{"id":1511,"date":"2019-06-14T14:33:16","date_gmt":"2019-06-14T12:33:16","guid":{"rendered":"https:\/\/ecobrumi.fr\/?p=1511"},"modified":"2019-06-14T14:33:17","modified_gmt":"2019-06-14T12:33:17","slug":"les-changements-climatiques-causes-par-lhomme-ont-joue-un-role-limite-dans-la-conference-aerienne-de-beijing-en-2013","status":"publish","type":"post","link":"https:\/\/ecobrumi.fr\/?p=1511","title":{"rendered":"Les changements climatiques caus\u00e9s par l&#39;homme ont jou\u00e9 un r\u00f4le limit\u00e9 dans la \u00abconf\u00e9rence a\u00e9rienne\u00bb de Beijing en 2013"},"content":{"rendered":"<p><\/p>\n<div>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/3c1703fe8d.site.internapcdn.net\/newman\/csz\/news\/tmb\/2019\/humancausedc.jpg\" data-src=\"https:\/\/3c1703fe8d.site.internapcdn.net\/newman\/gfx\/news\/2019\/humancausedc.jpg\" data-sub-html=\"Heavy air pollution has resulted in widespread smog. These photographs, taken in August 2005, show the variations in Beijing's air quality. Credit: Bobak Ha'Eri\">\n<figure class=\"article-img\"><figcaption class=\"text-darken text-low-up text-truncate-js mt-3\">\n<p>                La forte pollution atmosph\u00e9rique a entra\u00een\u00e9 un smog g\u00e9n\u00e9ralis\u00e9. Ces photographies, prises en ao\u00fbt 2005, montrent les variations de la qualit\u00e9 de l&#39;air \u00e0 Beijing. Cr\u00e9dit: Bobak Ha&#39;Eri<br \/>\n            <\/figcaption><\/figure>\n<\/div>\n<\/div>\n<p>En janvier 2013, une brume suffocante et empoisonn\u00e9e a travers\u00e9 P\u00e9kin pendant quatre jours. Les niveaux record de particules fines dans l&#39;air ont provoqu\u00e9 la fermeture des a\u00e9roports et des milliers de quintes de toux, poussant les citoyens \u00e0 s&#39;\u00e9touffer \u00e0 chercher des soins hospitaliers.<\/p>\n<section class=\"article-banner first-banner\"><!-- \/4988204\/Phys_Story_InText_Box --><br \/>\n      <\/section>\n<\/p>\n<p>Bien que les particules qui ont rempli le ciel d&#39;hiver r\u00e9sultent d&#39;\u00e9missions humaines et naturelles, une nouvelle \u00e9tude de la Northwestern University conclut que les changements climatiques caus\u00e9s par l&#39;homme n&#39;ont jou\u00e9 qu&#39;un r\u00f4le mineur dans la stagnation de l&#39;air.<\/p>\n<p>L&#39;\u00e9tude, qui a utilis\u00e9 des simulations informatiques du climat, est l&#39;une des premi\u00e8res \u00e0 lier un \u00e9pisode de qualit\u00e9 de l&#39;air au changement climatique caus\u00e9 par l&#39;homme. Ce type de recherche fait partie du sous-domaine croissant de la science du climat appel\u00e9 &quot;d\u00e9tection et attribution d&#39;\u00e9v\u00e9nements extr\u00eames&quot;, qui \u00e9value comment les \u00e9missions humaines de gaz \u00e0 effet de serre peuvent avoir contribu\u00e9 \u00e0 la survenue et \/ ou \u00e0 la gravit\u00e9 d&#39;un \u00e9v\u00e9nement particuli\u00e8rement impactant.<\/p>\n<p>&quot;En r\u00e8gle g\u00e9n\u00e9rale, les travaux de d\u00e9tection et d&#39;attribution d&#39;\u00e9v\u00e9nements uniques sont effectu\u00e9s sur des \u00e9v\u00e9nements climatiques extr\u00eames&quot; charismatiques &quot;, tels que les ouragans, les vagues de chaleur et les s\u00e9cheresses. Nous effectuons ici l&#39;analyse sur quelque chose de moins glamour, l&#39;air au-dessus de Beijing&quot;, a d\u00e9clar\u00e9 Daniel Horton, du Nord-Ouest, de Northwestern l&#39;auteur principal de l&#39;\u00e9tude. &quot;Notre travail applique les m\u00e9thodes de d\u00e9tection et d&#39;attribution \u00e0 un ph\u00e9nom\u00e8ne m\u00e9t\u00e9orologique moins prestigieux et pourtant tr\u00e8s impactant, en particulier pour la sant\u00e9 publique.&quot;<\/p>\n<p>La brume persistante &#8211; qui a \u00e9t\u00e9 la signature de \u00abl&#39;airpocalypse\u00bb de Beijing en 2013 et d&#39;autres \u00e9v\u00e9nements li\u00e9s au smog &#8211; n\u00e9cessite deux facteurs: l&#39;\u00e9mission de polluants et l&#39;air toujours qui permet \u00e0 ces polluants de se former. Les centrales \u00e9lectriques au charbon de Beijing et 5 millions de v\u00e9hicules \u00e0 moteur sont responsables de la majeure partie de la pollution de la ville. Horton et son auteur principal Christopher Callahan avaient pour objectif de d\u00e9terminer si le changement climatique caus\u00e9 par l\u2019homme avait jou\u00e9 un r\u00f4le dans les conditions m\u00e9t\u00e9orologiques qui ont conduit \u00e0 l\u2019immobilit\u00e9 des ondes.