{"id":445297,"date":"2026-05-19T11:27:16","date_gmt":"2026-05-19T18:27:16","guid":{"rendered":"https:\/\/climatescience.press\/?p=445297"},"modified":"2026-05-19T11:27:19","modified_gmt":"2026-05-19T18:27:19","slug":"even-the-dna-of-single-celled-plankton-can-upend-alarmist-arctic-sea-ice-melt-claims","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=445297","title":{"rendered":"Even The DNA Of Single-Celled Plankton Can Upend Alarmist Arctic Sea Ice Melt Claims"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n

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

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

New research<\/a><\/strong> utilizing the DNA of dinoflagellate (Polarella glacialis<\/em>) indicates that, 14,000 years ago, when the atmospheric CO2 concentration is thought to have been 230 ppm, the studied Arctic region (Yermak Plateau) was sea ice-free year-round.<\/p>\n\n\n\n

\u201cAround 14.0-13.9 cal kyr BP, a short-lived year-round, ice-free, open ocean occurred.\u201d<\/em><\/p>\n\n\n\n

During the Early to Middle Holocene (10,000 to 4,000 years ago), Arctic sea ice was seasonal, dominated by first-year ice that did not survive the summer melt season.<\/p>\n\n\n\n

\u201cThe Holocene Yermak Plateau is characterized by a seasonal sea ice cover, which my consist mainly of first-year sea ice \u2026 a large part of first-year ice, as opposed to seasonally drifted multi-year ice.\u201d<\/em><\/p>\n\n\n\n

Today, at 430 ppm CO2, Arctic sea ice is increasingly first-year, but a \u201cmulti-year environment\u201d persists. Multi-year sea ice has survived at least one summer melt season, and it continues to thicken over multiple years.<\/p>\n\n\n\n

The current phase is similar to the sea ice conditions that predominated ~16,000 years ago, or during the last glacial.<\/p>\n\n\n\n

\u201c\u2026a marginal sea ice cover ca. 16 cal kyr BP [characterized by] first-year sea ice in a multi-year sea ice environment, a setting not unlike today.\u201d<\/em><\/p>\n\n\n\n

If the Arctic can be sea ice-free year-round when CO2 is 230 ppm but dominated by multi-year ice when the CO2 concentration is 430 ppm, this does not support the alarmist claims that high CO2 concentrations are responsible for enhanced Arctic sea ice melt.<\/p>\n\n\n\n

\"\"
Image Source: Mayers et al., 2026<\/a><\/strong><\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

If the Arctic can be sea ice-free year-round when CO2 is 230 ppm but dominated by multi-year ice when the CO2 concentration is 430 ppm, this does not support the alarmist claims that high CO2 concentrations are responsible for enhanced Arctic sea ice melt.<\/p>\n","protected":false},"author":121246920,"featured_media":445299,"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":[691843160,691818990,691843159,691819569,691818192],"class_list":["post-445297","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-arctic-region-yermak-plateau","tag-arctic-sea-ice","tag-dinoflagellate-polarella-glacialis","tag-dna","tag-holocene","fallback-thumbnail"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/05\/0-ChatGPT-Even-The-DNA-Of-Single-Celled-Plankton-Can-Upend-Alarmist-Arctic-Sea-Ice-Melt-Claims.png?fit=1536%2C1024&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-1RQd","jetpack-related-posts":[{"id":353854,"url":"https:\/\/climatescience.press\/?p=353854","url_meta":{"origin":445297,"position":0},"title":"When Scientists, Skeptics and Eco-Loons All Agree, Except for Catastrophic Storytelling","author":"uwe.roland.gross","date":"12\/10\/2024","format":false,"excerpt":"We all agree that the wind-driven surface flow of the Atlantic Multidecadal Overturning Circulation (AMOC) brings precious warmth from the tropics towards the Arctic & enables a milder climate in Europe and North America. 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