{"id":77851,"date":"2023-06-06T01:00:03","date_gmt":"2023-06-06T01:00:03","guid":{"rendered":"https:\/\/enterpriseam.com\/climate\/2023\/06\/06\/increased-co2-is-warming-our-climate-but-cooling-the-upper-atmosphere\/"},"modified":"2023-06-06T01:00:03","modified_gmt":"2023-06-06T01:00:03","slug":"increased-co2-is-warming-our-climate-but-cooling-the-upper-atmosphere","status":"publish","type":"post","link":"https:\/\/enterpriseam.com\/climate\/2023\/06\/06\/increased-co2-is-warming-our-climate-but-cooling-the-upper-atmosphere\/","title":{"rendered":"Increased CO2 is warming our climate, but cooling the upper atmosphere"},"content":{"rendered":"<p><a class=\"content-anchor\" id=\"tldr-story-08\"><\/a><strong> The middle and upper stratosphere \u2014 the second lowest layer in the atmosphere <\/strong><strong>\u2014 is cooling dramatically because of rising CO2 levels<\/strong>, <a href=\"https:\/\/e360.yale.edu\/features\/climate-change-upper-atmosphere-cooling\">Yale Environment 360<\/a> said, citing a study published last month in the journal PNAS by pioneering climate modeler Ben Santer. The study used new satellite data to build on another recent study that illustrated how the mesosphere and lower thermosphere \u2014 the layers above the stratosphere \u2014 cooled by 1.7\u00b0C. The research estimated that by the end of the century, these zones would cool by 7.5\u00b0C, two to three times faster than the average warming expected at ground level.<\/p>\n<p><strong>How does the upper atmosphere get colder?<\/strong> The heat that we emit does not all stay in the troposphere \u2014 the lowest layer of the atmosphere, Yale Environment explains. When the heat spreads upwards, it escapes into space, which, combined with the trapping of heat in the lower atmosphere, results in a rapid cooling of the upper layers. The cooling of the upper air also causes it to contract. One study found that the depth of the stratosphere has diminished by about 1% since 1980, and another found that the mesosphere and lower thermosphere contracted by almost 1.3 km between 2002 and 2019.<\/p>\n<p><strong>Why this matters: <\/strong>This contraction means the upper atmosphere is becoming less dense, which in turn reduces drag on satellites and other objects in low orbit, causing space junk \u2014 bits of equipment of various sorts left behind in orbit \u2014 to stick around longer and increases the risk of collisions with satellites.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The middle and upper stratosphere \u2014 the second lowest layer in the atmosphere \u2014 is cooling dramatically because of rising CO2 levels, Yale Environment 360 said, citing a study published last month in the journal PNAS by pioneering climate modeler Ben Santer. The study used new satellite data to build on another recent study that [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":77852,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"newspack_ads_suppress_ads":false,"newspack_popups_has_disabled_popups":false,"newspack_sponsor_sponsorship_scope":"","newspack_sponsor_native_byline_display":"inherit","newspack_sponsor_native_category_display":"inherit","newspack_sponsor_underwriter_style":"inherit","newspack_sponsor_underwriter_placement":"inherit","ep_exclude_from_search":false,"_primary_brand":0,"newspack_featured_image_position":"","newspack_post_subtitle":"","newspack_article_summary_title":"Overview:","newspack_article_summary":"","newspack_hide_updated_date":false,"newspack_show_updated_date":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[75],"tags":[1122,57,11,73],"brand":[],"newspack_spnsrs_tax":[],"class_list":["post-77851","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-on-your-way-out","tag-carbon-footprint","tag-climate-change","tag-enterpriseclimate","tag-on-your-way-out","wpautop","entry"],"acf":{"mongo_id":"c8c6b63e-c962-4d33-84db-3721d6ca4870","is_powered_by":true,"story_type":"1","photo_url":"https:\/\/ent.news\/2023\/4\/1043.jpg","photo_position":"above","related_issue":[77829],"teaser":"","voice_url":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.1 (Yoast SEO v27.1.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Increased CO2 is warming our climate, but cooling the upper atmosphere - Climate<\/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:\/\/enterpriseam.com\/climate\/2023\/06\/06\/increased-co2-is-warming-our-climate-but-cooling-the-upper-atmosphere\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Increased CO2 is warming our climate, but cooling the upper atmosphere\" \/>\n<meta property=\"og:description\" content=\"The middle and upper stratosphere \u2014 the second lowest layer in the atmosphere \u2014 is cooling dramatically because of rising CO2 levels, Yale Environment 360 said, citing a study published last month in the journal PNAS by pioneering climate modeler Ben Santer. The study used new satellite data to build on another recent study that [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/enterpriseam.com\/climate\/2023\/06\/06\/increased-co2-is-warming-our-climate-but-cooling-the-upper-atmosphere\/\" \/>\n<meta property=\"og:site_name\" content=\"Climate\" \/>\n<meta property=\"article:published_time\" content=\"2023-06-06T01:00:03+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/i0.wp.com\/ent.news\/2023\/4\/1043.jpg?fit=%2C&ssl=1\" \/>\n<meta name=\"author\" content=\"enterpriseam admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"enterpriseam admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/enterpriseam.com\/climate\/2023\/06\/06\/increased-co2-is-warming-our-climate-but-cooling-the-upper-atmosphere\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/enterpriseam.com\/climate\/2023\/06\/06\/increased-co2-is-warming-our-climate-but-cooling-the-upper-atmosphere\/\"},\"author\":{\"name\":\"enterpriseam admin\",\"@id\":\"https:\/\/enterpriseam.com\/climate\/#\/schema\/person\/ca597032db7e4db868359c123cec256d\"},\"headline\":\"Increased CO2 is warming our climate, but cooling the upper atmosphere\",\"datePublished\":\"2023-06-06T01:00:03+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/enterpriseam.com\/climate\/2023\/06\/06\/increased-co2-is-warming-our-climate-but-cooling-the-upper-atmosphere\/\"},\"wordCount\":255,\"publisher\":{\"@id\":\"https:\/\/enterpriseam.com\/climate\/#organization\"},\"image\":{\"@id\":\"https:\/\/enterpriseam.com\/climate\/2023\/06\/06\/increased-co2-is-warming-our-climate-but-cooling-the-upper-atmosphere\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/i0.wp.com\/ent.news\/2023\/4\/1043.jpg?fit=%2C&ssl=1\",\"keywords\":[\"carbon footprint\",\"climate change\",\"EnterpriseClimate\",\"ON YOUR WAY OUT\"],\"articleSection\":[\"ON YOUR WAY OUT\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/enterpriseam.com\/climate\/2023\/06\/06\/increased-co2-is-warming-our-climate-but-cooling-the-upper-atmosphere\/\",\"url\":\"https:\/\/enterpriseam.com\/climate\/2023\/06\/06\/increased-co2-is-warming-our-climate-but-cooling-the-upper-atmosphere\/\",\"name\":\"Increased CO2 is warming our climate, but cooling the upper atmosphere - 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