{"id":255171,"date":"2023-04-28T21:34:47","date_gmt":"2023-04-28T19:34:47","guid":{"rendered":"https:\/\/climatescience.press\/?p=255171"},"modified":"2023-04-28T21:34:51","modified_gmt":"2023-04-28T19:34:51","slug":"study-northern-greenland-was-ice-free-forested-125k-years-ago-adding-3-meters-to-sea-levels","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=255171","title":{"rendered":"Study: Northern Greenland Was Ice Free, Forested ~125k Years Ago, Adding 3 Meters To Sea Levels"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n

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

Fro NoTricksZone<\/a><\/p>\n\n\n\n

By\u00a0Kenneth Richard<\/a>\u00a0on\u00a0<\/em>27. April 2023<\/p>\n\n\n\n

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

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

During the last interglacial (LIG) 127 to 119k years ago, when CO2 levels were said to be only 275 ppm, Greenland\u2019s Camp Century surface was ice free, vegetated. Today this same site is buried under a 1.4 kilometers-high ice sheet.<\/strong><\/h4>\n\n\n\n

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

The Arctic was sea ice free during the LIG (Diamond et al., 2021<\/a><\/strong>).<\/p>\n\n\n

\n
\"\"\/<\/figure>\n<\/div>\n\n\n
Image Source:\u00a0Diamond et al., 2021<\/a><\/strong><\/h6>\n\n\n\n

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

Forests extended to the coasts of the Arctic Ocean during the last interglacial (Sommers et al., 2022<\/a><\/strong>). The wasting of the Greenland ice sheet during the LIG translated into 3 meters of sea level equivalent (SLE) from Greenland alone.<\/p>\n\n\n\n

As mentioned, Greenland locations that are today covered in 1,400 meters of ice (Christ et al., 2021<\/a><\/strong>) were ice-free and covered with vegetation during the LIG (Sommers et al., 2022<\/a><\/strong>).<\/p>\n\n\n

\n
\"\"\/<\/figure>\n<\/div>\n\n\n
Image Source:\u00a0Sommers et al., 2022<\/a><\/strong><\/h6>\n\n\n\n

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

The Earth\u2019s melted glaciers and Antarctic ice sheet added another 3-6 m of water to the ocean basins, resulting in global sea levels 6-9 meters higher than today during the LIG (Clark et al., 2020<\/a><\/strong>).<\/p>\n\n\n

\n
\"\"\/<\/figure>\n<\/div>\n\n\n
Image Source:\u00a0Clark et al., 2020<\/a><\/strong><\/h6>\n\n\n\n

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

For some reason it is assumed by mainstream scientists that CO2 has been driving changes to the Greenland ice sheet in recent decades even though measurements indicate the CO2 greenhouse effect (GHE) impact is close to 0 W\/m\u00b2 over Greenland.<\/p>\n\n\n\n

The CO2 GHE is said to be as \u201ccomparatively weak\u201d for Greenland as it is for Antarctica (-2.9 W\/m\u00b2 to +1 W\/m\u00b2), a location where increasing CO2 leads to surface cooling, not warming (Schmithusen et al., 2015<\/a><\/strong>).<\/p>\n\n\n

\n
\"\"\/<\/figure>\n<\/div>\n\n\n
Image Source:\u00a0Schmithusen et al., 2015<\/a><\/strong><\/h6>\n\n\n\n

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

In other words, there is no past or present evidence to suggest the Greenland ice sheet is climatically responding to changes in atmospheric CO2 concentrations.<\/p>\n\n\n\n

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

<\/p>\n","protected":false},"excerpt":{"rendered":"

