{"id":12095,"date":"2021-09-19T12:00:42","date_gmt":"2021-09-19T12:00:42","guid":{"rendered":"https:\/\/www.africa-press.net\/niger\/politique\/le-trou-dans-la-couche-dozone-est-desormais-plus-grand-que-lantarctique"},"modified":"2021-09-20T13:46:52","modified_gmt":"2021-09-20T13:46:52","slug":"le-trou-dans-la-couche-dozone-est-desormais-plus-grand-que-lantarctique","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/le-trou-dans-la-couche-dozone-est-desormais-plus-grand-que-lantarctique","title":{"rendered":"Le trou dans la couche d\u2019ozone est d\u00e9sormais plus grand que l\u2019Antarctique"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong><a href=\"https:\/\/www.africa-press.net\/\">Africa-Press<\/a> &#8211; <a href=\"https:\/\/www.africa-press.net\/niger\">Niger<\/a>. <\/strong><\/span>Le trou dans la couche d\u2019ozone situ\u00e9 au-dessus du p\u00f4le Sud a atteint une \u00e9tendue plus importante que l\u2019Antarctique, soit 75% plus large que sa plus grande taille, selon l\u2019observatoire Copernicus.<\/p>\n<p>Apparu comme pr\u00e9vu au d\u00e9but du printemps dans l\u2019h\u00e9misph\u00e8re Sud, le trou dans la couche d\u2019ozone s\u2019av\u00e8re en 2021 \u00eatre plus inqui\u00e9tant que durant les ann\u00e9es pr\u00e9c\u00e9dentes, alertent les scientifiques de l\u2019observatoire europ\u00e9en de l\u2019atmosph\u00e8re Copernicus (CAMS).<\/p>\n<p>Ainsi selon eux, le trou dans la couche d\u2019ozone situ\u00e9 au-dessus du p\u00f4le Sud a \u00abd\u00e9sormais atteint une \u00e9tendue plus grande que l\u2019Antarctique\u00bb, soit 75% plus large que la plus grande taille qu\u2019il n\u2019ait jamais atteint ces derni\u00e8res ann\u00e9es.<\/p>\n<p><b>\u00abIl mesure actuellement entre 22 et 23 millions de kilom\u00e8tres carr\u00e9s, soit une taille proche du record du plus grand trou dans la couche d\u2019ozone atteint en 2006 avec 25 millions de kilom\u00e8tres carr\u00e9s\u00bb, explique Vincent-Henri Peuch, directeur du service Copernicus pour la surveillance de l\u2019atmosph\u00e8re cit\u00e9 par Le Parisien.<\/b><\/p>\n<p><b>Trop t\u00f4t pour paniquer<\/b><\/p>\n<p>La situation semble d\u2019autant plus pr\u00e9occupante que le trou n\u2019a pas encore atteint son apog\u00e9e, attendue entre mi-septembre et mi-octobre. Pourtant, le chercheur au Centre d\u2019a\u00e9ronomie spatiale Simon Chabrillat, contact\u00e9 par Le Point, estime qu\u2019il est encore trop t\u00f4t pour constater l\u2019ampleur du ph\u00e9nom\u00e8ne.<\/p>\n<p><b>\u00abC\u2019est plut\u00f4t dans un mois qu\u2019on pourra vraiment dire si la situation est exceptionnelle ou pas\u00bb, insiste-t-il.<\/b><\/p>\n<p>En effet, lorsque les temp\u00e9ratures commencent \u00e0 augmenter \u00e0 la fin du printemps austral, l\u2019appauvrissement de la couche d\u2019ozone ralentit. En d\u00e9cembre, les niveaux d\u2019ozone reviennent g\u00e9n\u00e9ralement \u00e0 la normale.<\/p>\n<p><b>Pas de retour \u00e0 la normale avant 2060<\/b><\/p>\n<p>La couche d\u2019ozone, qui prot\u00e8ge la plan\u00e8te des rayons ultraviolets, se reconstitue progressivement depuis l\u2019interdiction des halocarbures lors du protocole de Montr\u00e9al en 1987 par 24 pays et la Communaut\u00e9 \u00e9conomique europ\u00e9enne (CEE).<\/p>\n<p>N\u00e9anmoins, ce processus est assez lent et il faudra attendre \u00ables ann\u00e9es 2060 ou 2070 pour voir l\u2019\u00e9limination compl\u00e8te des substances appauvrissant la couche d\u2019ozone\u00bb, constate Copernicus dans un communiqu\u00e9.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Niger. Le trou dans la couche d\u2019ozone situ\u00e9 au-dessus du p\u00f4le Sud a atteint une \u00e9tendue plus importante que l\u2019Antarctique, soit 75% plus large que sa plus grande taille, selon l\u2019observatoire Copernicus. Apparu comme pr\u00e9vu au d\u00e9but du printemps dans l\u2019h\u00e9misph\u00e8re Sud, le trou dans la couche d\u2019ozone s\u2019av\u00e8re en 2021 \u00eatre plus [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":12094,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,11,10],"tags":[55,60,562,563,29],"class_list":["post-12095","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-homepage-french","category-toutes-les-actualites","tag-africa-press","tag-africa-press-niger","tag-dozone","tag-lantarctique","tag-niger"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Le trou dans la couche d\u2019ozone est d\u00e9sormais plus grand que l\u2019Antarctique - niger<\/title>\n<meta name=\"description\" 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