{"id":259183,"date":"2023-05-26T13:29:34","date_gmt":"2023-05-26T11:29:34","guid":{"rendered":"https:\/\/climatescience.press\/?p=259183"},"modified":"2023-05-26T13:29:35","modified_gmt":"2023-05-26T11:29:35","slug":"claim-ozone-treaty-is-delaying-first-ice-free-arctic-summer","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=259183","title":{"rendered":"Claim: Ozone treaty is delaying first ice-free Arctic\u00a0summer"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n

<\/p>\n\n\n\n

From Tallbloke’s Talkshop<\/a><\/p>\n\n\n\n

\u00a0May 24, 2023 by\u00a0oldbrew<\/strong><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Sea ice optional? [image credit: BBC]<\/p>\n\n\n\n

Why has it taken so long for greenhouse gas obsessives to come up with this, using \u2018new climate model simulations\u2019? The Arctic summer sea ice was supposed to be on its last legs<\/a> at least fifteen years ago. Of course natural variation is ignored or discounted, as usual.<\/em>
\u2013 \u2013 \u2013
A 1987 global deal to protect the ozone layer is delaying the first ice-free Arctic summer by up to 15 years, new research shows.<\/p>\n\n\n\n

The Montreal Protocol \u2013 the first treaty to be ratified by every United Nations country \u2013 regulates nearly 100 man-made chemicals called ozone-depleting substances (ODSs), says EurekAlert<\/a><\/em>.<\/p>\n\n\n\n

While the main aim was to preserve the ozone layer, ODSs are also potent greenhouse gases, so the deal has slowed global warming.<\/p>\n\n\n\n

The new study shows the effects of this include delaying the first ice-free Arctic summer (currently projected to happen the middle of this century) by up to 15 years, depending on future emissions.<\/p>\n\n\n\n

The researchers \u2013 from UC Santa Cruz, Columbia University and the University of Exeter \u2013 estimate that each 1,000 tonnes of ODS emissions prevented saves about seven square kilometres of Arctic sea ice.<\/p>\n\n\n\n

\u201cWhile ODSs aren\u2019t as abundant as other greenhouse gases such as carbon dioxide, they can have a real impact on global warming,\u201d said Dr Mark England, Royal Commission for the Exhibition of 1851 senior research fellow at the University of Exeter.<\/p>\n\n\n\n

\u201cODSs have particularly powerful effects in the Arctic, and they played a major role in driving Arctic climate change in the second half of the 20th Century.<\/p>\n\n\n\n

\u201cWhile stopping these effects was not the primary goal of the Montreal Protocol, it has been a fantastic by-product.\u201d<\/p>\n\n\n\n

Dr England said opponents of the protocol predicted a range of negative consequences, most of which did not happen, and instead there are numerous documented instances of unintended climate benefits.<\/p>\n\n\n\n

Professor Lorenzo Polvani, from Columbia University, said: \u201cThe first ice-free Arctic summer \u2013 meaning the Arctic Ocean practically free of sea ice \u2013 will be a major milestone in the process of climate change.<\/p>\n\n\n\n

\u201cOur findings clearly demonstrate that the Montreal Protocol has been a very powerful climate protection treaty, and has done much more than healing the ozone hole over the South Pole.<\/p>\n\n\n\n

\u201cIts effects are being felt all over the world, especially in the Arctic.\u201d<\/p>\n\n\n\n

ODS decline<\/strong><\/p>\n\n\n\n

The study, which used new climate model simulations, shows that protection of the ozone layer itself played no part in slowing the loss of Arctic sea ice \u2013 all the benefits relate to the role of ODSs as greenhouse gases.<\/p>\n\n\n\n

ODSs (which include chlorofluorocarbons, also called CFCs) are compounds developed in the last century for industrial use as refrigerants and propellants.<\/p>\n\n\n\n

The Montreal Protocol, which has now been signed by all 198 members of United Nations, regulated these compounds to preserve the ozone layer, which protects humans and the environment from harmful levels of ultraviolet radiation.<\/p>\n\n\n\n

This effort has succeeded, with atmospheric concentrations of ODSs declining since the mid-1990s and signs that the ozone layer has started to heal.<\/p>\n\n\n\n

However, research has suggested a slight rise in ODS concentrations from 2010-20, so Dr England said vigilance is still required.<\/p>\n\n\n\n

Full article here<\/a><\/em>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Why has it taken so long for greenhouse gas obsessives to come up with this, using \u2018new climate model simulations\u2019? The Arctic summer sea ice was supposed to be\u00a0on its last legs\u00a0at least fifteen years ago. Of course natural variation is ignored or discounted, as usual.<\/p>\n","protected":false},"author":121246920,"featured_media":259189,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_crdt_document":"","advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[691819750,691818056,691818153,691818090,691818325],"class_list":{"0":"post-259183","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-uncategorized","8":"tag-artic-summer","9":"tag-climate-change","10":"tag-climate-models","11":"tag-climate-warning","12":"tag-simulations","14":"fallback-thumbnail"},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/05\/0-happy-polar-bear.jpg?fit=1237%2C774&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-15qn","jetpack-related-posts":[{"id":376738,"url":"https:\/\/climatescience.press\/?p=376738","url_meta":{"origin":259183,"position":0},"title":"Now Scientists Claim Near 20-Year Stable Arctic Sea Ice is \u201cUnsurprising\u201d and Predicted by Models","author":"uwe.roland.gross","date":"29\/04\/2025","format":false,"excerpt":"Dramatic confirmation that the sea ice in the Arctic has been stable for nearly two decades is contained in a\u00a0recently published\u00a0science paper from a team led by Dr Mark England from the University of Exeter. 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