{"id":347674,"date":"2024-10-19T17:46:09","date_gmt":"2024-10-19T15:46:09","guid":{"rendered":"https:\/\/climatescience.press\/?p=347674"},"modified":"2024-10-19T17:46:12","modified_gmt":"2024-10-19T15:46:12","slug":"sea-levels-were-3-meters-higher-than-today-5000-years-ago-along-japans-coasts","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=347674","title":{"rendered":"Sea Levels Were 3 Meters Higher Than Today 5000 Years Ago Along Japan\u2019s Coasts"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n

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

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

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

Relative sea levels are lower today than at any time in the last 7000 years.<\/strong><\/h4>\n\n\n\n

According to 80-year-old aerial photograph evidence, scientists (Nakanishi et al., 2024<\/a><\/strong>) report the coastline of their studied area (Hokkaido, Japan) has \u201creceded by approximately 100 m seaward\u201d since 1944. This is a continuation of the long-term, millennial-scale decline in relative sea level.<\/p>\n\n\n\n

Accounting for crustal deformations, earthquakes, tsunamis, and vertical land movements (e.g., uplift), the authors conclude relative sea levels were \u201cat least 1 m higher than the present sea level\u201d about 2000 years ago, and a \u201cmaximum sea level of +3 m was obtained at 6-4 ka.\u201d<\/p>\n\n\n\n

So, ever since about 4000 years ago, when carbon dioxide levels were alleged to be a \u201csafe\u201d 265 ppm, relative sea levels have been falling and CO2 levels have been rising. This negatively correlated pattern has continued into the 20th and 21st centuries.<\/p>\n\n\n\n

\"\"
Image Source:\u00a0Nakanishi et al., 2024<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n

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

According to 80-year-old aerial photograph evidence, scientists (Nakanishi et al., 2024) report the coastline of their studied area (Hokkaido, Japan) has \u201creceded by approximately 100 m seaward\u201d since 1944. This is a continuation of the long-term, millennial-scale decline in relative sea level.<\/p>\n","protected":false},"author":121246920,"featured_media":347678,"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":[691827130,691831009,691818989],"class_list":{"0":"post-347674","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-uncategorized","8":"tag-carbon-dioxide-co2","9":"tag-late-holocene","10":"tag-sea-levels","12":"fallback-thumbnail"},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/10\/0-Japans-Coastline.jpeg?fit=1920%2C1200&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-1srE","jetpack-related-posts":[{"id":270899,"url":"https:\/\/climatescience.press\/?p=270899","url_meta":{"origin":347674,"position":0},"title":"Two More Studies Indicate Mid-Holocene Sea Levels Were 2-6 Meters Higher Than Present","author":"uwe.roland.gross","date":"01\/08\/2023","format":false,"excerpt":"The belief that modern sea levels are unprecedentedly high takes another hit.","rel":"","context":"In \"CO2\"","block_context":{"text":"CO2","link":"https:\/\/climatescience.press\/?tag=co2"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/08\/0p1CMu2.jpg?fit=1200%2C750&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/08\/0p1CMu2.jpg?fit=1200%2C750&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/08\/0p1CMu2.jpg?fit=1200%2C750&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/08\/0p1CMu2.jpg?fit=1200%2C750&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/08\/0p1CMu2.jpg?fit=1200%2C750&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":280433,"url":"https:\/\/climatescience.press\/?p=280433","url_meta":{"origin":347674,"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":"26\/09\/2023","format":false,"excerpt":"More evidence emerges suggesting modern relative sea level (RSL) is among the lowest in several millennia. About 7000 years ago coasts were rapidly submerged beneath the sea at rates of up to 22 meters per year.","rel":"","context":"In \"Japan\"","block_context":{"text":"Japan","link":"https:\/\/climatescience.press\/?tag=japan"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/09\/image-765.png?fit=1200%2C750&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/09\/image-765.png?fit=1200%2C750&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/09\/image-765.png?fit=1200%2C750&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/09\/image-765.png?fit=1200%2C750&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/09\/image-765.png?fit=1200%2C750&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":223696,"url":"https:\/\/climatescience.press\/?p=223696","url_meta":{"origin":347674,"position":2},"title":"New Studies Suggest Sea Levels Were 2-5 Meters Higher Than Today ~6000 Years Ago","author":"uwe.roland.gross","date":"13\/10\/2022","format":false,"excerpt":"During the much-warmer-than-today Mid-Holocene, when CO2 concentrations lingered around 265 ppm, sea levels were multiple meters higher than they are now.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2022\/10\/image-608.png?fit=802%2C1072&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2022\/10\/image-608.png?fit=802%2C1072&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2022\/10\/image-608.png?fit=802%2C1072&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2022\/10\/image-608.png?fit=802%2C1072&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":422295,"url":"https:\/\/climatescience.press\/?p=422295","url_meta":{"origin":347674,"position":3},"title":"New Study: Brazil\u2019s Relative Sea Level Was 2+ Meters Higher and SSTs 3-4\u00b0C Warmer 6000 Years Ago","author":"uwe.roland.gross","date":"20\/01\/2026","format":false,"excerpt":"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. 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