<\/p>\n<p>&quot;Bien que nous ayons constat\u00e9 \u00e0 ce jour que le changement climatique n&#39;avait pas eu d&#39;influence majeure sur la qualit\u00e9 de l&#39;air en hiver \u00e0 Beijing, ce travail ajoute une certaine diversit\u00e9 m\u00e9t\u00e9orologique aux r\u00e9cents examens des liens entre le changement climatique et les \u00e9v\u00e9nements extr\u00eames individuels&quot;, a d\u00e9clar\u00e9 Callahan, ancien \u00e9tudiant de premier cycle. dans le laboratoire de Horton, qui a dirig\u00e9 la recherche.<\/p>\n<p>L\u2019\u00e9tude sera publi\u00e9e le 30 avril dans la <i>Journal of Geophysical Research: Atmosph\u00e8res<\/i>. Horton est professeur adjoint de sciences de la Terre et des plan\u00e8tes au Weinberg College of Arts and Sciences de Northwestern. Callahan est actuellement titulaire d&#39;un doctorat. Candidat en g\u00e9ographie au Dartmouth College, o\u00f9 il \u00e9tudie la mod\u00e9lisation du climat et ses impacts.<\/p>\n<p>Pour explorer les conditions m\u00e9t\u00e9orologiques sous-jacentes \u00e0 l\u2019airpocalypse, l\u2019\u00e9quipe a compar\u00e9 les simulations climatiques: une s\u00e9rie d\u2019exp\u00e9riences sur mod\u00e8les incluait la tendance actuelle des changements climatiques caus\u00e9s par l\u2019homme et une autre comme si le changement climatique n\u2019avait pas \u00e9t\u00e9 provoqu\u00e9 par l\u2019homme. Les chercheurs ont constat\u00e9 que, dans les deux sc\u00e9narios, il existait toujours des conditions m\u00e9t\u00e9orologiques propices \u00e0 une mauvaise qualit\u00e9 de l&#39;air \u00e0 Beijing.<\/p>\n<p>Les simulations ont toutefois indiqu\u00e9 que si le changement climatique caus\u00e9 par l&#39;homme persistait dans la m\u00eame tendance, il pourrait en r\u00e9sulter des ph\u00e9nom\u00e8nes de qualit\u00e9 de l&#39;air plus extr\u00eames. Selon l&#39;Organisation mondiale de la sant\u00e9, la pollution de l&#39;air a d\u00e9j\u00e0 caus\u00e9 4,2 millions de d\u00e9c\u00e8s dans le monde. Bon nombre de ces d\u00e9c\u00e8s r\u00e9sultent de maladies respiratoires, de maladies cardiaques ou d&#39;accidents vasculaires c\u00e9r\u00e9braux li\u00e9s \u00e0 la pollution.<\/p>\n<p>&quot;Nous avons constat\u00e9 que le changement climatique n&#39;\u00e9tait pas le facteur le plus important dans la qualit\u00e9 de l&#39;air au cours des derniers hivers de Beijing. Les fluctuations atmosph\u00e9riques naturelles ont conduit \u00e0 une d\u00e9gradation de la qualit\u00e9 de l&#39;air&quot;, a d\u00e9clar\u00e9 Callahan. &quot;Cependant, nous avons trouv\u00e9 une petite empreinte digitale humaine qui pourrait augmenter dans le futur.&quot;<\/p>\n<p>M\u00eame si les \u00e9missions humaines de gaz \u00e0 effet de serre n&#39;ont jou\u00e9 qu&#39;un r\u00f4le mineur dans les \u00e9v\u00e9nements de mauvaise qualit\u00e9 de l&#39;air hivernaux de Beijing, Callahan affirme que les humains peuvent am\u00e9liorer consid\u00e9rablement la qualit\u00e9 de l&#39;air en r\u00e9duisant les \u00e9missions de polluants atmosph\u00e9riques. Ces r\u00e9ductions co\u00efncident souvent avec les r\u00e9ductions de gaz \u00e0 effet de serre. Ainsi, non seulement les r\u00e9ductions contribueraient \u00e0 limiter le changement climatique mondial, mais elles auraient \u00e9galement l&#39;avantage d&#39;\u00eatre assainies et de r\u00e9duire le nombre de maladies li\u00e9es \u00e0 la pollution.<\/p>\n<p>&quot;L&#39;att\u00e9nuation du changement climatique, \u00e0 la base, n\u00e9cessite des r\u00e9ductions d&#39;\u00e9missions de gaz \u00e0 effet de serre&quot;, a-t-il d\u00e9clar\u00e9. &quot;Si nous pouvons le faire tout en r\u00e9duisant les \u00e9missions de polluants, c&#39;est gagnant-gagnant.