{"id":67461,"date":"2020-10-28T02:28:54","date_gmt":"2020-10-27T20:58:54","guid":{"rendered":"https:\/\/www.pranaair.com\/blog\/pm2-5-in-the-ambient-air-is-increasing\/"},"modified":"2023-02-20T17:50:41","modified_gmt":"2023-02-20T12:20:41","slug":"pm2-5-in-the-ambient-air-is-increasing","status":"publish","type":"post","link":"https:\/\/www.pranaair.com\/blog\/fr\/pm2-5-in-the-ambient-air-is-increasing\/","title":{"rendered":"Faire attention! Les PM.5 dans l&rsquo;air ambiant augmentent &#8211; Prana Air enqu\u00eate"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #161616;color:#161616\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #161616;color:#161616\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.pranaair.com\/blog\/fr\/pm2-5-in-the-ambient-air-is-increasing\/#Pourquoi_les_hivers_sont-ils_si_inconfortables_en_termes_de_pollution_particulaire\" >Pourquoi les hivers sont-ils si inconfortables en termes de pollution particulaire ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.pranaair.com\/blog\/fr\/pm2-5-in-the-ambient-air-is-increasing\/#Cela_signifie-t-il_que_blamer_Dussehra_pour_laugmentation_des_niveaux_de_pollution_a_Delhi_est_une_erreur\" >Cela signifie-t-il que bl\u00e2mer Dussehra pour l&rsquo;augmentation des niveaux de pollution \u00e0 Delhi est une erreur\u00a0?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.pranaair.com\/blog\/fr\/pm2-5-in-the-ambient-air-is-increasing\/#Et_apres\" >Et apr\u00e8s?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.pranaair.com\/blog\/fr\/pm2-5-in-the-ambient-air-is-increasing\/#Un_debut_malsain\" >Un d\u00e9but malsain<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.pranaair.com\/blog\/fr\/pm2-5-in-the-ambient-air-is-increasing\/#La_gravite_augmente\" >La gravit\u00e9 augmente<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.pranaair.com\/blog\/fr\/pm2-5-in-the-ambient-air-is-increasing\/#Un_plomb_respirant\" >Un plomb respirant<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.pranaair.com\/blog\/fr\/pm2-5-in-the-ambient-air-is-increasing\/#Helas_Pas_encore\" >H\u00e9las! Pas encore.<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.pranaair.com\/blog\/fr\/pm2-5-in-the-ambient-air-is-increasing\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<p style=\"text-align: justify;\">Avez-vous observ\u00e9 des changements dans la visibilit\u00e9 \u00e0 l&rsquo;ext\u00e9rieur derni\u00e8rement ? Ressentez-vous une irritation du nez et de la gorge lorsque vous sortez ? Vous annulez vos sorties et pr\u00e9f\u00e9rez rester \u00e0 l&rsquo;int\u00e9rieur de nos jours ? Si la r\u00e9ponse \u00e0 toutes ces questions est oui, alors vous \u00eates la proie de la pollution hivernale qui ne cesse de s&rsquo;\u00e9tendre depuis le d\u00e9but de ce mois. Son impact n&rsquo;est pas vraiment imperceptible. La concentration de PM2.5 dans l&rsquo;air ambiant est le principal coupable, et Prana Air a d\u00e9cid\u00e9 d&rsquo;enqu\u00eater comment et pourquoi !<\/p>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Pourquoi_les_hivers_sont-ils_si_inconfortables_en_termes_de_pollution_particulaire\"><\/span>Pourquoi les hivers sont-ils si inconfortables en termes de pollution particulaire ?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align: justify;\">Les niveaux de polluants atmosph\u00e9riques, comme les particules, commencent \u00e0 augmenter avec le d\u00e9but des hivers. Cela se produit en raison de la combinaison de deux ph\u00e9nom\u00e8nes &#8211; l&rsquo;inversion hivernale et le m\u00e9lange vertical.<\/p>\n<p style=\"text-align: justify;\">Diverses sources lib\u00e8rent des concentrations vari\u00e9es de contaminants atmosph\u00e9riques qui restent en suspension dans l&rsquo;air ambiant. Pendant les \u00e9t\u00e9s, l&rsquo;air dans la partie inf\u00e9rieure de l&rsquo;atmosph\u00e8re est l\u00e9ger et chaud. De ce fait, il monte facilement vers le haut et transporte ces polluants dans les couches sup\u00e9rieures suivantes. Les couches sup\u00e9rieures de l&rsquo;atmosph\u00e8re contiennent de l&rsquo;air relativement plus propre et, par cons\u00e9quent, les polluants s&rsquo;\u00e9loignent davantage du sol. C&rsquo;est ce qu&rsquo;on appelle le m\u00e9lange vertical.