{"id":1846,"date":"2017-02-08T14:43:00","date_gmt":"2017-02-08T14:43:00","guid":{"rendered":"https:\/\/www.allenvi.fr\/?p=1846"},"modified":"2022-07-05T15:01:14","modified_gmt":"2022-07-05T15:01:14","slug":"la-pollution-aux-particules-vue-par-la-recherche","status":"publish","type":"post","link":"https:\/\/ist.blogs.inrae.fr\/allenvi\/la-pollution-aux-particules-vue-par-la-recherche\/","title":{"rendered":"La pollution aux particules vue par la recherche"},"content":{"rendered":"\n<p>Augustin Colette est membre du groupe Climat d\u2019AllEnvi et responsable de l\u2019unit\u00e9 Mod\u00e9lisation atmosph\u00e9rique et cartographie environnementale de l\u2019Ineris. Il revient sur les \u00e9pisodes de pollution particulaire que l\u2019hexagone vient de subir en d\u00e9cembre 2016 et janvier 2017.<\/p>\n\n\n\n<p><strong>Ces \u00e9pisodes de pollution aux particules sont-ils de plus en plus fr\u00e9quents&nbsp;?<\/strong><br><strong>Augustin Colette :<\/strong>&nbsp;Il est difficile de r\u00e9pondre pr\u00e9cis\u00e9ment faute de mesure disponible. On sait, en revanche, que le niveau moyen de pollution particulaire a baiss\u00e9 depuis une vingtaine d\u2019ann\u00e9es, m\u00eame s\u2019il reste pr\u00e9occupant. <a href=\"http:\/\/www.eea.europa.eu\/publications\/air-quality-in-europe-2013\">80 <\/a><a href=\"http:\/\/www.eea.europa.eu\/publications\/air-quality-in-europe-2013\" target=\"_blank\" rel=\"noreferrer noopener\">\u00e0 90 % des populations<\/a>&nbsp;sont encore expos\u00e9es \u00e0 des taux sup\u00e9rieurs aux seuils recommand\u00e9s par l\u2019OMS dans les villes europ\u00e9ennes. Et les impacts sanitaires demeurent tr\u00e8s inqui\u00e9tants avec, en France, <a href=\"http:\/\/www.santepubliquefrance.fr\/Accueil-Presse\/Tous-les-communiques\/Impacts-sanitaires-de-la-pollution-de-l-air-en-France-nouvelles-donnees-et-perspectives\" target=\"_blank\" rel=\"noreferrer noopener\">48 000 d\u00e9c\u00e8s pr\u00e9matur\u00e9s<\/a>&nbsp;imputables \u00e0 la pollution particulaire.<\/p>\n\n\n\n<p><strong>Quelles sont les principales causes d\u2019\u00e9mission de ces particules ?<\/strong><br><strong>A. C. :<\/strong>&nbsp;Ces \u00e9pisodes de grande ampleur tels que ceux que l\u2019on vient de vivre sont principalement imputables \u00e0 \u00e0 l\u2019agriculture (en particulier l\u2019\u00e9levage \u00e0 cette saison), au trafic routier et au chauffage r\u00e9sidentiel. Il est difficile d\u2019\u00e9tablir pr\u00e9cis\u00e9ment la contribution de chaque secteur malgr\u00e9 les d\u00e9veloppements r\u00e9cents en termes de mod\u00e8les de pr\u00e9vision et de mesures de chimie rapide (Aerosol Chemical Speciation Monitor).<\/p>\n\n\n\n<p><strong>Comment la recherche scientifique s\u2019empare-t-elle de ces probl\u00e9matiques de pollution aux particules ?<\/strong><br><strong>A. C. : <\/strong>Les questions de recherche sont nombreuses ! Au niveau des processus, c\u2019est sans doute la formation d\u2019a\u00e9rosols organiques secondaires qui mobilise le plus la communaut\u00e9 scientifique. Par exemple, les compos\u00e9s organiques semi-volatils sont \u00e9mis par le trafic et le chauffage au bois et il est encore difficile de bien les repr\u00e9senter dans les mod\u00e8les.<br>Il y a aussi des d\u00e9veloppements int\u00e9ressants sur la m\u00e9trologie des a\u00e9rosols que ce soit en laboratoire ou sur le terrain, avec l\u2019apparition d\u2019outils de chimie rapide permettant de conna\u00eetre en temps quasi r\u00e9el la composition des a\u00e9rosols.