{"id":194301,"date":"2026-09-22T08:38:00","date_gmt":"2026-09-22T06:38:00","guid":{"rendered":"https:\/\/newmobility.news\/?p=194301"},"modified":"2026-09-22T08:38:00","modified_gmt":"2026-09-22T06:38:00","slug":"tackling-contrails-buys-the-earth-10-years","status":"publish","type":"post","link":"https:\/\/newmobility.news\/fr\/2026\/09\/22\/tackling-contrails-buys-the-earth-10-years\/","title":{"rendered":"La lutte contre les tra\u00een\u00e9es de condensation permet de gagner 10 ans pour la Terre"},"content":{"rendered":"<p>Aussi po\u00e9tiques que puissent para\u00eetre les tra\u00een\u00e9es de condensation, ces tra\u00een\u00e9es blanches laiss\u00e9es par les avions volant \u00e0 haute altitude sont loin d\u2019\u00eatre aussi inoffensives qu\u2019elles le laissent croire.<\/p>\n<p>Bien qu'elles ne proviennent que d'une petite partie des vols, elles contribuent au r\u00e9chauffement climatique dans une mesure comparable \u00e0 celle des \u00e9missions de CO\u2082 du secteur a\u00e9rien.<\/p>\n<p>Un nouveau rapport de Klima Consulting, command\u00e9 par l'organisation environnementale T&amp;E, indique que le fait d'emp\u00eacher la formation de ces tra\u00een\u00e9es de condensation pourrait retarder le r\u00e9chauffement climatique li\u00e9 \u00e0 l'aviation de pr\u00e8s de 10 ans.<\/p>\n<h4>Couverture chauffante<\/h4>\n<p>Lorsque les avions traversent des couches d'air froides et humides \u00e0 une altitude comprise entre 8 et 14 km environ, le r\u00e9acteur \u00e9met, entre autres, de la vapeur d'eau et des particules de suie lors de la combustion du k\u00e9ros\u00e8ne. Si la temp\u00e9rature de l'air est inf\u00e9rieure \u00e0 environ -40 \u00b0C et que l'humidit\u00e9 est suffisante, la vapeur d'eau et les particules de suie pr\u00e9sentes dans les gaz d'\u00e9chappement se condensent en cristaux de glace. Ceux-ci forment la fameuse tra\u00een\u00e9e blanche.<\/p>\n<p>La plupart des tra\u00een\u00e9es de condensation disparaissent au bout de quelques minutes, mais lorsque l'avion traverse une masse d'air tr\u00e8s froide et humide, ces cristaux peuvent se transformer en voiles nuageux artificiels ou en cirrus qui peuvent persister pendant des heures, voire des jours.<\/p>\n<p>Pendant la journ\u00e9e, elles r\u00e9fl\u00e9chissent une petite partie de la lumi\u00e8re solaire ou la laissent passer en grande partie, mais la nuit, elles absorbent principalement la chaleur \u00e9manant de la Terre. Au final, les tra\u00een\u00e9es de condensation ont un puissant effet de r\u00e9chauffement sur la Terre \u2013 en r\u00e9alit\u00e9, un effet aussi important, voire sup\u00e9rieur, \u00e0 celui de l\u2019ensemble des \u00e9missions de CO\u2082 g\u00e9n\u00e9r\u00e9es par l\u2019aviation.<\/p>\n<p>La bonne nouvelle, c\u2019est que seule une petite fraction de l\u2019ensemble des vols est \u00e0 l\u2019origine de la plupart des tra\u00een\u00e9es de condensation persistantes, car la plupart des avions ne traversent pas ces couches. En 2019, par exemple, seuls 3% de l'ensemble des vols ont repr\u00e9sent\u00e9 environ 80% du r\u00e9chauffement d\u00fb aux tra\u00een\u00e9es de condensation (principalement des vols de nuit et des vols en hiver).<\/p>\n<p><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-194328 size-large\" src=\"https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-21-at-12.42.51.png?resize=640%2C551&#038;ssl=1\" alt=\"\" width=\"640\" height=\"551\" \/><\/p>\n<h4>L'impact est consid\u00e9rable<\/h4>\n<p>Cependant, le r\u00e9chauffement qu\u2019ils provoquent est consid\u00e9rable : l\u2019impact climatique des effets autres que le CO\u2082 est au moins aussi important que celui du CO\u2082. Et si l\u2019aviation continue de se d\u00e9velopper sans frein, la consommation \u00e9nerg\u00e9tique mondiale du secteur pourrait non seulement plus que doubler d\u2019ici 2050 par rapport \u00e0 2019, mais dans 20 ans, l\u2019effet de r\u00e9chauffement des tra\u00een\u00e9es de condensation d\u2019un vol moyen sera en r\u00e9alit\u00e9 sup\u00e9rieur \u00e0 celui du CO\u2082.