<\/p>\n<p style=\"text-align: justify;\">L&rsquo;inversion atmosph\u00e9rique se produit en hiver. Les conditions normales s&rsquo;inversent et l&rsquo;air pr\u00e8s de la basse atmosph\u00e8re est plus frais et plus dense. L&rsquo;air relativement plus chaud des couches sup\u00e9rieures agit donc comme un couvercle atmosph\u00e9rique. Ce couvercle emprisonne les polluants dans la couche froide et \u00e9vite leur dispersion atmosph\u00e9rique. Par cons\u00e9quent, le m\u00e9lange vertical se produit dans la couche inf\u00e9rieure elle-m\u00eame.<\/p>\n<p style=\"text-align: justify;\">A taux d&rsquo;\u00e9mission et concentration de polluants constants, plus la temp\u00e9rature est faible, plus la pollution est importante.<\/p>\n<p style=\"text-align: justify;\">\u00c0 la suite de ces \u00e9v\u00e9nements, les niveaux de pollution sont moindres en \u00e9t\u00e9 par rapport aux hivers, \u00e0 condition que les conditions spatiales et m\u00e9t\u00e9orologiques restent les m\u00eames. Vous pouvez observer un effet similaire en hiver<br \/>\nles apr\u00e8s-midi. L&rsquo;augmentation des niveaux de chaleur r\u00e9duit l\u00e9g\u00e8rement la pollution.<\/p>\n<p style=\"text-align: justify;\">Les petits matins et les nuits sont les pires. L&rsquo;impact de l&rsquo;inversion est visiblement \u00e9vident, c&rsquo;est pourquoi la qualit\u00e9 de l&rsquo;air chute pendant ces heures.<\/p>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Cela_signifie-t-il_que_blamer_Dussehra_pour_laugmentation_des_niveaux_de_pollution_a_Delhi_est_une_erreur\"><\/span>Cela signifie-t-il que bl\u00e2mer Dussehra pour l&rsquo;augmentation des niveaux de pollution \u00e0 Delhi est une erreur\u00a0?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align: justify;\">Non. Le festival de Dussehra a exacerb\u00e9 le probl\u00e8me de la pollution de l&rsquo;air dans l&rsquo;\u00c9tat.<\/p>\n<p style=\"text-align: justify;\">La qualit\u00e9 de l&rsquo;air est un attribut ambigu. De nombreux facteurs spatiaux, temporels, atmosph\u00e9riques, anthropologiques et m\u00e9t\u00e9orologiques contribuent \u00e0 la qualit\u00e9 de l&rsquo;air d&rsquo;une zone particuli\u00e8re.<\/p>\n<p style=\"text-align: justify;\">Les gens ont br\u00fbl\u00e9 des centaines d&rsquo;effigies localement, pour marquer les festivit\u00e9s du triomphe du bien sur le mal. Cependant, il a augment\u00e9 les \u00e9missions de particules. Les gens ont \u00e9galement allum\u00e9 des p\u00e9tards, ce qui a contribu\u00e9 \u00e0 la hausse soudaine des niveaux de polluants.<\/p>\n<p style=\"text-align: justify;\">De nombreuses zones de Delhi-NCR ont connu une augmentation des niveaux de pollution alors m\u00eame que la vitesse du vent &#8211; un d\u00e9terminant m\u00e9t\u00e9orologique crucial &#8211; est rest\u00e9e faible.<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Et_apres\"><\/span>Et apr\u00e8s?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">Les experts ont pr\u00e9dit que les niveaux de pollution continueront d&rsquo;augmenter au fil des jours. Ainsi, nous avons d\u00e9cid\u00e9 de lancer un suivi imm\u00e9diat de l&rsquo;information.<\/p>\n<p style=\"text-align: justify;\">La figure suivante contient les donn\u00e9es consult\u00e9es sur le site Web officiel du Central Pollution Control Board (CPCB) le 26 octobre 2020. Rohini, Delhi a \u00e9t\u00e9 saisi comme emplacement cible car cette station de surveillance \u00e9tait la plus proche de nos locaux (\u00e0 2.2 km) .