{"id":4546,"date":"2026-10-31T19:59:31","date_gmt":"2026-10-31T18:59:31","guid":{"rendered":"https:\/\/africaeyesnews.com\/?p=4546"},"modified":"2026-10-31T19:59:37","modified_gmt":"2026-10-31T18:59:37","slug":"changement-climatique-lomm-alerte-sur-un-nouveau-record-de-gaz-a-effet-de-serre","status":"publish","type":"post","link":"https:\/\/africaeyesnews.com\/index.php\/2026\/10\/31\/changement-climatique-lomm-alerte-sur-un-nouveau-record-de-gaz-a-effet-de-serre\/","title":{"rendered":"Changement climatique: L&rsquo;OMM alerte sur un nouveau record de gaz \u00e0 effet de Serre."},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Au monde , les niveaux de gaz \u00e0 effet de serre atteignent \u00e0 nouveau un niveau record.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La longue dur\u00e9e de vie du dioxyde de carbone condamne la plan\u00e8te \u00e0 un avenir plus chaud.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C&rsquo;est ce que pr\u00e9cise le dernier rapport de l&rsquo;organisation M\u00e9t\u00e9orologique Mondiale dans son rapport publi\u00e9 r\u00e9cemment \u00e0 Gen\u00e8ve \u00e0 son si\u00e8ge.<br>Les niveaux de dioxyde de carbone ( CO2 ) et d\u2019autres gaz \u00e0 effet de serre majeurs dans l\u2019atmosph\u00e8re ont atteint des niveaux sans pr\u00e9c\u00e9dent en 2025, ce qui entra\u00eenera une augmentation de temp\u00e9rature \u00e0 long terme pour la plan\u00e8te signale cette organisation de<br>Nations Unies.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Son Bulletin des gaz \u00e0 effet de serre de l&rsquo;OMM indique que la concentration moyenne mondiale de CO\u2082 en surface en 2025 atteindra 426,8 parties par million, soit 153 % du niveau de r\u00e9f\u00e9rence pr\u00e9industriel de 1750. Les concentrations de m\u00e9thane et d&rsquo;oxyde nitreux \u2013respectivement deuxi\u00e8me et troisi\u00e8me gaz \u00e0 effet de serre \u00e0 longue dur\u00e9e de vie les plus importants li\u00e9s aux activit\u00e9s humaines \u2013 ont \u00e9galement atteint un nouveau record<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cette ann\u00e9e est \u00ab Une ann\u00e9e de plus, un nouveau record. Les gaz \u00e0 effet de serre emprisonnent une quantit\u00e9 de chaleur sans pr\u00e9c\u00e9dent dans l\u2019atmosph\u00e8re, alimentant des ph\u00e9nom\u00e8nes m\u00e9t\u00e9orologiques extr\u00eames et les risques qui en d\u00e9coulent pour nos \u00e9conomies et nos soci\u00e9t\u00e9s.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cette organisation pr\u00e9cise que les onze derni\u00e8res ann\u00e9es \u00e9taient les plus chaudes jamais enregistr\u00e9es et cette tendance devrait se poursuivre.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le CO\u2082 a une dur\u00e9e de vie tr\u00e8s longue et affectera donc le climat mondial non seulement pendant des ann\u00e9es, mais aussi pendant des d\u00e9cennies, voire des si\u00e8cles \u00bb, c&rsquo;est ce qu&rsquo;\u00e0 d\u00e9clar\u00e9 Ko Barrett, Secr\u00e9taire g\u00e9n\u00e9ral adjoint de l\u2019OMM.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ce bulletin phare annuel fournit des informations scientifiques de r\u00e9f\u00e9rence aux n\u00e9gociateurs de la Conf\u00e9rence des Nations Unies sur le climat (COP 31). Cette r\u00e9union, qui se tiendra \u00e0 Antalya (Turquie) du 9 au 20 novembre, vise \u00e0 transformer les engagements climatiques en actions concr\u00e8tes souligne cette organisation dans ce rapport partag\u00e9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ce bulletin rend compte des concentrations de gaz \u00e0 effet de serre \u2013 c\u2019est-\u00e0-dire de la quantit\u00e9 de gaz qui s\u2019accumule dans l\u2019atmosph\u00e8re \u2013 et non des nouvelles \u00e9missions annuelles.