<\/p>\n<p>Compte tenu des niveaux actuels de trafic a\u00e9rien, r\u00e9duire de moiti\u00e9 le r\u00e9chauffement caus\u00e9 par les tra\u00een\u00e9es de condensation sur une p\u00e9riode de 100 ans permettrait d'\u00e9conomiser entre 67 et 225 Mt d'\u00e9quivalent CO\u2082 par an. Cela correspond \u00e0 7% \u00e0 23% des \u00e9missions mondiales de CO\u2082 dues \u00e0 l\u2019aviation en 2025, soit les \u00e9missions annuelles de 15 \u00e0 50 millions de voitures \u00e0 essence.<\/p>\n<p>En cons\u00e9quence, la contribution de l\u2019aviation au r\u00e9chauffement climatique n\u2019atteindrait pas 0,08 \u00b0C avant 2050, et non d\u00e8s 2040. Si le r\u00e9chauffement d\u00fb aux tra\u00een\u00e9es de condensation \u00e9tait r\u00e9duit de moiti\u00e9 \u00e0 partir de 2030, cela permettrait d\u2019\u00e9viter un r\u00e9chauffement d\u2019environ 0,025 \u00b0C d\u2019ici 2050 et d\u2019environ 0,049 \u00b0C d\u2019ici 2070.<\/p>\n<p>En d\u2019autres termes : \u00e9viter les tra\u00een\u00e9es de condensation permettrait de lib\u00e9rer entre 3 et 51 TP3T points de temp\u00e9rature mondiale pour la p\u00e9riode 2025-2050 dans un sc\u00e9nario \u00e0 2 \u00b0C \u2013 un budget qui, sans cela, serait consomm\u00e9 par le secteur a\u00e9rien.<\/p>\n<h4>\u00c9viter les tra\u00een\u00e9es de condensation et des billets l\u00e9g\u00e8rement plus chers<\/h4>\n<p>Pour contribuer \u00e0 r\u00e9soudre ce probl\u00e8me, T&amp;E propose de mettre en place des mesures visant \u00e0 \u00e9viter la formation de tra\u00een\u00e9es de condensation. Dans le cadre de cette approche, les avions empruntent un itin\u00e9raire l\u00e9g\u00e8rement modifi\u00e9 ou volent \u00e0 une altitude l\u00e9g\u00e8rement diff\u00e9rente afin d\u2019\u00e9viter les couches d\u2019air tr\u00e8s froides et humides. En ajustant \u00e0 peine 3% des vols, plus de la moiti\u00e9 du r\u00e9chauffement caus\u00e9 par les tra\u00een\u00e9es de condensation pourrait \u00eatre \u00e9vit\u00e9.<\/p>\n<p>Les scientifiques ont toutefois soulign\u00e9 que le changement d'itin\u00e9raire n'\u00e9tait int\u00e9ressant que si les avantages climatiques li\u00e9s \u00e0 la r\u00e9duction des tra\u00een\u00e9es de condensation l'emportaient sur les \u00e9missions suppl\u00e9mentaires de CO\u2082, et que le choix de la r\u00e9f\u00e9rence avait une grande importance.<\/p>\n<p>Mais le r\u00e9acheminement des vols entra\u00eene une consommation suppl\u00e9mentaire de carburant : jusqu\u2019\u00e0 5% de CO\u2082 en plus par vol, mais moins de 0,5% pour l\u2019ensemble du secteur a\u00e9rien. T&amp;E fait donc valoir que les avantages climatiques sont au moins 10 fois sup\u00e9rieurs \u00e0 cet inconv\u00e9nient, voire 100 fois sup\u00e9rieurs. L'organisation estime le co\u00fbt \u00e0 environ 4 \u20ac par billet Paris-New York et \u00e0 1 \u20ac pour un vol en Europe.<\/p>\n<p>Des carburants plus propres, contenant moins de compos\u00e9s aromatiques, ainsi que de nouveaux moteurs peuvent \u00e9galement r\u00e9duire la suie et, par cons\u00e9quent, les tra\u00een\u00e9es de condensation, bien que l'effet exact fasse encore l'objet d'\u00e9tudes.<\/p>\n<figure id=\"attachment_194330\" aria-describedby=\"caption-attachment-194330\" style=\"width: 640px\" class=\"wp-caption aligncenter\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"wp-image-194330 size-large\" src=\"https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-21-at-12.41.55.png?resize=640%2C346&#038;ssl=1\" alt=\"\" width=\"640\" height=\"346\" srcset=\"https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-21-at-12.41.55.png?resize=1024%2C554&amp;ssl=1 1024w, https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Screenshot-2026-09-21-at-12.41.55.png?w=1280&amp;ssl=1 1280w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption id=\"caption-attachment-194330\" class=\"wp-caption-text\">Source : T&amp;E<\/figcaption><\/figure>\n<h4>Recommandations<\/h4>\n<p>T&amp;E souligne \u00e9galement que, malgr\u00e9 cet impact consid\u00e9rable, il n'existe actuellement aucune mesure contraignante, ni au niveau r\u00e9gional ni au niveau mondial, visant \u00e0 r\u00e9duire l'impact climatique de l'aviation autre que celui li\u00e9 au CO\u2082.