<\/p>\n<p style=\"text-align: justify;\">Comme le montre la figure, les PM2.5 \u00e9taient le polluant le plus important pendant la journ\u00e9e, suivi des PM10. La concentration de PM2.5 a culmin\u00e9 aux premi\u00e8res heures de la journ\u00e9e et aux heures tardives de la nuit. Les heures du soir ont \u00e9t\u00e9 marqu\u00e9es par une tendance \u00e0 la baisse de la concentration de PM2.5.<\/p>\n<p style=\"text-align: justify;\">Nous avons \u00e9galement observ\u00e9 les concentrations en temps r\u00e9el de PM2.5 \u00e0 l&rsquo;aide de notre Pocket Monitor sur une p\u00e9riode de 12 heures tout au long de la journ\u00e9e. Nous avons photographi\u00e9 les lectures \u00e0 diff\u00e9rents intervalles temporels, \u00e0 savoir. matin, apr\u00e8s-midi, soir et nuit.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Un_debut_malsain\"><\/span>Un d\u00e9but malsain<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<figure id=\"attachment_13788\" aria-describedby=\"caption-attachment-13788\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-13788 size-full\" src=\"https:\/\/www.pranaair.com\/wp-content\/uploads\/2020\/10\/unhealthy-pm2.5-monitoring-in-delhi.jpg\" alt=\"unhealthy pm2.5 monitoring in delhi\" width=\"700\" height=\"500\" srcset=\"https:\/\/www.pranaair.com\/blog\/wp-content\/uploads\/2020\/10\/unhealthy-pm2.5-monitoring-in-delhi.jpg 700w, https:\/\/www.pranaair.com\/blog\/wp-content\/uploads\/2020\/10\/unhealthy-pm2.5-monitoring-in-delhi-300x214.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><figcaption id=\"caption-attachment-13788\" class=\"wp-caption-text\">La concentration de PM2.5 dans l&rsquo;air ambiant \u00e0 9h30.<\/figcaption><\/figure>\n<p style=\"text-align: justify;\">La premi\u00e8re lecture a \u00e9t\u00e9 chronom\u00e9tr\u00e9e \u00e0 9h30.<\/p>\n<p style=\"text-align: justify;\">La visibilit\u00e9 depuis la terrasse de notre immeuble \u00e9tait tr\u00e8s faible. La concentration de PM2.5 dans l&rsquo;air ambiant \u00e9tait de 302 microgrammes par m\u00e8tre cube. L&rsquo;air n&rsquo;\u00e9tait pas respirable et nous \u00e9tions reconnaissants envers les masques que nous portions.<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"La_gravite_augmente\"><\/span>La gravit\u00e9 augmente<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<figure id=\"attachment_13792\" aria-describedby=\"caption-attachment-13792\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-13792 size-full\" src=\"https:\/\/www.pranaair.com\/wp-content\/uploads\/2020\/10\/afternoon-pm2.5-monitoring-in-delhi.jpg\" alt=\"afternoon concentration of PM2.5 in the ambient air in Delhi\" width=\"700\" height=\"500\" srcset=\"https:\/\/www.pranaair.com\/blog\/wp-content\/uploads\/2020\/10\/afternoon-pm2.5-monitoring-in-delhi.jpg 700w, https:\/\/www.pranaair.com\/blog\/wp-content\/uploads\/2020\/10\/afternoon-pm2.5-monitoring-in-delhi-300x214.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><figcaption id=\"caption-attachment-13792\" class=\"wp-caption-text\">La concentration de PM2.5 dans l&rsquo;air ambiant \u00e0 12h30.<\/figcaption><\/figure>\n<p style=\"text-align: justify;\">We took the second reading at 12:30 p.m.<\/p>\n<p style=\"text-align: justify;\">La visibilit\u00e9 s&rsquo;\u00e9tait d\u00e9t\u00e9rior\u00e9e. La concentration de PM2.5 dans l&rsquo;air ambiant \u00e9tait de 368 microgrammes par m\u00e8tre cube. Nous avons commenc\u00e9 \u00e0 manquer \u00e0 l&rsquo;int\u00e9rieur d\u00e8s que nous sommes sortis. D\u00e8s que nous avons fini, nous nous sommes pr\u00e9cipit\u00e9s \u00e0 l&rsquo;int\u00e9rieur.<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Un_plomb_respirant\"><\/span>Un plomb respirant<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<figure id=\"attachment_13795\" aria-describedby=\"caption-attachment-13795\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-13795 size-full\" src=\"https:\/\/www.pranaair.com\/wp-content\/uploads\/2020\/10\/evening-pm2.5-monitoring-in-delhi.jpg\" alt=\"Evening concentration of PM2.5 in the ambient air in Delhi\" width=\"700\" height=\"500\" srcset=\"https:\/\/www.pranaair.com\/blog\/wp-content\/uploads\/2020\/10\/evening-pm2.5-monitoring-in-delhi.jpg 700w, https:\/\/www.pranaair.com\/blog\/wp-content\/uploads\/2020\/10\/evening-pm2.5-monitoring-in-delhi-300x214.