<br>Les impacts des a\u00e9rosols sont aussi un domaine d\u2019int\u00e9r\u00eat. Par exemple, leur contribution au for\u00e7age radiatif, et donc au changement climatique. Mais la question des impacts sanitaires n\u2019est pas encore compl\u00e8tement r\u00e9gl\u00e9e. S\u2019il est possible d\u2019estimer l\u2019impact global des particules, on n\u2019est pas encore capables de quantifier le r\u00f4le sanitaire de chaque compos\u00e9 (organique, inorganiques, poussi\u00e8res d\u00e9sertiques&#8230;). Cela peut freiner la d\u00e9finition de priorit\u00e9s dans les strat\u00e9gies de gestion.<\/p>\n\n\n\n<p><strong>Expliquez-nous le r\u00f4le de la <u><a href=\"http:\/\/www2.prevair.org\/\" target=\"_blank\" rel=\"noreferrer noopener\">plateforme Prev\u2019AIR<\/a><\/u>&nbsp;dans laquelle vous \u00eates impliqu\u00e9e\u2026<\/strong><br><strong>A. C. : <\/strong>Prev&rsquo;AIR est la plateforme nationale de pr\u00e9vision de la qualit\u00e9 de l\u2019air. Depuis 2003, elle diffuse quotidiennement des cartographies et des pr\u00e9visions des concentrations de polluants atmosph\u00e9riques r\u00e9glement\u00e9s, fruits de simulations num\u00e9riques et d\u2019observations recueillies sur le terrain.<br>Cette plateforme est l\u2019une des composantes du dispositif fran\u00e7ais de surveillance et de gestion de la qualit\u00e9 de l\u2019air, en compl\u00e9ment des mesures de routine des Associations agr\u00e9\u00e9es de surveillance de la qualit\u00e9 de l\u2019air (AASQA). Elle est d\u00e9velopp\u00e9e et g\u00e9r\u00e9e au quotidien par l\u2019Ineris, auquel s\u2019associent M\u00e9t\u00e9o France, le CNRS et le LCSQA (Laboratoire central de surveillance de la qualit\u00e9 de l\u2019air).<br>En 2017, les donn\u00e9es de Prev\u2019AIR vont \u00eatre disponibles en open data pour une meilleure diffusion et aussi peut \u00eatre de nouvelles utilisations.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Augustin Colette est membre du groupe Climat d\u2019AllEnvi et responsable de l\u2019unit\u00e9 Mod\u00e9lisation atmosph\u00e9rique et cartographie environnementale de l\u2019Ineris. Il revient sur les \u00e9pisodes de pollution particulaire que l\u2019hexagone vient de subir en d\u00e9cembre 2016 et janvier 2017. Ces \u00e9pisodes de pollution aux particules sont-ils de plus en plus fr\u00e9quents&nbsp;?Augustin Colette :&nbsp;Il est difficile de [&hellip;]<\/p>\n","protected":false},"author":199,"featured_media":9732,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"off","_et_pb_old_content":"","_et_gb_content_width":"","inline_featured_image":false,"footnotes":""},"categories":[22],"tags":[],"class_list":["post-1846","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nos-actualites"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>La pollution aux particules vue par la recherche - Alliance Allenvi<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La pollution aux particules vue par la recherche - Alliance Allenvi\" \/>\n<meta property=\"og:description\" content=\"Augustin Colette est membre du groupe Climat d\u2019AllEnvi et responsable de l\u2019unit\u00e9 Mod\u00e9lisation atmosph\u00e9rique et cartographie environnementale de l\u2019Ineris. Il revient sur les \u00e9pisodes de pollution particulaire que l\u2019hexagone vient de subir en d\u00e9cembre 2016 et janvier 2017. 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