For some reason it is assumed by mainstream scientists that CO2 has been driving changes to the Greenland ice sheet in recent decades even though measurements indicate the CO2 greenhouse effect (GHE) impact is close to 0 W\/m\u00b2 over Greenland.<\/p>\n","protected":false},"author":121246920,"featured_media":255174,"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":[691819172,691818076,691818252,691819171],"class_list":{"0":"post-255171","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-uncategorized","8":"tag-arctic-ocean","9":"tag-co2","10":"tag-greenland","11":"tag-ice-free","13":"fallback-thumbnail"},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/04\/0North-01-A-passenger-boat-near-Ilulissat-and-the-ice-fjord-in-Greenland.jpg?fit=2400%2C1600&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-14nF","jetpack-related-posts":[{"id":360304,"url":"https:\/\/climatescience.press\/?p=360304","url_meta":{"origin":255171,"position":0},"title":"Central Greenland Was Recently Ice-Free and Covered with Plants When CO2 Was Under 300 ppm","author":"uwe.roland.gross","date":"03\/01\/2025","format":false,"excerpt":"Scientists have known since the GISP2 borehole was drilled in 1993 that Central Greenland deglaciated at least once in the late Pleistocene (Bierman et al., 2024). Indeed, the Summit of the modern Greenland ice sheet was actually ice-free at some point between 250,000 and 1.1 million years ago \u2013 which\u2026","rel":"","context":"In \"carbon dioxide (CO\u2082)\"","block_context":{"text":"carbon dioxide (CO\u2082)","link":"https:\/\/climatescience.press\/?tag=carbon-dioxide-co%e2%82%82"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/01\/0DSC06126.jpg?fit=1200%2C800&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/01\/0DSC06126.jpg?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/01\/0DSC06126.jpg?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/01\/0DSC06126.jpg?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/01\/0DSC06126.jpg?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":360658,"url":"https:\/\/climatescience.press\/?p=360658","url_meta":{"origin":255171,"position":1},"title":"Scientists: Greenland July 14\u00b0C Warmer With 35% Less CO2 250,000 Years Ago!","author":"uwe.roland.gross","date":"06\/01\/2025","format":false,"excerpt":"A new study by Bierman et al titled:\u00a0Plant, insect, and fungi fossils under the center of Greenland\u2019s ice sheet are evidence of ice-free times, shows that \u201cin the middle of Greenland, where a three-kilometer-thick ice sheet now sits, plants and insects once flourished and at CO2 levels well below today\u2019s\u2026","rel":"","context":"In \"carbon dioxide (CO\u2082)\"","block_context":{"text":"carbon dioxide (CO\u2082)","link":"https:\/\/climatescience.press\/?tag=carbon-dioxide-co%e2%82%82"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/01\/0Seljalandsfoss-summer.webp?fit=1200%2C583&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/01\/0Seljalandsfoss-summer.webp?fit=1200%2C583&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/01\/0Seljalandsfoss-summer.webp?fit=1200%2C583&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/01\/0Seljalandsfoss-summer.webp?fit=1200%2C583&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/01\/0Seljalandsfoss-summer.webp?fit=1200%2C583&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":192102,"url":"https:\/\/climatescience.press\/?p=192102","url_meta":{"origin":255171,"position":2},"title":"New Analysis of Greenland\u2019s GISP2 Temperatures Expose Selection Bias in Paleo Reconstructions","author":"uwe.roland.gross","date":"17\/03\/2022","format":false,"excerpt":"Scientists admit that 3 different Greenland Summit (GISP2) temperature reconstruction \u201cstrategies\u201d produce 3 different paleoclimate temperature results. The reconstructions chosen as the most \u201crobust\u201d are therefore the ones that align best with the authors\u2019 presuppositions. In a new study published in\u00a0Quaternary Science Reviews\u00a0scientists (D\u00f6ring and Luenberger, 2022) report they