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><figcaption id=\"caption-attachment-13795\" class=\"wp-caption-text\">La concentration de PM2.5 dans l&rsquo;air ambiant \u00e0 17h30.<\/figcaption><\/figure>\n<p style=\"text-align: justify;\">La soir\u00e9e a litt\u00e9ralement apport\u00e9 une bouff\u00e9e d&rsquo;air frais.<\/p>\n<p style=\"text-align: justify;\">Nous avons pris la lecture \u00e0 17h30. L&rsquo;air \u00e9tait meilleur que ce que nous respirions depuis le matin. La vue \u00e9tait moyennement visible. La concentration de PM2.5 dans l&rsquo;air ambiant \u00e9tait de 90 microgrammes par m\u00e8tre cube.<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Helas_Pas_encore\"><\/span>H\u00e9las! Pas encore.<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<figure id=\"attachment_13796\" aria-describedby=\"caption-attachment-13796\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-13796 size-full\" src=\"https:\/\/www.pranaair.com\/wp-content\/uploads\/2020\/10\/night-pm2.5-monitoring-in-Delhi.jpg\" alt=\"Night concentration of PM2.5 in the ambient air in Delhi\" width=\"700\" height=\"500\" srcset=\"https:\/\/www.pranaair.com\/blog\/wp-content\/uploads\/2020\/10\/night-pm2.5-monitoring-in-Delhi.jpg 700w, https:\/\/www.pranaair.com\/blog\/wp-content\/uploads\/2020\/10\/night-pm2.5-monitoring-in-Delhi-300x214.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><figcaption id=\"caption-attachment-13796\" class=\"wp-caption-text\">La concentration de PM2.5 dans l&rsquo;air ambiant \u00e0 21h30.<\/figcaption><\/figure>\n<p style=\"text-align: justify;\">Nous avons pris la derni\u00e8re lecture \u00e0 21h30.<\/p>\n<p style=\"text-align: justify;\">La concentration de PM2.5 dans l&rsquo;air ambiant \u00e9tait de 290 microgrammes par m\u00e8tre cube.<\/p>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align: justify;\">Toutes les lectures \u00e9taient plus ou moins synchronis\u00e9es avec les donn\u00e9es du site Web du CPCB.<\/p>\n<p style=\"text-align: justify;\">La situation est pr\u00e9occupante. Nous ne pouvons pas contr\u00f4ler le ph\u00e9nom\u00e8ne d&rsquo;inversion hivernale. Cependant, nous devons prendre des mesures imm\u00e9diates pour limiter les facteurs que nous pouvons &#8211; les \u00e9missions.<\/p>\n<p style=\"text-align: justify;\">Nous devons surveiller et contr\u00f4ler le taux de nos \u00e9missions qui peuvent augmenter les concentrations de polluants dans l&rsquo;atmosph\u00e8re.<\/p>\n<p style=\"text-align: justify;\">La saison des f\u00eates approche \u00e0 grands pas. Nous devons nous assurer que nous c\u00e9l\u00e9brons d&rsquo;une mani\u00e8re qui n&rsquo;aggrave pas la situation de pollution.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Avez-vous observ\u00e9 des changements dans la visibilit\u00e9 \u00e0 l&rsquo;ext\u00e9rieur derni\u00e8rement ? Ressentez-vous une irritation du nez et de la gorge&hellip;<\/p>\n","protected":false},"author":6,"featured_media":27987,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[311,495,312],"tags":[590,327,591,592,593,594],"class_list":["post-67461","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-air-pollution-fr","category-article-fr","category-outdoor-air-quality-fr","tag-air-contaminants-fr","tag-air-pollution-fr","tag-air-pollution-in-delhi-fr","tag-air-quality-fr","tag-delhi-pollution-fr","tag-outdoor-air-pollution-fr"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.9 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Faire attention! 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