{"id":346904,"date":"2024-10-15T17:14:54","date_gmt":"2024-10-15T15:14:54","guid":{"rendered":"https:\/\/climatescience.press\/?p=346904"},"modified":"2024-10-15T17:14:56","modified_gmt":"2024-10-15T15:14:56","slug":"brown-bears-lived-in-the-73n-siberian-arctic-3500-years-agotoday-their-northern-boundary-is-65n","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=346904","title":{"rendered":"Brown Bears Lived In The 73\u00b0N Siberian Arctic 3500 Years Ago\u2026Today Their Northern Boundary Is 65\u00b0N"},"content":{"rendered":"\n
\"\"
Eterikan bear<\/figcaption><\/figure>\n\n\n\n

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

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

By\u00a0Kenneth Richard<\/a>\u00a0<\/em><\/p>\n\n\n\n

A new study<\/a> provides still more evidence the Arctic was warmer than it is today as recently as a few thousand years ago.<\/strong><\/h4>\n\n\n\n

In 2020 the well-preserved carcass of a Yakutian brown bear (Ursus arctos<\/em>) was discovered buried in permafrost on the terrain of the treeless tundra Bolshoy Lyakhovsky Island in the Arctic Ocean, 73\u00b0N.<\/p>\n\n\n\n

The Yakutian brown bear currently occupies only the forested regions of Eurasia, with a northern limit of northern Yakutia (Republic of Sakha), 65\u00b0N.<\/p>\n\n\n\n

The female bear\u2019s age has been dated to approximately 3500 years ago, during the Middle to Late Holocene. At that time the Arctic was warm enough at that latitude to support vegetation (grasses, shrubs) that only persist in the northern Yakutia region today.<\/p>\n\n\n\n

The authors suggest brown bears may have been permanent residents of the Siberian Arctic\u2019s islands from about 5000 years ago until a few thousand years ago, when, as today, the Arctic became too cold for the vegetation production requisite for their sustenance.<\/p>\n\n\n\n

\"\"
Image Source:\u00a0Cheprasov et al., 2024<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n

In the same vein, the Arctic\u2019s Wrangel Island (71\u00b0N) is home to extensive mammoth remains. Radiocarbon dating indicates the woolly mammoth continued living on this island until 3700 years ago, or until the Arctic climate became too cold to provide enough grass year-round to sustain them (Bryson et al., 2010<\/a><\/strong>, Arppe et al., 2019<\/a><\/strong>).<\/p>\n\n\n\n

A small mammoth is modeled to have conservatively required 25 kg of grass per day to survive. Mean July temperatures decreased from above 5\u00b0C during the Early Holocene to below 2.5\u00b0C \u2013 the threshold for grass production \u2013 by about 4000 years ago. Consequently, without enough year-round grass to feed on, the woolly mammoth died out (Bryson et al., 2010<\/a><\/strong>).<\/p>\n\n\n\n

\"\"
Image Source:\u00a0Bryson et al., 2010<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n

Other research (Boeskorov, 2020<\/a><\/strong>) has provided further evidence the Arctic climate was hospitable to grass-eating megafauna until as recently as a few thousand years ago.<\/p>\n\n\n\n

The remains of wild horses, musk ox, and bison have been located north of the Arctic circle in the East Siberian Sea (Arctic Ocean) dating to 5300 to 2200 calibrated years before present. The northernmost Siberian climate is far too cold to sustain these large mammals with enough food year-round today.<\/p>\n\n\n\n

\"\"
Image Source:\u00a0Boeskorov, 2020<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n

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

A new study provides still more evidence the Arctic was warmer than it is today as recently as a few thousand years ago.
\nIn 2020 the well-preserved carcass of a Yakutian brown bear (Ursus arctos) was discovered buried in permafrost on the terrain of the treeless tundra Bolshoy Lyakhovsky Island in the Arctic Ocean, 73\u00b0N.<\/p>\n","protected":false},"author":121246920,"featured_media":346911,"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":[691819172,691830943,691830945,691830944],"class_list":{"0":"post-346904","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-uncategorized","8":"tag-arctic-ocean","9":"tag-eterikan-bear","10":"tag-woolly-mammoth","11":"tag-yakutian-brown-bear-ursus-arctos","13":"fallback-thumbnail"},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/10\/00img-z3-1_01.jpg?fit=1501%2C583&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-1sfe","jetpack-related-posts":[{"id":202689,"url":"https:\/\/climatescience.press\/?p=202689","url_meta":{"origin":346904,"position":0},"title":"Grizzly spotted on Western Hudson Bay shore but there are no polar bears on land for it to mate with","author":"uwe.roland.gross","date":"06\/03\/2022","format":false,"excerpt":"On 28 May last week a big grizzly (probably a male) was\u00a0spotted on the shore\u00a0of Wapusk National Park just south of Churchill, Manitoba but unless he heads out onto the sea ice, he has no chance of finding a polar bear female to mate with. 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