{"id":84548,"date":"2024-04-13T14:40:16","date_gmt":"2024-04-13T14:40:16","guid":{"rendered":"https:\/\/www.africa-press.net\/burkina-faso\/politique\/meteo-au-coeur-des-nuages"},"modified":"2024-04-13T14:50:08","modified_gmt":"2024-04-13T14:50:08","slug":"meteo-au-coeur-des-nuages","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages","title":{"rendered":"M\u00e9t\u00e9o : au c\u0153ur des nuages"},"content":{"rendered":"

Africa-Press – Burkina Faso. <\/strong><\/span> Des ae\u0301rosols pour constituer le noyau dur des ne\u0301bulosite\u0301s<\/b><\/p>\n

A\u0300 l’e\u0301cole, on enseigne que les nuages se forment lors des mouvements de masses d’air. Leur naissance est avant tout une histoire de condensation, c’est-a\u0300-dire de transformation de vapeur d’eau en gouttelettes liquides en suspension dans l’air. De\u0301sormais, la recherche regarde aussi ces processus a\u0300 l’e\u0301chelle microscopique. Car pour ge\u0301ne\u0301rer la condensation et cre\u0301er les gouttelettes, il faut un support. Les scientifiques les nomment particules d’ae\u0301rosols.<\/p>\n

La taille et la nature de ces ae\u0301rosols varient. Le plus souvent d’origine naturelle, comme les sels de mer ou des compose\u0301s organiques e\u0301mis par la ve\u0301ge\u0301tation, ils peuvent me\u0302me e\u0302tre vivants comme des bacte\u0301ries, des microalgues, des pollens… Ils sont aussi produits par l’activite\u0301 humaine, comme les poussie\u0300res e\u0301mises par les usines ou les feux de chemine\u0301e, particules issues de la circulation automobile. Lorsque les ae\u0301rosols proviennent du sol, ils sont dits primaires. Cre\u0301e\u0301s directement dans l’air, par oxydation sous l’effet des rayonnements solaire et infrarouge, ils sont qualifie\u0301s de secondaires.<\/p>\n

En fonction de la composition chimique des ae\u0301rosols, un nuage peut avoir diffe\u0301rentes proprie\u0301te\u0301s. Les nuages riches en ae\u0301rosols issus de la pollution sont par exemple particulie\u0300rement brillants. Car ces particules forment des gouttelettes plus nombreuses et petites que les particules naturelles. La re\u0301flexion de la lumie\u0300re y est plus forte. Les sels de mer, eux, facilitent la production de pluie. Et les poussie\u0300res de combustion semblent plus fre\u0301quentes dans les nuages de gre\u0302le.<\/p>\n

Pour e\u0301tudier ces phe\u0301nome\u0300nes, les me\u0301te\u0301orologues disposent d’un aspirateur a\u0300 nuages, ou collecteur d’eaux atmosphe\u0301riques: un dispositif de recherche unique au monde installe\u0301 au sommet du puy de Do\u0302me (1465 m). L’appareil capte les nuages de la troposphe\u0300re libre, une partie de l’atmosphe\u0300re qui permet le transport de masses d’air sur de grandes distances, au-dessus de la couche d’air qui rec\u0327oit les e\u0301missions locales, provenant de la surface. On y trouve les traces de compose\u0301s provenant de l’autre bout du globe, par exemple les me\u0301gafeux ayant ravage\u0301 les fore\u0302ts du Canada l’e\u0301te\u0301 dernier.<\/p>\n

De la pluie a\u0300 volonte\u0301 ?<\/b><\/p>\n

Avec la mai\u0302trise des me\u0301canismes mole\u0301culaires implique\u0301s dans la condensation des nuages revient un ancien re\u0302ve: savoir faire tomber la pluie. L’ensemencement des nuages consiste a\u0300 envoyer dans l’atmosphe\u0300re un produit, iodure d’argent, sels de sodium ou cristaux de glace, afin qu’il constitue des noyaux de condensation.<\/p>\n

On peut ainsi \u00ab\u00a0re\u0301colter\u00a0\u00bb l’humidite\u0301 d’une masse d’air, faire pleuvoir chez soi pluto\u0302t que chez son voisin… Le tout avec une efficacite\u0301 toute relative: d’apre\u0300s un rapport de l’OMM, 0 a\u0300 20 % selon les conditions et les techniques. Le proce\u0301de\u0301 n’est soumis a\u0300 aucune re\u0301glementation. En France, certains vignobles l’emploient afin de re\u0301duire les de\u0301ga\u0302ts lie\u0301s a\u0300 la gre\u0302le.<\/p>\n

Reste que la toxicite\u0301 des produits envoye\u0301s dans l’atmosphe\u0300re doit e\u0302tre surveille\u0301e… L’iodure d’argent est par exemple soupc\u0327onne\u0301 d’affecter les e\u0301cosyste\u0300mes terrestres et aquatiques.<\/p>\n

