{"id":422295,"date":"2026-01-20T17:22:46","date_gmt":"2026-01-20T16:22:46","guid":{"rendered":"https:\/\/climatescience.press\/?p=422295"},"modified":"2026-01-20T17:22:49","modified_gmt":"2026-01-20T16:22:49","slug":"new-study-brazils-relative-sea-level-was-2-meters-higher-and-ssts-3-4c-warmer-6000-years-ago","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=422295","title":{"rendered":"New Study: Brazil\u2019s Relative Sea Level Was 2+ Meters Higher and SSTs 3-4\u00b0C Warmer 6000 Years Ago"},"content":{"rendered":"\n
\"Panoramic<\/figure>\n\n\n\n

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

From No Trick Zone<\/a><\/p>\n\n\n\n

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

Across the globe, vermetid gastropods (shelled snails, or molluscs) are a \u201ccritical paleo-sea level indicator\u201d for ancient coastline reconstructions (Angulo et al., 2026<\/a><\/strong>).<\/p>\n\n\n\n

Along the Brazilian coast, vermetid shell radiocarbon ages indicate the relative sea level (RSL) was \u201cmore than 2 m above present\u201d between 6000 and 7000 years ago. (The charts shown in the study suggest RSL was 3 to 3.5 m higher than today during this period.)<\/p>\n\n\n\n

Today\u2019s latitudinal warmth threshold for living vermetid gastropod colonies along the coasts of Brazil is 22-23\u00b0S. This is over 5\u00b0 (550-600 km) north of this species\u2019 warmth threshold (28-29\u00b0S) throughout the period when there were \u201cwarmer waters during the Holocene climatic optimum.\u201d<\/p>\n\n\n\n

Since it is well established that sea surface temperatures decrease by approximately 0.5\u00b0C to 1\u00b0C for every degree of latitude moving poleward from the tropics, carbon-dated vermetid gastropod presence informs us that this region\u2019s sea surface temperatures were about 3-4\u00b0C warmer than today throughout this Early- to Mid-Holocene period.<\/p>\n\n\n\n

\"A
Image Source:\u00a0Angulo et al., 2026<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n

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

Along the Brazilian coast, vermetid shell radiocarbon ages indicate the relative sea level (RSL) was \u201cmore than 2 m above present\u201d between 6000 and 7000 years ago. (The charts shown in the study suggest RSL was 3 to 3.5 m higher than today during this period.)<\/p>\n","protected":false},"author":121246920,"featured_media":422300,"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":"Discover how ancient vermetid gastropods reveal that Brazil's sea levels were over 2 meters higher 6000 years ago. Learn more!","jetpack_seo_html_title":"Ancient Sea Levels in Brazil: Insights from Vermetid Snails","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":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":true,"token":"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.voZaXHDKzknIrdIBBzJ0QyVAmDCjYm0SbtoyJftgEnAMQ"},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[691840843,691820146,691840842,691840845,691822962,691820699,691840844],"class_list":{"0":"post-422295","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-uncategorized","8":"tag-6000-7000-years-ago","9":"tag-brazil","10":"tag-brazilian-coast","11":"tag-or-molluscs","12":"tag-relative-sea-level-rsl","13":"tag-sea-surface-temperatures","14":"tag-vermetid-gastropods-shelled-snails","16":"fallback-thumbnail"},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/01\/0AQP14F2urfYKLBtddFCIjDQEwKly-srKJan0NyJ07DqEn_Tt0jGYH7gkPbEeNbvJjvEZmayBoePaBDk4y_-Ihs3RHIjWkKrv5-R9hEvWS8IhS-5cH1XQcT2xgVkmTHzi-1.jpeg?fit=1762%2C888&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-1LRd","jetpack-related-posts":[{"id":385602,"url":"https:\/\/climatescience.press\/?p=385602","url_meta":{"origin":422295,"position":0},"title":"Mollusc Deposits Affirm Arabian Sea Levels Were 2-3 Meters Higher 7000-6000 Years Ago","author":"uwe.roland.gross","date":"28\/06\/2025","format":false,"excerpt":"Another day, another\u00a0new study\u00a0has sea levels 2.5 to 3.2 m higher than present from 7000 to 6000 years ago. 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