<\/p>\n<p>En 2025, la Commission europ\u00e9enne a commenc\u00e9 \u00e0 surveiller les \u00e9missions autres que le CO\u2082 provenant du secteur a\u00e9rien et, tout r\u00e9cemment, dans le cadre de la r\u00e9vision du syst\u00e8me communautaire d'\u00e9change de quotas d'\u00e9mission (SCEQE), elle a propos\u00e9 d'octroyer des quotas d'\u00e9mission gratuits aux compagnies a\u00e9riennes qui parviennent \u00e0 \u00e9viter la formation de tra\u00een\u00e9es de condensation.<\/p>\n<p>Et contrairement \u00e0 ce que le secteur a\u00e9rien avait l'habitude d'affirmer, T&amp;E soutient \u00e9galement que les preuves scientifiques sont d\u00e9sormais suffisamment solides pour justifier des mesures politiques fond\u00e9es sur le principe de pr\u00e9caution.<\/p>\n<p>Il recommande donc que l'UE \u00e9tende son syst\u00e8me de surveillance des \u00e9missions autres que le CO\u2082 \u00e0 l'ensemble des vols d'ici 2027 afin d'approfondir les connaissances scientifiques sur ces \u00e9missions, et que les programmes de recherche de l\u2019UE se concentrent sur les incertitudes qui affectent le plus significativement l\u2019att\u00e9nuation des tra\u00een\u00e9es de condensation et entravent la lutte contre le r\u00e9chauffement climatique qu\u2019elles provoquent, notamment la pr\u00e9vision de l\u2019humidit\u00e9 et la v\u00e9rification en temps r\u00e9el des tra\u00een\u00e9es de condensation par satellite.<\/p>\n<p>Cet hiver, un consortium \u2013 comprenant le gouvernement britannique et les services de contr\u00f4le a\u00e9rien \u2013 m\u00e8nera l\u2019op\u00e9ration \u00ab Blue Sky \u00bb, le premier essai au monde men\u00e9 \u00e0 l\u2019\u00e9chelle d\u2019un espace a\u00e9rien oc\u00e9anique visant \u00e0 r\u00e9duire le r\u00e9chauffement caus\u00e9 par les tra\u00een\u00e9es de condensation au-dessus de l\u2019Atlantique Nord.<\/p>\n<p>Des essais et des mesures de r\u00e9acheminement visant \u00e0 \u00e9viter les tra\u00een\u00e9es de condensation sont \u00e9galement men\u00e9s dans le cadre des projets europ\u00e9ens A4 Climate et CICONIA.<\/p>","protected":false},"excerpt":{"rendered":"<p>As poetic as a contrail &#8211; or condensation trail &#8211; may be, the white trails left behind by high-altitude aircraft are not nearly as harmless as they appear. Although they come from only a small fraction of flights, they contribute to global warming at a level comparable to aviation&#8217;s CO2 emissions. A new report by [&hellip;]<\/p>\n","protected":false},"author":164,"featured_media":194327,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"{title}\r\n\r\n{excerpt}\r\n\r\n{url}","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"_wpas_customize_per_network":false,"jetpack_post_was_ever_published":false},"categories":[77152,14496,29,28,7,4],"tags":[],"class_list":["post-194301","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aviation","category-climate","category-environment","category-europe","category-mobility","category-top-stories-today"],"acf":[],"featured_image_urls_v2":{"full":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?fit=1978%2C1398&ssl=1",1978,1398,false],"thumbnail":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?resize=150%2C150&ssl=1",150,150,true],"medium":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?fit=300%2C212&ssl=1",300,212,true],"medium_large":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?fit=640%2C452&ssl=1",640,452,true],"large":