Et avec le re\u0301chauffement ?<\/b><\/p>\n

\u00ab\u00a0Les nuages ont un effet ambivalent sur le climat, pre\u0301cise Laurent Deguillaume, du Laboratoire de me\u0301te\u0301orologie physique a\u0300 Aubie\u0300re (Puy-de-Do\u0302me). En bloquant la radiation solaire, ils abaissent la tempe\u0301rature terrestre. Mais ils retiennent aussi les rayons infrarouges – chauds – e\u0301mis par le sol. \u00a0\u00bb Comprendre leur effet global est un de\u0301fi pour la recherche. Me\u0302me les mode\u0300les climatiques les plus puissants s’y perdent. Ceux utilise\u0301s par le Giec ont une re\u0301solution de plusieurs kilome\u0300tres, bien trop grande pour simuler correctement les nuages. Les ge\u0301ants blancs restent de grands inconnus du changement climatique.<\/p>\n

Pour plus d’informations et d’analyses sur la Burkina Faso<\/a>, suivez Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – Burkina Faso. Des ae\u0301rosols pour constituer le noyau dur des ne\u0301bulosite\u0301s A\u0300 l’e\u0301cole, on enseigne que les nuages se forment lors des mouvements de masses d’air. Leur naissance est avant tout une histoire de condensation, c’est-a\u0300-dire de transformation de vapeur d’eau en gouttelettes liquides en suspension dans l’air. De\u0301sormais, la recherche regarde aussi […]<\/p>\n","protected":false},"author":82,"featured_media":84547,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[111,725,29],"class_list":["post-84548","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-burkina-faso","tag-burkina-faso"],"yoast_head":"\nM\u00e9t\u00e9o : au c\u0153ur des nuages - Burkina Faso<\/title>\n<meta name=\"description\" content=\"Des ae\u0301rosols pour constituer le noyau dur des ne\u0301bulosite\u0301s A\u0300 l'e\u0301cole, on enseigne que les nuages se forment ...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"M\u00e9t\u00e9o : au c\u0153ur des nuages\" \/>\n<meta property=\"og:description\" content=\"Des ae\u0301rosols pour constituer le noyau dur des ne\u0301bulosite\u0301s A\u0300 l'e\u0301cole, on enseigne que les nuages se forment ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages\" \/>\n<meta property=\"og:site_name\" content=\"Burkina Faso\" \/>\n<meta property=\"article:published_time\" content=\"2024-04-13T14:40:16+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-13T14:50:08+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/burkina\/sites\/42\/2024\/04\/sm_1713007060.629894.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"M\u00e9t\u00e9o : au c\u0153ur des nuages\",\"datePublished\":\"2024-04-13T14:40:16+00:00\",\"dateModified\":\"2024-04-13T14:50:08+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages\"},\"wordCount\":712,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/burkina\/sites\/42\/2024\/04\/sm_1713007060.629894.jpg\",\"keywords\":[\"Africa Press\",\"Africa Press-Burkina Faso\",\"Burkina Faso\"],\"articleSection\":[\"Divers\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages\",\"url\":\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages\",\"name\":\"M\u00e9t\u00e9o : au c\u0153ur des nuages - Burkina Faso\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/burkina\/sites\/42\/2024\/04\/sm_1713007060.629894.jpg\",\"datePublished\":\"2024-04-13T14:40:16+00:00\",\"dateModified\":\"2024-04-13T14:50:08+00:00\",\"author\":{\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"description\":\"Des ae\u0301rosols pour constituer le noyau dur des ne\u0301bulosite\u0301s A\u0300 l'e\u0301cole, on enseigne que les nuages se forment ...\",\"breadcrumb\":{\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages#primaryimage\",\"url\":\"https:\/\/static.africa-press.net\/burkina\/sites\/42\/2024\/04\/sm_1713007060.629894.jpg\",\"contentUrl\":\"https:\/\/static.africa-press.net\/burkina\/sites\/42\/2024\/04\/sm_1713007060.629894.jpg\",\"width\":1200,\"height\":900,\"caption\":\"M\u00e9t\u00e9o : au c\u0153ur des nuages\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\/\/www.africa-press.net\/burkina-faso\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"M\u00e9t\u00e9o : au c\u0153ur des nuages\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/#website\",\"url\":\"https:\/\/www.africa-press.net\/burkina-faso\/\",\"name\":\"Burkina Faso\",\"description\":\"Just another Africa News Agency Sites site\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.africa-press.net\/burkina-faso\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\",\"name\":\"cfeditorfr\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"M\u00e9t\u00e9o : au c\u0153ur des nuages - Burkina Faso","description":"Des ae\u0301rosols pour constituer le noyau dur des ne\u0301bulosite\u0301s A\u0300 l'e\u0301cole, on enseigne que les nuages se forment ...","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages","og_locale":"fr_FR","og_type":"article","og_title":"M\u00e9t\u00e9o : au c\u0153ur des nuages","og_description":"Des ae\u0301rosols pour constituer le noyau dur des ne\u0301bulosite\u0301s A\u0300 l'e\u0301cole, on enseigne que les nuages se forment ...","og_url":"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages","og_site_name":"Burkina Faso","article_published_time":"2024-04-13T14:40:16+00:00","article_modified_time":"2024-04-13T14:50:08+00:00","og_image":[{"width":1200,"height":900,"url":"https:\/\/static.africa-press.net\/burkina\/sites\/42\/2024\/04\/sm_1713007060.629894.jpg","type":"image\/jpeg"}],"author":"cfeditorfr","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"cfeditorfr","Dur\u00e9e de lecture estim\u00e9e":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages#article","isPartOf":{"@id":"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages"},"author":{"name":"cfeditorfr","@id":"https:\/\/www.africa-press.net\/burkina-faso\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1"},"headline":"M\u00e9t\u00e9o : au c\u0153ur des nuages","datePublished":"2024-04-13T14:40:16+00:00","dateModified":"2024-04-13T14:50:08+00:00","mainEntityOfPage":{"@id":"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages"},"wordCount":712,"commentCount":0,"image":{"@id":"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages#primaryimage"},"thumbnailUrl":"https:\/\/static.africa-press.net\/burkina\/sites\/42\/2024\/04\/sm_1713007060.629894.jpg","keywords":["Africa Press","Africa Press-Burkina Faso","Burkina Faso"],"articleSection":["Divers","Toutes les actualit\u00e9s"],"inLanguage":"fr-FR","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages","url":"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages","name":"M\u00e9t\u00e9o : au c\u0153ur des nuages - Burkina Faso","isPartOf":{"@id":"https:\/\/www.africa-press.net\/burkina-faso\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages#primaryimage"},"image":{"@id":"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages#primaryimage"},"thumbnailUrl":"https:\/\/static.africa-press.net\/burkina\/sites\/42\/2024\/04\/sm_1713007060.629894.jpg","datePublished":"2024-04-13T14:40:16+00:00","dateModified":"2024-04-13T14:50:08+00:00","author":{"@id":"https:\/\/www.africa-press.net\/burkina-faso\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1"},"description":"Des ae\u0301rosols pour constituer le noyau dur des ne\u0301bulosite\u0301s A\u0300 l'e\u0301cole, on enseigne que les nuages se forment ...","breadcrumb":{"@id":"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages#primaryimage","url":"https:\/\/static.africa-press.net\/burkina\/sites\/42\/2024\/04\/sm_1713007060.629894.jpg","contentUrl":"https:\/\/static.africa-press.net\/burkina\/sites\/42\/2024\/04\/sm_1713007060.629894.jpg","width":1200,"height":900,"caption":"M\u00e9t\u00e9o : au c\u0153ur des nuages"},{"@type":"BreadcrumbList","@id":"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/meteo-au-coeur-des-nuages#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Accueil","item":"https:\/\/www.africa-press.net\/burkina-faso\/"},{"@type":"ListItem","position":2,"name":"M\u00e9t\u00e9o : au c\u0153ur des nuages"}]},{"@type":"WebSite","@id":"https:\/\/www.africa-press.net\/burkina-faso\/#website","url":"https:\/\/www.africa-press.net\/burkina-faso\/","name":"Burkina Faso","description":"Just another Africa News Agency Sites site","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.africa-press.net\/burkina-faso\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"},{"@type":"Person","@id":"https:\/\/www.africa-press.net\/burkina-faso\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1","name":"cfeditorfr"}]}},"_links":{"self":[{"href":"https:\/\/www.africa-press.net\/burkina-faso\/wp-json\/wp\/v2\/posts\/84548","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.africa-press.net\/burkina-faso\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.africa-press.net\/burkina-faso\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/burkina-faso\/wp-json\/wp\/v2\/users\/82"}],"replies":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/burkina-faso\/wp-json\/wp\/v2\/comments?post=84548"}],"version-history":[{"count":0,"href":"https:\/\/www.africa-press.net\/burkina-faso\/wp-json\/wp\/v2\/posts\/84548\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/burkina-faso\/wp-json\/wp\/v2\/media\/84547"}],"wp:attachment":[{"href":"https:\/\/www.africa-press.net\/burkina-faso\/wp-json\/wp\/v2\/media?parent=84548"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.africa-press.net\/burkina-faso\/wp-json\/wp\/v2\/categories?post=84548"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.africa-press.net\/burkina-faso\/wp-json\/wp\/v2\/tags?post=84548"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}