{"id":6774,"date":"2015-05-25T13:00:48","date_gmt":"2015-05-25T11:00:48","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil\/?p=6774"},"modified":"2015-05-21T10:15:30","modified_gmt":"2015-05-21T08:15:30","slug":"limpact-du-jet-stream-sur-les-avions","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/limpact-du-jet-stream-sur-les-avions\/","title":{"rendered":"L&rsquo;impact du jet-stream sur les avions"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<div class=\"p402_premium\">\n<p style=\"text-align: justify;\">On les appelle les Jet-stream, ou courants-jets dans la version fran\u00e7aise. Ces vents permanents qui soufflent d&rsquo;ouest en est jusqu&rsquo;\u00e0 10 kilom\u00e8tres d&rsquo;altitude, peuvent atteindre 400 km\/h et avoir une r\u00e9elle incidence sur la dur\u00e9e des vols transatlantiques. Les travers\u00e9es se r\u00e9v\u00e8lent plus longues ou plus courtes selon le sens du vol. Le 8 janvier, le vol 114 de British Airways a ainsi effectu\u00e9 la liaison New York-Londres en seulement 5 h 16, contre pr\u00e8s de 6 h 50 normalement.<\/p>\n<p style=\"text-align: justify;\">Avec le vent dans le dos, l&rsquo;appareil a acc\u00e9l\u00e9r\u00e9 sa vitesse en se laissant porter, et se serait ainsi offert le record de la travers\u00e9e de l&rsquo;Atlantique nord pour un avion de ligne. Pour les appareils qui parcourent l&rsquo;oc\u00e9an dans le sens Europe-\u00c9tats-Unis, les difficult\u00e9s se corsent puisque, en affrontant les vents de face, les r\u00e9acteurs montent en r\u00e9gime et d\u00e9pensent plus. La jauge de k\u00e9ros\u00e8ne fr\u00f4lant le seuil de s\u00e9curit\u00e9, les Airbus ou les Boeing doivent instamment remplir les r\u00e9servoirs avant d&rsquo;atteindre leur destination. C&rsquo;est ainsi qu&rsquo;\u00e0 l&rsquo;avant-poste de l&rsquo;Am\u00e9rique du nord, \u00e0 la pointe-Est du Labrador, le petit a\u00e9roport canadien de Goose Bay a ravitaill\u00e9 plusieurs long-courriers.<\/p><div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"2\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n<p style=\"text-align: justify;\">\u00abCe ph\u00e9nom\u00e8ne r\u00e9sulte d&rsquo;un fort contraste de temp\u00e9ratures dans la troposph\u00e8re. Plus le contraste de temp\u00e9ratures va \u00eatre marqu\u00e9, plus le courant-jet sera fort. Au fur et \u00e0 mesure que l&rsquo;avion monte, le vent va se renforcer jusqu&rsquo;\u00e0 dix \u00e0 douze kilom\u00e8tres d&rsquo;altitude\u00bb, explique Alexandre Flouttard, pr\u00e9visionniste M\u00e9t\u00e9o France \u00e0 Toulouse (division a\u00e9ronautique). \u00abCe ph\u00e9nom\u00e8ne est av\u00e9r\u00e9. C&rsquo;est pourquoi nous publions p\u00e9riodiquement des cartes \u00e0 l&rsquo;usage des contr\u00f4leurs a\u00e9riens et des compagnies. En fonction de ces relev\u00e9s, les pilotes peuvent \u00eatre amen\u00e9s \u00e0 orienter leur route diff\u00e9remment\u00bb, ajoute l&rsquo;ing\u00e9nieur.<\/p>\n<p style=\"text-align: justify;\">Mais quel rapport avec le climat ? Le d\u00e9r\u00e8glement du jet-stream serait li\u00e9 \u00e0 la fonte acc\u00e9l\u00e9r\u00e9e de l&rsquo;Arctique qui se r\u00e9chauffe sous l&rsquo;effet de l&rsquo;activit\u00e9 humaine. Vrai, faux ? Les observations permettent-elles de d\u00e9gager une tendance ? En tout cas, la question agite le Landerneau scientifique et divise les chercheurs. Alexandre Flouttard, lui, \u00e9vite les r\u00e9ponses trop cat\u00e9goriques. Par contre, les temp\u00eates ayant tendance \u00e0 \u00eatre plus puissantes, une chose est s\u00fbre : les turbulences s&rsquo;en ressentiront \u00e0 bord des avions\u2026<\/p>\n<p style=\"text-align: justify;\"><a href=\"http:\/\/www.laterredufutur.com\/accueil\/\">TDF<\/a><\/p>\n<p>source :\u00a0<a href=\"http:\/\/www.ladepeche.fr\/\" target=\"_blank\">http:\/\/www.ladepeche.fr\/<\/a><\/p>\n<\/div>\n<p>&nbsp;<\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"6774\">(323)<\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>On les appelle les Jet-stream, ou courants-jets dans la version fran\u00e7aise. Ces vents permanents qui soufflent d&rsquo;ouest en est