&quot;\n                                                                                                                        <\/p>\n<hr\/>\n<div class=\"article-main__explore my-4 d-print-none\">\n<p>                                            L&#39;adoption de v\u00e9hicules \u00e9lectriques am\u00e9liore la qualit\u00e9 de l&#39;air et les perspectives climatiques\n\t\t\t\t\t\t\t\t\t\t<\/p><\/div>\n<hr class=\"mb-4\"\/>\n<div class=\"article-main__more p-4\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<strong>Plus d&#39;information:<\/strong><br \/>\n\t\t\t\t\t\t\t\t\t\t\t\tC.W. Callahan et al., Attribution multi-index de la qualit\u00e9 de l&#39;air extr\u00eame en hiver \u00e0 Beijing, Chine, <i>Journal of Geophysical Research: Atmosph\u00e8res<\/i> (2019). DOI: 10.1029 \/ 2018JD029738<\/p><\/div>\n<div class=\"d-inline-block text-medium my-4\">\n<p>\t\t\t\t\t\t\t\t\t\t\t\tFourni par<br \/>\nUniversit\u00e9 du nord-ouest<br \/>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"icon_open\" href=\"http:\/\/www.northwestern.edu\/\" target=\"_blank\" rel=\"nofollow noopener noreferrer\"><br \/>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<svg><use href=\"https:\/\/cf3e497594.site.internapcdn.net\/tmpl\/v6\/img\/svg\/sprite.svg#icon_open\" x=\"0\" y=\"0\"\/><\/svg><\/a><\/p><\/div>\n<p>                                        <!-- print only --><\/p>\n<div class=\"d-none d-print-block\">\n<p>\n                                                 <strong>Citation<\/strong>:<br \/>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Les changements climatiques caus\u00e9s par l&#39;homme ont jou\u00e9 un r\u00f4le limit\u00e9 dans la \u00abconf\u00e9rence a\u00e9rienne\u00bb de Beijing en 2013 (25 avril 2019)<br \/>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0r\u00e9cup\u00e9r\u00e9 le 14 juin 2019<br \/>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0sur https:\/\/phys.org\/news\/2019-04-human-caused-climate-limited-role-beijing.html\n                                            <\/p>\n<p>                                            Ce document est soumis au droit d&#39;auteur. Mis \u00e0 part toute utilisation \u00e9quitable \u00e0 des fins d\u2019\u00e9tude ou de recherche priv\u00e9e, aucun<br \/>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0partie peut \u00eatre reproduite sans autorisation \u00e9crite. Le contenu est fourni seulement pour information.\n                                            <\/p>\n<\/p><\/div>\n<\/p><\/div>\n<p><script id=\"facebook-jssdk\" async=\"\" src=\"http:\/\/connect.facebook.net\/en_US\/sdk.js\"><\/script><\/pre>\n","protected":false},"excerpt":{"rendered":"<div class=\"mh-excerpt\"><p>La forte pollution atmosph\u00e9rique a entra\u00een\u00e9 un smog g\u00e9n\u00e9ralis\u00e9. Ces photographies, prises en ao\u00fbt 2005, montrent les variations de la qualit\u00e9 de l&#39;air \u00e0 Beijing. <a class=\"mh-excerpt-more\" href=\"https:\/\/ecobrumi.fr\/?p=1511\" title=\"Les changements climatiques caus\u00e9s par l&#039;homme ont jou\u00e9 un r\u00f4le limit\u00e9 dans la \u00abconf\u00e9rence a\u00e9rienne\u00bb de Beijing en 2013\">[&#8230;]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":1512,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1511","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-classe"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Les changements climatiques caus\u00e9s par l&#039;homme ont jou\u00e9 un r\u00f4le limit\u00e9 dans la \u00abconf\u00e9rence a\u00e9rienne\u00bb de Beijing en 2013 - Ecobrumi<\/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:\/\/ecobrumi.fr\/?p=1511\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les changements climatiques caus\u00e9s par l&#039;homme ont jou\u00e9 un r\u00f4le limit\u00e9 dans la \u00abconf\u00e9rence a\u00e9rienne\u00bb de Beijing en 2013 - Ecobrumi\" \/>\n<meta property=\"og:description\" content=\"La forte pollution atmosph\u00e9rique a entra\u00een\u00e9 un smog g\u00e9n\u00e9ralis\u00e9. 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