{"id":357893,"date":"2024-12-22T12:45:03","date_gmt":"2024-12-22T11:45:03","guid":{"rendered":"https:\/\/climatescience.press\/?p=357893"},"modified":"2024-12-22T12:55:17","modified_gmt":"2024-12-22T11:55:17","slug":"2024-natural-climate-factors-snow","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=357893","title":{"rendered":"2024 Natural Climate Factors:\u00a0Snow"},"content":{"rendered":"\n
\"\"
wallup.net<\/figcaption><\/figure>\n\n\n\n

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

From Science Matters<\/a><\/p>\n\n\n\n

By\u00a0Ron Clutz<\/a><\/p>\n\n\n

\n
\"\"<\/a><\/figure>\n<\/div>\n\n\n

Previously I posted an explanation by Dr. Judah Cohen regarding a correlation between autumn Siberian snow cover and the following winter conditions, not only in the Arctic but extending across the Northern Hemisphere. More recently, in looking into Climate Model Upgraded: INMCM5<\/a>, I noticed some of the scientists were also involved in confirming the importance of snow cover for climate forecasting. Since the poles function as the primary vents for global cooling, what happens in the Arctic in no way stays in the Arctic. This post explores data suggesting changes in snow cover drive some climate changes.<\/p>\n\n\n\n

The Snow Cover Climate Factor<\/strong><\/p>\n\n\n\n

The diagram represents how Dr. Judah Cohen pictures the Northern Hemisphere wintertime climate system.  He leads research regarding Arctic and NH weather patterns for AER.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Dr. Cohen explains the mechanism in this diagram.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Conceptual model for how fall snow cover modifies winter circulation in both the stratosphere and the troposphere\u2013The case for low snow cover on left, the case for extensive snow cover on right.<\/p>\n\n\n\n

1. Snow cover increases rapidly in the fall across Siberia, when snow cover is above normal diabatic cooling helps to;
2. Strengthen the Siberian high and leads to below normal temperatures.
3. Snow forced diabatic cooling in proximity to high topography of Asia increases upward flux of energy in the troposphere, which is absorbed in the stratosphere.
4. Strong convergence of WAF (Wave Activity Flux) indicates higher geopotential heights.
5. A weakened polar vortex and warmer down from the stratosphere into the troposphere all the way to the surface.
6. Dynamic pathway culminates with strong negative phase of the Arctic Oscillation at the surface.<\/p>\n\n\n\n

From Eurasian Snow Cover Variability and Links with Stratosphere-Troposphere<\/a>
Coupling and Their Potential Use in Seasonal to Decadal Climate Predictions by Judah Cohen.<\/p>\n\n\n\n

Observations of the Snow Climate Factor<\/strong><\/p>\n\n\n\n

The animation at the top shows from remote sensing that Eurasian snow cover fluctuates significantly from year to year, taking the end of October as a key indicator.<\/p>\n\n\n\n

For more than five decades the IMS snow cover images have been digitized to produce a numerical database for NH snow cover, including area extents for Eurasia. The NOAA climate data record of Northern Hemisphere snow cover extent, Version 1, is archived and distributed by NCDC\u2019s satellite Climate Data Record Program. The CDR is forward processed operationally every month, along with figures and tables made available at Rutgers University Global Snow Lab<\/a>.<\/p>\n\n\n\n

This first graph shows the snow extents of interest in Dr. Cohen\u2019s paradigm. The Autumn snow area in Siberia is represented by the annual Eurasian averages of the months of October and November (ON). The following NH Winter is shown as the average snow area for December, January and February (DJF). Thus, the year designates the December of that year plus the first two months of the next year.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Notes: NH snow cover minimum was 1981, trending upward since.\u00a0 Siberian autumn snow cover was lowest in 1989, increasing since then.\u00a0 Autumn Eurasian snow cover is about 1\/3 of Winter NH snow area. Note also that fluctuations are sizable and correlated.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

The second graph presents annual anomalies for the two series, each calculated as the deviation from the mean of its entire time series. Strikingly, the Eurasian Autumn flux is on the same scale as total NH flux, and closely aligned. While NH snow cover declined a few years prior to 2016, Eurasian snow has trended upward afterward.\u00a0 If Dr. Cohen is correct, NH snowfall will follow. The linear trend is slightly positive, suggesting that fears of children never seeing snowfall have been exaggerated. The Eurasian trend line (not shown) is almost the same.<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

Illustration by Eleanor Lutz shows Earth\u2019s seasonal climate changes. If played in full screen, the four corners present views from top, bottom and sides. It is a visual representation of scientific datasets measuring ice and snow extents.<\/p>\n\n\n

\n
\"\"\/<\/figure>\n<\/div>\n\n\n

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

Previously I posted an explanation by Dr. Judah Cohen regarding a correlation between autumn Siberian snow cover and the following winter conditions, not only in the Arctic but extending across the Northern Hemisphere. <\/p>\n","protected":false},"author":121246920,"featured_media":357904,"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":[691818605,691832222,691819191,691832224,691832223],"class_list":{"0":"post-357893","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-uncategorized","8":"tag-arctic","9":"tag-climate-model-upgraded-inmcm5","10":"tag-snow","11":"tag-waf-wave-activity-flux","12":"tag-winter-circulation","14":"fallback-thumbnail"},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/12\/01342255-hd-snow-wallpaper-2560x1600-ipad-retina.jpg?fit=2560%2C1600&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-1v6t","jetpack-related-posts":[{"id":230374,"url":"https:\/\/climatescience.press\/?p=230374","url_meta":{"origin":357893,"position":0},"title":"Climate Alarmist Physics","author":"uwe.roland.gross","date":"21\/11\/2022","format":false,"excerpt":"Increased snow cover means the area covered with snow is extending further south. 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Don\u2019t forget folks, the science is settled.","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\/0Screenshot-2023-01-26-123357.png?fit=911%2C620&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/01\/0Screenshot-2023-01-26-123357.png?fit=911%2C620&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/01\/0Screenshot-2023-01-26-123357.png?fit=911%2C620&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/01\/0Screenshot-2023-01-26-123357.png?fit=911%2C620&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":420204,"url":"https:\/\/climatescience.press\/?p=420204","url_meta":{"origin":357893,"position":2},"title":"Europe\u2019s No Snow Global Warming Winter Just got Buried Under White Climate Change","author":"uwe.roland.gross","date":"06\/01\/2026","format":false,"excerpt":"Europe experienced a relatively mild and low-snow start to the 2025\/2026 winter, with media reports in late December 2025 highlighting bare ski slopes in the Alps and concerns over climate change impacts on snowfall. 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