e9visions volcanologiques"},"content":{"rendered":"\n<p><strong>Il peut \u00eatre difficile de pr\u00e9dire les \u00e9ruptions volcaniques. Le magma sous un volcan contient des gaz dissous, notamment du dioxyde de carbone, qui s&rsquo;\u00e9chappent \u00e0 la surface et peuvent \u00eatre analys\u00e9s avant, pendant et apr\u00e8s une \u00e9ruption en\u00a0vue\u00a0d&rsquo;y rep\u00e9rer des indices quant \u00e0 une prochaine \u00e9ruption.<\/strong><\/p>\n\n\n\n<p>Il peut toutefois \u00eatre dangereux de s&rsquo;aventurer dans le\u00a0crat\u00e8re\u00a0bouillonnant d&rsquo;un\u00a0volcan\u00a0afin d&rsquo;en \u00e9valuer la teneur en\u00a0dioxyde de carbone. Le Groupe de\u00a0recherche\u00a0sur la\u00a0volcanologie\u00a0de l&rsquo;Universit\u00e9 McGill\u00a0a fait \u00e9quipe avec des chercheurs au Costa Rica et,\u00a0ensemble, ils sont parvenus \u00e0 recueillir des \u00e9chantillons de dioxyde de\u00a0carbone\u00a0volcanique \u00e0 l&rsquo;aide de drones &#8211; entreprise que tr\u00e8s peu avaient r\u00e9ussie avant eux.<\/p>\n\n\n\n<p>Les chercheurs ont envoy\u00e9 des drones dans le crat\u00e8re de Po\u00e1s, un volcan actif au Costa Rica. Ils ont mesur\u00e9 la teneur en dioxyde de carbone des \u00e9chantillons de\u00a0gaz\u00a0recueillis afin de suivre le niveau d&rsquo;activit\u00e9\u00a0du volcan. Quelques braves membres de l&rsquo;\u00e9quipe sont aussi descendus dans le crat\u00e8re pour pr\u00e9lever des \u00e9chantillons au sol et ainsi valider les r\u00e9sultats produits par les drones. Les sch\u00e9mas particuliers des isotopes de carbones ont r\u00e9v\u00e9l\u00e9 qu&rsquo;un changement chimique s&rsquo;\u00e9tait op\u00e9r\u00e9 dans les gaz de dioxyde de carbone du volcan imm\u00e9diatement avant une \u00e9ruption importante, en 2017.<\/p>\n\n\n\n<p>\u00ab\u00a0Les drones peuvent \u00eatre utiles pour la surveillance des volcans et pour les pr\u00e9visions volcanologiques puisqu&rsquo;ils nous donnent facilement acc\u00e8s aux gaz \u00e0 l&rsquo;int\u00e9rieur des volcans,\u00a0\u00bb, indique Fiona D&rsquo;Arcy, auteure principale et doctorante au D\u00e9partement des sciences de la\u00a0Terre\u00a0et des plan\u00e8tes. \u00ab\u00a0La s\u00e9curit\u00e9 est l&rsquo;\u00e9l\u00e9ment le plus important \u00e0 consid\u00e9rer ici: celle des populations qui vivent aux alentours du volcan et celle des chercheurs, et la s\u00e9curit\u00e9 en\u00a0mati\u00e8re\u00a0de vol en zone naturelle et en zone touristique.\u00a0\u00bb<\/p>\n\n\n\n<p>L&rsquo;article \u00ab\u00a0New Insights into carbon isotopic systematics of Po\u00e1s volcano, Costa Rica\u00a0\u00bb, par Fiona D&rsquo;Arcy, John Stix et coll., a \u00e9t\u00e9 publi\u00e9 dans le Journal of Volcanology and Geothermal Research.<\/p>\n\n\n\n<p><strong>Techno-Science.net via CONGO PUB Online<\/strong><\/p>\n<div class='epvc-post-count'><span class='epvc-eye'><\/span>  <span class=\"epvc-count\"> 395<\/span><span class='epvc-label'> Vues<\/span><\/div>","protected":false},"excerpt":{"rendered":"<p>Il peut \u00eatre difficile de pr\u00e9dire les \u00e9ruptions volcaniques. Le magma sous un volcan contient des gaz dissous, notamment du dioxyde de carbone, qui s&rsquo;\u00e9chappent \u00e0 la surface et peuvent&hellip;<\/p>\n","protected":false},"author":1,"featured_media":15738,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"content-type":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[61],"tags":[],"class_list":["post-15737","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sci-et-tech"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.4 (Yoast SEO v25.4) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Pr\u00e9visions volcanologiques - Congo Pub Online<\/title>\n<meta name=\"description\" content=\"Pr\u00e9visions volcanologiques Science et Technologie\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/congopubonline.com\/?p=15737\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pr\u00e9visions volcanologiques\" \/>\n<meta property=\"og:description\" content=\"Pr\u00e9visions volcanologiques Science et Technologie\" \/>\n<meta property=\"og:url\" content=\"https:\/\/congopubonline.com\/?p=15737\" \/>\n<meta property=\"og:site_name\" content=\"Congo Pub Online\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/web.facebook.com\/Congopubonline\" \/>\n<meta property=\"article:published_time\" content=\"2022-10-11T09:56:07+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-10-11T09:56:10+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/congopubonline.com\/wp-content\/uploads\/2022\/10\/volcan.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"683\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"admin9775\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@CONGOPUBOnline\" \/>\n<meta name=\"twitter:site\" content=\"@CONGOPUBOnline\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin9775\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/congopubonline.com\/?p=15737#article\",\"isPartOf\":{\"@id\":\"https:\/\/congopubonline.com\/?p=15737\"},\"author\":{\"name\":\"admin9775\",\"@id\":\"https:\/\/congopubonline.com\/#\/schema\/person\/d2f3a940be2e9c1a0e4f8831e203f3cc\"},\"headline\":\"Pr\u00e9visions volcanologiques\",\"datePublished\":\"2022-10-11T09:56:07+00:00\",\"dateModified\":\"2022-10-11T09:56:10+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/congopubonline.com\/?p=15737\"},\"wordCount\":369,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/congopubonline.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/congopubonline.com\/?p=15737#primaryimage\"},\"thumbnailUrl\":\"https:\/\/congopubonline.com\/wp-content\/uploads\/2022\/10\/volcan.webp\",\"articleSection\":[\"Science et Technologie\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/congopubonline.com\/?p=15737#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/congopubonline.com\/?p=15737\",\"url\":\"https:\/\/congopubonline.com\/?p=15737\",\"name\":\"Pr\u00e9visions volcanologiques - 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