reject\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2022\/03\/00Holocene-Cooling-SW-Greenland-6-8C-warmer-10-5-ka-Allan-2021.jpg?fit=1200%2C640&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2022\/03\/00Holocene-Cooling-SW-Greenland-6-8C-warmer-10-5-ka-Allan-2021.jpg?fit=1200%2C640&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2022\/03\/00Holocene-Cooling-SW-Greenland-6-8C-warmer-10-5-ka-Allan-2021.jpg?fit=1200%2C640&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2022\/03\/00Holocene-Cooling-SW-Greenland-6-8C-warmer-10-5-ka-Allan-2021.jpg?fit=1200%2C640&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2022\/03\/00Holocene-Cooling-SW-Greenland-6-8C-warmer-10-5-ka-Allan-2021.jpg?fit=1200%2C640&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":334141,"url":"https:\/\/climatescience.press\/?p=334141","url_meta":{"origin":255171,"position":3},"title":"Reminder: Historical Natural Warming Rates Dwarf Modern Climate Change","author":"uwe.roland.gross","date":"22\/06\/2024","format":false,"excerpt":"Greenland has not warmed (net) in the last 90 years.","rel":"","context":"In \"Climate change\"","block_context":{"text":"Climate change","link":"https:\/\/climatescience.press\/?tag=climate-change"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/06\/0-Greenland-44.jpeg?fit=1200%2C750&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/06\/0-Greenland-44.jpeg?fit=1200%2C750&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/06\/0-Greenland-44.jpeg?fit=1200%2C750&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/06\/0-Greenland-44.jpeg?fit=1200%2C750&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/06\/0-Greenland-44.jpeg?fit=1200%2C750&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":339085,"url":"https:\/\/climatescience.press\/?p=339085","url_meta":{"origin":255171,"position":4},"title":"Lost for 30 years in a freezer: The whole of Greenland melted away when CO2 was perfect \u2014 consensus broken","author":"uwe.roland.gross","date":"09\/08\/2024","format":false,"excerpt":"The Experts thought Greenland\u2019s ice has been there for the whole Pleistoscene era, or the last 2.6 million years. It was just another useless consensus, stultifying science \u2014 feeding the myth that the climate was perfect until Big Coal screwed it up.","rel":"","context":"In \"Climate models\"","block_context":{"text":"Climate models","link":"https:\/\/climatescience.press\/?tag=climate-models"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/08\/0211295_web.jpg?fit=1200%2C900&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/08\/0211295_web.jpg?fit=1200%2C900&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/08\/0211295_web.jpg?fit=1200%2C900&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/08\/0211295_web.jpg?fit=1200%2C900&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/08\/0211295_web.jpg?fit=1200%2C900&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":345601,"url":"https:\/\/climatescience.press\/?p=345601","url_meta":{"origin":255171,"position":5},"title":"\u00a0Not About CO2\u2026Greenland Still Much Colder Today Than Much Of The Past 10,000 Years","author":"uwe.roland.gross","date":"06\/10\/2024","format":false,"excerpt":"Norwegian climate blog site\u00a0avdekt.no here reports\u00a0how the GISP2 ice core data from Greenland shows the current temperature is well below the Holocene average.\u00a0","rel":"","context":"In \"GISP2 ice core data\"","block_context":{"text":"GISP2 ice core data","link":"https:\/\/climatescience.press\/?tag=gisp2-ice-core-data"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/10\/0Screenshot-2024-10-06-103524.png?fit=1200%2C618&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/10\/0Screenshot-2024-10-06-103524.png?fit=1200%2C618&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/10\/0Screenshot-2024-10-06-103524.png?fit=1200%2C618&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/10\/0Screenshot-2024-10-06-103524.png?fit=1200%2C618&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/10\/0Screenshot-2024-10-06-103524.png?fit=1200%2C618&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts\/255171","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/users\/121246920"}],"replies":[{"embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=255171"}],"version-history":[{"count":5,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts\/255171\/revisions"}],"predecessor-version":[{"id":255178,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts\/255171\/revisions\/255178"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/media\/255174"}],"wp:attachment":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=255171"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=255171"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=255171"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}