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Environ la moiti\u00e9 du CO\u2082 \u00e9mis chaque ann\u00e9e reste dans l\u2019atmosph\u00e8re, le reste \u00e9tant absorb\u00e9 par les \u00e9cosyst\u00e8mes terrestres et les oc\u00e9ans.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ce rapport montre que l&rsquo;indice annuel des gaz \u00e0 effet de serre de la NOAA (National Oceanic and Atmospheric Administration) prouve qu&rsquo;entre 1990 et 2025, le for\u00e7age radiatif \u2013 l&rsquo;effet de r\u00e9chauffement sur notre climat \u2013 d\u00fb aux gaz \u00e0 effet de serre \u00e0 longue dur\u00e9e de vie a augment\u00e9 de 56 %, le CO2 repr\u00e9sentant environ 81 % de cette augmentation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les taux de croissance du CO2 ont tripl\u00e9 depuis les ann\u00e9es 1960, passant d&rsquo;une augmentation annuelle moyenne de 0,8 ppm \u00e0 2,4 ppm au cours de la d\u00e9cennie 2011-2020. De 2024 \u00e0 2025, la concentration moyenne mondiale de CO2 a augment\u00e9 de 2,8 ppm, soit au-dessus de la moyenne d\u00e9cennale mais l\u00e9g\u00e8rement en dessous de la hausse exceptionnelle de 2023\/2024<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L&rsquo;OMM attire l&rsquo;attention des communaut\u00e9s et des gouvernements afin de travailler efficacement pour rem\u00e9dier \u00e0 ce probl\u00e8me qui touche l&rsquo;humanit\u00e9.<br>Le Programme de la Veille de l&rsquo;atmosph\u00e8re globale de l&rsquo;OMM coordonne les observations et l&rsquo;analyse syst\u00e9matiques des gaz \u00e0 effet de serre et autres constituants atmosph\u00e9riques.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L&rsquo;Organisation m\u00e9t\u00e9orologique mondiale est l&rsquo;organe officiel du syst\u00e8me des Nations Unies en mati\u00e8re de m\u00e9t\u00e9orologie, de climat et d&rsquo;eau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Par Ren\u00e9 BAGALWA<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Au monde , les niveaux de gaz \u00e0 effet de serre atteignent \u00e0 nouveau un niveau record. La longue dur\u00e9e de vie du dioxyde de carbone condamne la plan\u00e8te \u00e0 un avenir plus chaud. C&rsquo;est ce que pr\u00e9cise le dernier rapport de l&rsquo;organisation M\u00e9t\u00e9orologique Mondiale dans son rapport publi\u00e9 r\u00e9cemment \u00e0 Gen\u00e8ve \u00e0 son si\u00e8ge.Les [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4547,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"page_builder":"","footnotes":""},"categories":[20,22],"tags":[],"class_list":["post-4546","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-breaking-news","category-food"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Changement climatique: L&#039;OMM alerte sur un nouveau record de gaz \u00e0 effet de Serre. - Africa Eyes News<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/africaeyesnews.com\/index.php\/2026\/10\/31\/changement-climatique-lomm-alerte-sur-un-nouveau-record-de-gaz-a-effet-de-serre\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Changement climatique: L&#039;OMM alerte sur un nouveau record de gaz \u00e0 effet de Serre. - Africa Eyes News\" \/>\n<meta property=\"og:description\" content=\"Au monde , les niveaux de gaz \u00e0 effet de serre atteignent \u00e0 nouveau un niveau record. La longue dur\u00e9e de vie du dioxyde de carbone condamne la plan\u00e8te \u00e0 un avenir plus chaud. 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