{"id":710,"date":"2009-09-08T07:22:24","date_gmt":"2009-09-08T07:22:24","guid":{"rendered":"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/2009\/09\/08\/les-emissions-de-gaz-a-effet-de-serre-indicateurs-dun-metabolisme-urbain-destructeur\/"},"modified":"2012-07-12T11:50:57","modified_gmt":"2012-07-12T11:50:57","slug":"les-emissions-de-gaz-a-effet-de-serre-indicateurs-dun-metabolisme-urbain-destructeur","status":"publish","type":"post","link":"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2009\/09\/08\/les-emissions-de-gaz-a-effet-de-serre-indicateurs-dun-metabolisme-urbain-destructeur\/","title":{"rendered":"Les \u00e9missions de gaz \u00e0 effet de serre indicateurs d&rsquo;un m\u00e9tabolisme urbain destructeur"},"content":{"rendered":"<p>&#160;&#160;&#160; Une \u00e9tude comparative des \u00e9missions de GHG de 10 grandes agglom\u00e9rations urbaines dans le monde, anim\u00e9e par C. Kennedy de l&#039;Universit\u00e9 de Toronto, tombe \u00e0 point pour illustrer le gaspillage \u00e9nerg\u00e9tique de bien des agglom\u00e9rations Nord-am\u00e9ricaines. Cette \u00e9tude montre qu&#039;il existe un facteur 5 entre les \u00e9missions de GHG par habitant entre Denver, Colorado et Barcelone (FIG.I).<\/p>\n<p><a href=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/6a00d83451b18369e20120a5ac2b6c970c-pi.jpg\"><img decoding=\"async\" alt=\"M\u00e9tabolisme urbain-CO2\" class=\"at-xid-6a00d83451b18369e20120a5ac2b6c970c \" src=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/6a00d83451b18369e20120a5ac2b6c970c-450wi.jpg\" \/><\/a>&#160; <\/p>\n<p>&#160;&#160; Denver cumule pratiquement les plus mauvaises performances sur les principaux crit\u00e8res examin\u00e9s:<\/p>\n<p>&#8211; une tr\u00e8s forte consommation d&#039;\u00e9lectricit\u00e9 provenant de centrales au charbon et donc fortement charg\u00e9e en CO<sub>2<\/sub> (792&#160;kg de CO<sub>2<\/sub> par MWh),<\/p>\n<p>-une tr\u00e8s forte consommation de fuel de chauffage, li\u00e9e aux conditions climatiques et au d\u00e9veloppement commercial et industriel,<\/p>\n<p>-une formidable consommation de carburants pour les transports individuels dans une agglom\u00e9ration tr\u00e8s \u00e9tendue \u00e0 faible densit\u00e9 de population (FIG.II). L&#039;activit\u00e9 a\u00e9roportuaire plombe \u00e9galement le bilan de pollution de cette agglom\u00e9ration.<\/p>\n<p>Pour les auteurs de cette \u00e9tude le cas de Denver n&#039;est pas exceptionnel, il&#160;est repr\u00e9sentatif de bien des m\u00e9tropoles am\u00e9ricaines.<\/p>\n<p><a href=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/6a00d83451b18369e20120a555bcae970b-pi.jpg\"><img decoding=\"async\" alt=\"M\u00e9tabolisme urbain-transport\" class=\"at-xid-6a00d83451b18369e20120a555bcae970b \" src=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/6a00d83451b18369e20120a555bcae970b-450wi.jpg\" \/><\/a> <\/p>\n<p>&#160;&#160; Cette \u00e9tude met aussi en \u00e9vidence les points forts ou les avantages naturels de certaines des villes \u00e9tudi\u00e9es, comme par exemple, le climat de Barcelone et sa forte densit\u00e9 de population ou la qualit\u00e9 de la ressource \u00e9lectrique de Gen\u00e8ve, tr\u00e8s peu charg\u00e9e en CO<sub>2<\/sub>. Elle recommande aux responsables des agglom\u00e9rations de comparer leurs performances par rapport \u00e0 celles de villes analogues. Denver gagnerait \u00e0 se comparer \u00e0 Toronto, New York \u00e0 Londres. <\/p>\n<p><a href=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/6a00d83451b18369e20120a555ce25970b-pi.jpg\"><img decoding=\"async\" alt=\"M\u00e9tabolisme urbain-GHG\" class=\"at-xid-6a00d83451b18369e20120a555ce25970b \" src=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/6a00d83451b18369e20120a555ce25970b-450wi.jpg\" \/><\/a> <\/p>\n<p>&#160;&#160;&#160; Cette \u00e9tude confirme que le mode de g\u00e9n\u00e9ration d&#039;\u00e9lectricit\u00e9 est un param\u00e8tre du premier ordre sur les \u00e9missions de CO2 des grandes villes qui regroupent plus de 50% de la population dans le monde. C&#039;est en agissant en priorit\u00e9 sur ce param\u00e8tre que pourront \u00eatre r\u00e9duites les \u00e9missions de GHG \u00e0 l&#039;horizon d&#039;une ou deux d\u00e9cennies. La r\u00e9duction radicale des consommations en carburants&#160;des v\u00e9hicules am\u00e9ricains est \u00e9galement un point tr\u00e8s important qui peut se mettre en place en deux d\u00e9cennies. Faire cro\u00eetre la densit\u00e9 de population d&#039;une agglom\u00e9ration am\u00e9ricaine demandera beaucoup plus de temps.<\/p>\n<p><a href=\"http:\/\/pubs.acs.org\/doi\/abs\/10.1021\/es900213p\" target=\"_blank\" title=\"m\u00e9tabolisme urbain\">LIRE<\/a> cette tr\u00e8s int\u00e9ressante \u00e9tude.<\/p>\n<p>Le 8 Septembre 2009.<\/p>\n<p>&#8211;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#160;&#160;&#160; Une \u00e9tude comparative des \u00e9missions de GHG de 10 grandes agglom\u00e9rations urbaines dans le monde, anim\u00e9e par C. Kennedy de l&#039;Universit\u00e9 de Toronto, tombe \u00e0 point pour illustrer le gaspillage \u00e9nerg\u00e9tique de bien des agglom\u00e9rations Nord-am\u00e9ricaines. Cette \u00e9tude montre qu&#039;il existe un facteur 5 entre les \u00e9missions de GHG par habitant entre Denver, Colorado [&hellip;]<\/p>\n","protected":false},"author":341,"featured_media":20874,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17,6],"tags":[],"class_list":["post-710","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-habitat","category-rechauffement-climatique"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Les \u00e9missions de gaz \u00e0 effet de serre indicateurs d&#039;un m\u00e9tabolisme urbain destructeur - leblogenergie.com<\/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:\/\/blogs.thesocialmedia.com\/leblogenergie\/2009\/09\/08\/les-emissions-de-gaz-a-effet-de-serre-indicateurs-dun-metabolisme-urbain-destructeur\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Les \u00e9missions de gaz \u00e0 effet de serre indicateurs d&#039;un m\u00e9tabolisme urbain destructeur - leblogenergie.com\" \/>\n<meta name=\"twitter:description\" content=\"&#160;&#160;&#160; Une \u00e9tude comparative des \u00e9missions de GHG de 10 grandes agglom\u00e9rations urbaines dans le monde, anim\u00e9e par C. 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