{"id":9466,"date":"2018-09-27T14:32:43","date_gmt":"2018-09-27T14:32:43","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=9466"},"modified":"2018-10-17T08:33:59","modified_gmt":"2018-10-17T08:33:59","slug":"tucson-la-ville-qui-fait-baisser-la-pollution-lumineuse","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/09\/27\/tucson-la-ville-qui-fait-baisser-la-pollution-lumineuse\/","title":{"rendered":"Tucson, la ville qui fait baisser la pollution lumineuse"},"content":{"rendered":"

En faisant baisser la pollution lumineuse tout en modernisant son \u00e9clairage, la ville de Tucson donne de l’espoir \u00e0 ceux qui d\u00e9fendent le ciel nocturne.<\/strong><\/p>\n

Avec pr\u00e8s d’un million d’habitants, la ville am\u00e9ricaine de Tucson est la seconde agglom\u00e9ration (derri\u00e8re Ph\u0153nix) de l’\u00e9tat d’Arizona qui en compte sept millions. Autant dire que son \u00e9clairage a un impact majeur sur le ciel \u00e9toil\u00e9 d’une r\u00e9gion o\u00f9 l’astronomie est tr\u00e8s pr\u00e9sente : l’Observatoire de Kitt Peak<\/a> se situe \u00e0 une cinquantaine de kilom\u00e8tres au SUD-OUEST de l’agglom\u00e9ration et l’Observatoire du mont Lemmon<\/a> (qui fait partie du Catalina Sky Survey<\/em><\/a>, le r\u00e9seau de surveillance des ast\u00e9ro\u00efdes qui s’approchent un peu trop pr\u00e8s de la Terre) est \u00e0 moins de 30 kilom\u00e8tres au NORD-EST.<\/p>\n

\"\"<\/a>
L’\u00e9clairage urbain est \u00e0 l’origine d’une pollution lumineuse galopante. \u00a9 Sriram Murali<\/figcaption><\/figure>\n

Autant dire que la modernisation de l’\u00e9clairage de la ville et l’apparition massive des lampes \u00e0 Led avait de quoi inqui\u00e9ter les astronomes. Bonne nouvelle : la pollution lumineuse<\/a> a diminu\u00e9 en trois ans.<\/p>\n

L’\u00e9quipe de John Barentine (de l’International Dark-Sky Association<\/em><\/a>) a pr\u00e9sent\u00e9 dans un\u00a0r\u00e9cent article<\/a>\u00a0le r\u00e9sultat des mesures de luminosit\u00e9 du ciel nocturne qu’elle a r\u00e9alis\u00e9es en 2014 et 2017 sur 15 sites dans et autour de Tucson, p\u00e9riode au cours de laquelle un peu moins de 20.000 points d’\u00e9clairage ont \u00e9t\u00e9 remplac\u00e9s par des lampes \u00e0 Led. Sensible \u00e0 la pr\u00e9sence des observatoires astronomiques (qui ont aussi un r\u00f4le dans l’\u00e9conomie de la r\u00e9gion) la ville de Tucson semble avoir r\u00e9ussi son pari puisqu’on note une baisse de 7% de la pollution lumineuse entre 2014 et 2017.<\/p>\n

Pour John Barentine c’est la preuve qu’une ville peut se d\u00e9velopper tout en r\u00e9duisant ses nuisances lumineuses, \u00e0 condition qu’elle ne soit pas victime de “l’effet rebond” : avec l’apparition des lampes \u00e0 Led moins gourmandes en \u00e9lectricit\u00e9, certaines communes profitent des \u00e9conomies r\u00e9alis\u00e9es pour investir dans de nouveaux \u00e9clairages, aggravant ainsi la pollution lumineuse !<\/p>\n

Rappelons enfin que selon l’Inserm<\/a> l’utilisation des lampes \u00e0 Led pourrait s’av\u00e9rer nocive pour les yeux et acc\u00e9l\u00e9rer\u00a0le d\u00e9veloppement de la d\u00e9g\u00e9n\u00e9rescence maculaire li\u00e9e \u00e0 l\u2019\u00e2ge (DMLA).<\/p>\n","protected":false},"excerpt":{"rendered":"

En faisant baisser la pollution lumineuse tout en modernisant son \u00e9clairage, la ville de Tucson donne de l’espoir \u00e0 ceux qui d\u00e9fendent le ciel nocturne. Avec pr\u00e8s d’un million d’habitants, la ville am\u00e9ricaine de Tucson est la seconde agglom\u00e9ration (derri\u00e8re Ph\u0153nix) de l’\u00e9tat d’Arizona qui en compte sept millions. Autant dire que son \u00e9clairage a … Continuer la lecture de Tucson, la ville qui fait baisser la pollution lumineuse<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":8021,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[748,2176,1808,1498,1355,167,1501],"class_list":["post-9466","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-arizona","tag-catalina-sky-survey","tag-lampe-a-led","tag-observatoire-de-kitt-peak","tag-observatoire-du-mont-lemmon","tag-pollution-lumineuse","tag-tucson"],"yoast_head":"\nTucson, la ville qui fait baisser la pollution lumineuse<\/title>\n<meta name=\"description\" content=\"En faisant baisser la pollution lumineuse tout en modernisant son \u00e9clairage, la ville de Tucson donne de l'espoir \u00e0 ceux qui d\u00e9fendent le ciel 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