jusqu&rsquo;\u00e0&#8230;<\/p>\n","protected":false},"author":1,"featured_media":6775,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","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}},"categories":[20],"tags":[239,252,89,2747,1204,141,594],"class_list":["post-6774","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-climat","tag-anomalie","tag-atmosphere","tag-avion","tag-courant-jet","tag-jet-stream","tag-vent","tag-vitesse","wpcat-20-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/05\/avion.jpg?fit=1280%2C976&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-1Lg","jetpack-related-posts":[{"id":2489,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-jet-stream-perd-le-nord\/","url_meta":{"origin":6774,"position":0},"title":"Le Jet-stream perd le nord","author":"Admin","date":"1 mars 2015","format":false,"excerpt":"Le d\u00e9r\u00e8glement du jet-stream, vent d'altitude pr\u00e9pond\u00e9rant sur la climatologie, pourrait bien avoir d\u00e9but\u00e9 sous l'effet de la fonte acc\u00e9l\u00e9r\u00e9e de l'Arctique selon les m\u00e9dias, mais la v\u00e9rit\u00e9 pourrait \u00eatre ailleurs. La question se pose, car les vents d'altitude sont anormalement d\u00e9cha\u00een\u00e9s et perturbent jusqu'\u00e0 la dur\u00e9e des vols transatlantiques.","rel":"","context":"Dans &quot;Climat&quot;","block_context":{"text":"Climat","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/climat\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/03\/laterredufutur.com_photos_ao-nov2014-mars2015.jpg?fit=600%2C254&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/03\/laterredufutur.com_photos_ao-nov2014-mars2015.jpg?fit=600%2C254&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/03\/laterredufutur.com_photos_ao-nov2014-mars2015.jpg?fit=600%2C254&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":3187,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-jet-stream-polaire-mis-a-lepreuve\/","url_meta":{"origin":6774,"position":1},"title":"Le jet stream polaire mis \u00e0 l&rsquo;\u00e9preuve","author":"Admin","date":"21 d\u00e9cembre 2005","format":false,"excerpt":"Courant a\u00e9rien d'une force peu commune, ceinturant le globe terrestre sous la forme de deux anneaux situ\u00e9s au-dessus des h\u00e9misph\u00e8res nord et sud \u00e0 environ 10\u00a0000 m\u00e8tres d'altitude. La vitesse du vent, dans le Jet Stream, d\u00e9passe les 300 km\/h et r\u00e9sulte du contraste thermique existant \u00e0 cette altitude entre\u2026","rel":"","context":"Dans &quot;Climat&quot;","block_context":{"text":"Climat","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/climat\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/04\/jetstream_canada.jpeg?fit=400%2C300&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":8262,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-jet-stream-grand-argentier-de-la-situation-meteorologique-actuelle\/","url_meta":{"origin":6774,"position":2},"title":"Le jet stream, grand argentier de la situation m\u00e9t\u00e9orologique actuelle","author":"Admin","date":"16 septembre 2015","format":false,"excerpt":"La temp\u00eate \u202aHenry positionn\u00e9e \u00e0 l'ouest de l'Europe, ce mercredi 16 septembre 2015, avec de tr\u00e8s fortes pluies, des vents forts. Il faut noter tout bonnement que le jet-stream polaire plonge jusqu'au sud de l'Espagne. Low = Basse pression, le vent tourne dans le sens inverse des aiguilles d'une montre,\u2026","rel":"","context":"Dans &quot;M\u00e9t\u00e9orologie&quot;","block_context":{"text":"M\u00e9t\u00e9orologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/meteorologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/09\/jetstream.png?fit=768%2C512&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/09\/jetstream.png?fit=768%2C512&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/09\/jetstream.png?fit=768%2C512&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/09\/jetstream.png?fit=768%2C512&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":10791,"url":"https:\/\/www.laterredufutur.com\/accueil\/londres-new-york-en-11-minutes\/","url_meta":{"origin":6774,"position":3},"title":"Londres-New York en 11 minutes","author":"Admin","date":"7 f\u00e9vrier 2016","format":false,"excerpt":"Londres-New