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?fit=640%2C453&ssl=1",640,453,true],"1536x1536":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?fit=1536%2C1086&ssl=1",1536,1086,true],"2048x2048":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?fit=1978%2C1398&ssl=1",1978,1398,true],"trp-custom-language-flag":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?fit=18%2C12&ssl=1",18,12,true],"related-thumb":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?resize=640%2C480&ssl=1",640,480,true],"gform-image-choice-sm":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?resize=300%2C300&ssl=1",300,300,true],"gform-image-choice-md":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?resize=400%2C400&ssl=1",400,400,true],"gform-image-choice-lg":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?resize=600%2C600&ssl=1",600,600,true],"mailchimp":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?fit=560%2C396&ssl=1",560,396,true],"unipress-phone":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?resize=640%2C100&ssl=1",640,100,true],"unipress-tablet":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?resize=1536%2C240&ssl=1",1536,240,true],"unipress-tablet-portrait":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?resize=1536%2C180&ssl=1",1536,180,true],"unipress-tablet-landscape":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?resize=1978%2C180&ssl=1",1978,180,true],"unipress-smartphone":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?resize=1080%2C168&ssl=1",1080,168,true],"unipress-wide-screen":["https:\/\/i0.wp.com\/newmobility.news\/wp-content\/uploads\/2026\/09\/Untitled88-2.png?resize=1978%2C180&ssl=1",1978,180,true]},"post_excerpt_stackable_v2":"<p>As poetic as a contrail &#8211; or condensation trail &#8211; may be, the white trails left behind by high-altitude aircraft are not nearly as harmless as they appear. Although they come from only a small fraction of flights, they contribute to global warming at a level comparable to aviation&#8217;s CO2 emissions. A new report by Klima Consulting, commissioned by the environmental organization T&amp;E, states that preventing the formation of these contrails could delay aviation-induced global warming by as much as 10 years. Heat blanket When airplanes fly through cold, humid layers of air at an altitude of approximately 8 to&hellip;<\/p>\n","category_list_v2":"<a href=\"https:\/\/newmobility.news\/fr\/category\/aviation\/\" rel=\"category tag\">Aviation<\/a>, <a href=\"https:\/\/newmobility.news\/fr\/category\/climate\/\" rel=\"category tag\">Climate<\/a>, <a href=\"https:\/\/newmobility.news\/fr\/category\/environment\/\" rel=\"category tag\">Environment<\/a>, <a href=\"https:\/\/newmobility.news\/fr\/category\/europe\/\" rel=\"category tag\">Europe<\/a>, <a href=\"https:\/\/newmobility.news\/fr\/category\/mobility\/\" rel=\"category tag\">Mobility<\/a>, <a href=\"https:\/\/newmobility.news\/fr\/category\/top-stories-today\/\" rel=\"category tag\">Top Stories Today<\/a>","author_info_v2":{"name":"Luc Joris","url":"https:\/\/newmobility.news\/fr\/author\/belga-5\/"},"comments_num_v2":"0 comments","yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Tackling contrails buys the Earth 10 years - newmobility.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:\/\/newmobility.news\/fr\/2026\/09\/22\/tackling-contrails-buys-the-earth-10-years\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tackling contrails buys the Earth 10 years - newmobility.news\" \/>\n<meta property=\"og:description\" content=\"As poetic as a contrail &#8211; or condensation trail &#8211; may be, the white trails left behind by high-altitude aircraft are not nearly as harmless as they appear. Although they come from only a small fraction of flights, they contribute to global warming at a level comparable to aviation&#8217;s CO2 emissions. 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