{"id":305353,"date":"2025-08-08T15:21:11","date_gmt":"2025-08-08T15:21:11","guid":{"rendered":"https:\/\/www.europesays.com\/fr\/305353\/"},"modified":"2025-08-08T15:21:11","modified_gmt":"2025-08-08T15:21:11","slug":"pourquoi-le-ciel-est-anormalement-blanc-malgre-le-retour-des-eclaircies","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/fr\/305353\/","title":{"rendered":"pourquoi le ciel est anormalement blanc, malgr\u00e9 le retour des \u00e9claircies\u00a0?"},"content":{"rendered":"<p>            Par<br \/>\n        <strong><br \/>\n            <a href=\"https:\/\/actu.fr\/auteur\/laurene-fertin\" title=\"Consulter tous les articles de Laur\u00e8ne Fertin\" target=\"_blank\" rel=\"noopener\">Laur\u00e8ne Fertin<\/a><br \/>\n        <\/strong><\/p>\n<p>        Publi\u00e9 le<\/p>\n<p>            8 ao\u00fbt 2025 \u00e0 16h30        <\/p>\n<p>Vous l\u2019avez sans doute remarqu\u00e9, ce vendredi 8\u00a0ao\u00fbt, le ciel de Bretagne s\u2019est couvert<strong> d\u2019une nappe blanche<\/strong> alors que <a href=\"https:\/\/actu.fr\/bretagne\/vannes_56260\/meteo-vague-de-chaleur-en-france-est-ce-que-la-bretagne-va-aussi-suffoquer_63002006.html\" target=\"_blank\" rel=\"noopener\">les temp\u00e9ratures et les \u00e9claircies sont au rendez-vous<\/a>, et ce, depuis mercredi 6\u00a0ao\u00fbt 2025.<\/p>\n<p class=\" wall-content\">Selon J\u00e9r\u00f4me Dr\u00e9ano, m\u00e9t\u00e9orologue \u00e0 <a href=\"https:\/\/meteofrance.com\/previsions-meteo-france\/bretagne\/5\" target=\"_blank\" rel=\"noopener\">M\u00e9t\u00e9o Bretagne<\/a>, il faut regarder du c\u00f4t\u00e9 du <strong>Canada.<\/strong> En effet, depuis que <strong>les incendies<\/strong> ravagent le pays, certains vents rapportent avec eux les fum\u00e9es jusqu\u2019en Europe et, ce vendredi, en Bretagne.<\/p>\n<p>Des vents en altitude<\/p>\n<p class=\" wall-content\">\u00ab\u2009Les vents en altitude sont responsables\u2009\u00bb, pr\u00e9cise le m\u00e9t\u00e9orologue, contact\u00e9 par la r\u00e9daction d\u2019<a href=\"https:\/\/actu.fr\/rennes\/\" target=\"_blank\" rel=\"noopener\">actu Rennes<\/a>. \u00ab\u2009Nous avons \u00e9t\u00e9 pris dans un flux du sud-ouest.\u2009\u00bb<\/p>\n<p class=\" wall-content\">Si des nuages \u00e9taient bien pr\u00e9sents dans la matin\u00e9e, <strong>les \u00e9claircies<\/strong> ont donc \u00e9t\u00e9 masqu\u00e9es par ce manteau blanc visible dans le ciel, qui n\u2019est rien d\u2019autre que <strong>des fum\u00e9es en suspension<\/strong>.<\/p>\n<p class=\" wall-content\">\n<p>0,25 d\u2019\u00e9paisseur optique<\/p>\n<p class=\" wall-content\">Pour quantifier <strong>les a\u00e9ro<\/strong><strong>sols<\/strong> pr\u00e9sents dans l\u2019atmosph\u00e8re, on parle alors <strong>d\u2019\u00e9paisseur optique<\/strong> \u00ab\u2009pour permettre de savoir \u00e0 quel point ces m\u00eames a\u00e9rosols masquent la lumi\u00e8re\u2009\u00bb, explique le m\u00e9t\u00e9orologue.<\/p>\n<blockquote class=\"ac-article-quote wall-content\">\n<p>L&rsquo;\u00e9paisseur optique est actuellement de 0.25 ce vendredi 8 ao\u00fbt, aux alentours de 15h. C&rsquo;est un chiffre qui permet de dire que les a\u00e9rosols sont mod\u00e9r\u00e9ment concentr\u00e9s. Dans d&rsquo;autres situations, les valeurs peuvent aller jusqu&rsquo;\u00e0 3.<\/p>\n<p>    <strong>J\u00e9r\u00f4me Dr\u00e9ano<\/strong><br \/>\n        M\u00e9t\u00e9orologue \u00e0 M\u00e9t\u00e9o Bretagne    <\/p><\/blockquote>\n<p>Des fum\u00e9es qui vont se disperser<\/p>\n<p class=\" wall-content\">Selon J\u00e9r\u00f4me Dr\u00e9ano, la journ\u00e9e de samedi sera encore concern\u00e9e par les fum\u00e9es en suspension dans la matin\u00e9e, avant qu\u2019elles ne <strong>se dispersent vers l\u2019est<\/strong>. \u00ab\u2009Cela signifie que les <strong>concentrations<\/strong> seront <strong>plus faibles\u2009\u00bb,<\/strong> ajoute le professionnel.<\/p>\n<p class=\" wall-content\">Suivez toute l\u2019actualit\u00e9 de vos villes et m\u00e9dias favoris en vous inscrivant \u00e0 <a href=\"https:\/\/moncompte.actu.fr\" title=\"D\u00e9couvez Mon Actu\" rel=\"nofollow noopener\" data-trk=\"{&quot;cta&quot;:{&quot;action&quot;:&quot;https:\\\/\\\/moncompte.actu.fr&quot;,&quot;category&quot;:&quot;mon compte&quot;,&quot;from&quot;:&quot;article footer&quot;,&quot;name&quot;:&quot;Mon actu&quot;,&quot;type&quot;:&quot;cta&quot;}}\" target=\"_blank\">Mon Actu<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"Par Laur\u00e8ne Fertin Publi\u00e9 le 8 ao\u00fbt 2025 \u00e0 16h30 Vous l\u2019avez sans doute remarqu\u00e9, ce vendredi 8\u00a0ao\u00fbt,&hellip;\n","protected":false},"author":2,"featured_media":305354,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2821],"tags":[1111,11,829,574,1777,674,1011,27,2487,12,584,25],"class_list":{"0":"post-305353","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-rennes","8":"tag-actu","9":"tag-actualites","10":"tag-bretagne","11":"tag-canada","12":"tag-eu","13":"tag-europe","14":"tag-fr","15":"tag-france","16":"tag-meteo","17":"tag-news","18":"tag-rennes","19":"tag-republique-francaise"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@fr\/114993829212091616","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/posts\/305353","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/comments?post=305353"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/posts\/305353\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/media\/305354"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/media?parent=305353"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/categories?post=305353"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/tags?post=305353"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}