York en 11 minutes, l'extravagant projet de Bombardier. Baptis\u00e9 Antipode, ce concept de jet hypersonique imagin\u00e9 par l'inventeur canadien Charles Bombardier pourrait atteindre 20.000 km\/h. \u00c0 condition de r\u00e9soudre de nombreuses contraintes. Si les projets de jets supersoniques ne manquent pas, celui-ci est sans doute le plus fou du\u2026","rel":"","context":"Dans &quot;Solutions&quot;","block_context":{"text":"Solutions","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/solutions\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/avion-supersonique.jpg?fit=1200%2C676&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/avion-supersonique.jpg?fit=1200%2C676&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/avion-supersonique.jpg?fit=1200%2C676&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/avion-supersonique.jpg?fit=1200%2C676&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/avion-supersonique.jpg?fit=1200%2C676&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":25516,"url":"https:\/\/www.laterredufutur.com\/accueil\/lavion-a-hydrogene-arrive-avec-une-autonomie-jamais-vue\/","url_meta":{"origin":6774,"position":4},"title":"L&rsquo;avion \u00e0 hydrog\u00e8ne arrive avec une autonomie jamais vue","author":"Admin","date":"20 janvier 2024","format":false,"excerpt":"La promesse d'un avenir a\u00e9ronautique durable se mat\u00e9rialise avec le nouvel eVTOL \u00e0 hydrog\u00e8ne liquide de Sirius Aviation AG. Offrant une autonomie impressionnante, ce projet suisse pourrait red\u00e9finir les voyages a\u00e9riens. L'avenir de l'aviation s'oriente vers l'hydrog\u00e8ne comme alternative \u00e9cologique aux carburants fossiles. Airbus, pionnier dans ce domaine, a annonc\u00e9\u2026","rel":"","context":"Dans &quot;Solutions&quot;","block_context":{"text":"Solutions","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/solutions\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/01\/avion-hydrogene.jpg?fit=1200%2C750&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/01\/avion-hydrogene.jpg?fit=1200%2C750&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/01\/avion-hydrogene.jpg?fit=1200%2C750&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/01\/avion-hydrogene.jpg?fit=1200%2C750&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/01\/avion-hydrogene.jpg?fit=1200%2C750&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":10131,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-nouvel-avion-supersonique-arrive-avec-ses-5000-kmh\/","url_meta":{"origin":6774,"position":5},"title":"Le nouvel avion supersonique arrive avec ses 5000 km\/h","author":"Admin","date":"19 d\u00e9cembre 2015","format":false,"excerpt":"L'arm\u00e9e am\u00e9ricaine va d\u00e9velopper un avion volant \u00e0 plus de 5000 km\/h. L'arm\u00e9e am\u00e9ricaine serait en train de d\u00e9velopper un avion hypersonique pouvant voler jusqu'\u00e0 cinq fois la vitesse du son - plus vite qu'une balle, qui se d\u00e9place g\u00e9n\u00e9ralement \u00e0 Mach 2, soit deux fois la vitesse du son.\u2026","rel":"","context":"Dans &quot;Technologie et IA&quot;","block_context":{"text":"Technologie et IA","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/technologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/12\/X-51A.jpg?fit=1024%2C749&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/12\/X-51A.jpg?fit=1024%2C749&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/12\/X-51A.jpg?fit=1024%2C749&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/12\/X-51A.jpg?fit=1024%2C749&ssl=1&resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/6774","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/comments?post=6774"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/6774\/revisions"}],"predecessor-version":[{"id":6776,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/6774\/revisions\/6776"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/6775"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=6774"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=6774"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=6774"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}