{"id":4465,"date":"2017-05-08T18:47:56","date_gmt":"2017-05-08T10:47:56","guid":{"rendered":"https:\/\/smartairfilters.com\/?p=4465"},"modified":"2020-07-20T13:37:34","modified_gmt":"2020-07-20T05:37:34","slug":"north-wind-lowers-beijing-pollution","status":"publish","type":"post","link":"https:\/\/smartairfilters.com\/en\/blog\/north-wind-lowers-beijing-pollution\/","title":{"rendered":"Beijing Air Pollution Drops With Northern Wind, Worsens With Southern Wind"},"content":{"rendered":"<p>A new analysis of pollution data shows that wind strongly affects Beijing&#8217;s PM2.5. The data shows that the best air pollution happens when there are northern winds.<\/p>\n<p>Why would northern winds help? North of Beijing is home to sparsely populated Inner Mongolia.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-4466 size-full aligncenter\" src=\"https:\/\/smartairfilters.com\/wordpress\/wp-content\/uploads\/2017\/05\/Shanghai-wind-2.png\" alt=\"\" width=\"332\" height=\"227\" srcset=\"https:\/\/smartairfilters.com\/wordpress\/wp-content\/uploads\/2017\/05\/Shanghai-wind-2.png 332w, https:\/\/smartairfilters.com\/wordpress\/wp-content\/uploads\/2017\/05\/Shanghai-wind-2-300x205.png 300w\" sizes=\"(max-width: 332px) 100vw, 332px\" \/><\/p>\n<p>Thus, <a href=\"https:\/\/smartairfilters.com\/en\/blog\/pm10-pm2-5-difference-particle-air-pollution\/\">PM2.5<\/a> in China&#8217;s capital tends to drop when the wind blows from the north and northwest (left side of the graph).<\/p>\n<p><img decoding=\"async\" class=\"wp-image-4467 size-full aligncenter\" src=\"https:\/\/smartairfilters.com\/wordpress\/wp-content\/uploads\/2017\/05\/Pollution-in-Beijing.png\" alt=\"\" width=\"564\" height=\"410\" srcset=\"https:\/\/smartairfilters.com\/wordpress\/wp-content\/uploads\/2017\/05\/Pollution-in-Beijing.png 564w, https:\/\/smartairfilters.com\/wordpress\/wp-content\/uploads\/2017\/05\/Pollution-in-Beijing-300x218.png 300w\" sizes=\"(max-width: 564px) 100vw, 564px\" \/><\/p>\n<p>Meanwhile, when wind comes from the south or east, PM2.5 tends to be above long-term averages. These northern winds help explain why rain\u00a0<strong>seems\u00a0<\/strong>to clear out pollution, but <a href=\"https:\/\/smartairfilters.com\/en\/blog\/rain-washes-away-pollution\/\">actually has almost no effect<\/a>.<\/p>\n<p>Special thanks to Calvin Quek (Twitter <a href=\"https:\/\/twitter.com\/clearroads\">@clearroads<\/a>), who did\u00a0the original\u00a0analysis.<\/p>","protected":false},"excerpt":{"rendered":"<p>A new analysis of pollution data shows that wind strongly affects Beijing&#8217;s PM2.5. The data shows that the best air pollution happens when there are northern winds. Why would northern winds help? North of Beijing is home to sparsely populated Inner Mongolia. Thus, PM2.5 in China&#8217;s capital tends to drop &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Beijing Air Pollution Drops With Northern Wind, Worsens With Southern Wind\" class=\"read-more button\" href=\"https:\/\/smartairfilters.com\/en\/blog\/north-wind-lowers-beijing-pollution\/#more-4465\" aria-label=\"Read more about Beijing Air Pollution Drops With Northern Wind, Worsens With Southern Wind\">Read more<\/a><\/p>\n","protected":false},"author":2295,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","footnotes":""},"categories":[17,261],"tags":[272,75,74,201],"class_list":["post-4465","post","type-post","status-publish","format-standard","hentry","category-air-pollution","category-weather","tag-air-pollution","tag-beijing","tag-pm2-5","tag-wind"],"acf":[],"_links":{"self":[{"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/posts\/4465","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/users\/2295"}],"replies":[{"embeddable":true,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/comments?post=4465"}],"version-history":[{"count":4,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/posts\/4465\/revisions"}],"predecessor-version":[{"id":11500,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/posts\/4465\/revisions\/11500"}],"wp:attachment":[{"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/media?parent=4465"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/categories?post=4465"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/tags?post=4465"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}