{"id":388976,"date":"2025-07-15T18:58:59","date_gmt":"2025-07-15T16:58:59","guid":{"rendered":"https:\/\/climatescience.press\/?p=388976"},"modified":"2025-07-15T18:59:01","modified_gmt":"2025-07-15T16:59:01","slug":"new-study-africas-atlantic-coast-sea-levels-were-still-1-meter-higher-than-today-2000-years-ago","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=388976","title":{"rendered":"New Study: Africa\u2019s Atlantic Coast Sea Levels Were Still 1 Meter Higher Than Today 2000 Years Ago"},"content":{"rendered":"\n
\"\"<\/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

The narrative that says relative sea level changes are driven by variations in atmospheric CO2 concentrations has taken another hit.<\/strong><\/h4>\n\n\n\n

Before relative sea level (RSL) declined to its present position over the last millennium, Africa\u2019s Atlantic coast RSL ranged anywhere from 0.8 to 4 meters higher than today between 5000 and 1700 years ago (Vacchi et al., 2025<\/a><\/strong>).<\/p>\n\n\n\n

This Mid- to Late-Holocene RSL highstand was \u201cmainly controlled by the deglaciation history\u201d \u2212 meltwater contributions from Earth\u2019s ice sheets and glaciers. Because the climate was so much warmer than today at that time, there was significantly less water locked up on land as ice.<\/p>\n\n\n\n

The Antarctic Thermal Optimum \u201csimulated melt of the western Antarctic ice sheet until 2.0 ka BP.\u201d Consequently, sea levels were still \u2265 1 meter higher than present during the Roman Warm Period<\/p>\n\n\n\n

\u201cBetween -15\u00b0N and -0\u00b0\u2026data indicate RSL reached its maximal elevation above the present sea level in the late Holocene (~2.0 to ~1.7 ka BP).\u201d<\/em><\/p>\n\n\n\n

\"\"
Image Source: https:\/\/www.nature.com\/articles\/s41467-025-56721-0<\/a><\/figcaption><\/figure>\n\n\n\n

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

The narrative that says relative sea level changes are driven by variations in atmospheric CO2 concentrations has taken another hit.<\/p>\n","protected":false},"author":121246920,"featured_media":388980,"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":"","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_feature_clip_id":0,"_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":[691836614,691836613,691836616,691836612,691836615,691822962],"class_list":["post-388976","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-5000-and-1700-years-ago","tag-africas-atlantic-coast","tag-earths-ice-sheets-and-glaciers","tag-last-glacial-maximum-lgm","tag-mid-to-late-holocene","tag-relative-sea-level-rsl","fallback-thumbnail"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/07\/0AQP6UEBm5riKrOL5BHWaxY8MWSX94m5Hktol3UzxYjgUrY_sLQ4zxjlH4p31yPNgcsU2W9dkr2gJlaYNSVG7Zx2C3cvl5ajU5Ly_fw05UXuLfqPOY03CsI_6OorAcsM0MdCLvSk96Bt-ZvnxSOm1PndAyB9HRw-1.jpeg?fit=1280%2C1280&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-1DbO","jetpack-related-posts":[{"id":238693,"url":"https:\/\/climatescience.press\/?p=238693","url_meta":{"origin":388976,"position":0},"title":"Sea level is stable around the world","author":"uwe.roland.gross","date":"01\/09\/2023","format":false,"excerpt":"The National Oceanographic and Atmospheric Administration (NOAA) has updated its coastal sea level tide gauge data which continue to show no evidence of accelerating sea level rise.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/01\/image-375.png?fit=1200%2C800&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/01\/image-375.png?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/01\/image-375.png?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/01\/image-375.png?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/01\/image-375.png?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":280433,"url":"https:\/\/climatescience.press\/?p=280433","url_meta":{"origin":388976,"position":1},"title":"New Research: Relative Sea Level Along The Coasts Of Japan Has Fallen Nearly A Meter Since The 1800s","author":"uwe.roland.gross","date":"09\/26\/2023","format":false,"excerpt":"More evidence emerges suggesting modern relative sea level (RSL) is among the lowest in several millennia. 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