{"id":417921,"date":"2025-12-20T12:06:57","date_gmt":"2025-12-20T11:06:57","guid":{"rendered":"https:\/\/climatescience.press\/?p=417921"},"modified":"2025-12-20T20:04:32","modified_gmt":"2025-12-20T19:04:32","slug":"new-study-8000-years-ago-relative-sea-level-was-30-meters-higher-than-today-across-east-antarctica","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=417921","title":{"rendered":"New Study: 8000 Years Ago, Relative Sea Level Was 30 Meters Higher Than Today Across East Antarctica"},"content":{"rendered":"\n
\"A<\/figure>\n\n\n\n

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

From NoTrickZone<\/a><\/p>\n\n\n\n

By\u00a0Kenneth Richard<\/a><\/em><\/p>\n\n\n\n

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

Today\u2019s sea levels are the lowest of the last several thousand years.<\/strong><\/h4>\n\n\n\n

Carbon dating evidence from the elevation of abandoned penguin rookeries (and other proxies) reveal relative sea level (RSL) was ~30 m higher than today across East Antarctica about 8000 years ago (Small et al., 2025<\/a><\/strong>).<\/p>\n\n\n\n

Following that high stand RSL fell rapidly at rates of 4 to 10 m per 1000 years. RSL was 24 m above present sea level (ASL) by 7200 years ago, 15 m ASL by 5700 years ago, 5 m ASL by 3200 years ago, and still 1 m ASL about 800 years ago.<\/p>\n\n\n\n

\"A
Image Source:\u00a0Small et al., 2025<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n

Another\u00a0study<\/a><\/strong>\u00a0from Antarctica\u2019s South Shetland Islands suggests RSL has plummeted by 10 meters just in the last 2000 years after a 15 m highstand 9000 years ago.<\/p>\n\n\n\n

\"Graph
Image Source:\u00a0Watcham et al., 2011<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n

There are regions in the northern hemisphere where RSL reached similarly high elevations as they did across East Antarctica. The southeast coast of Sweden, the southern Baltic Sea, records RSL 22 m higher than today from approximately 7500 to 6200 years ago (Katrantsiotis et al., 2023<\/a><\/strong>).<\/p>\n\n\n\n

\"A
Image Source:\u00a0Katrantsiotis et al., 2023<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n

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

Today\u2019s sea levels are the lowest of the last several thousand years.<\/p>\n","protected":false},"author":121246920,"featured_media":417928,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","advanced_seo_description":"Discover how sea levels were 30 meters higher in East Antarctica 8000 years ago and their rapid decline over millennia. Learn more!","jetpack_seo_html_title":"Ancient Sea Levels: 30 Meters Higher in East Antarctica","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_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":true,"token":"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.CKPCDF3tM56rf8edF5IzGK1iKNplSQkfraLRv0qMsMMMQ"},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[691840211,691824708,691836612,691840210,691820093,691840209],"class_list":["post-417921","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-above-present-sea-level-asl","tag-east-antarctica","tag-last-glacial-maximum-lgm","tag-relative-sea-level-rsl-2","tag-sea-level","tag-windmill-islands","fallback-thumbnail"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/12\/0AQOJsBXc7bHpFOr9Hg1yy_PbRz2dcAFb1Iwh3511EXVtFzpKYLZ5nKK7Phv2btY2T086NcuRq0j-iY2bkBI5liU0DdjfaCFkHEldqbl3YkLM1duwAxKdgzyO7KNlf8i1-1.jpeg?fit=1533%2C1017&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-1KIF","jetpack-related-posts":[{"id":287567,"url":"https:\/\/climatescience.press\/?p=287567","url_meta":{"origin":417921,"position":0},"title":"Melting ice, falling snow: Sea ice declines enhance snowfall over West Antarctica","author":"uwe.roland.gross","date":"11\/11\/2023","format":false,"excerpt":"By Krista Pylant,\u00a0Pennsylvania State University As the world continues to warm, Antarctica is losing ice at an increasing pace, but the loss of sea ice may lead to more snowfall over the ice sheets, partially offsetting contributions to sea level rise, according to Penn State scientists. 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