{"id":388503,"date":"2025-07-12T20:21:42","date_gmt":"2025-07-12T18:21:42","guid":{"rendered":"https:\/\/climatescience.press\/?p=388503"},"modified":"2025-07-12T20:21:43","modified_gmt":"2025-07-12T18:21:43","slug":"manns-hockey-stick-still-crap-after-all-these-years","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=388503","title":{"rendered":"Mann\u2019s Hockey Stick \u2013 Still Crap After All these Years"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n

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

From Watts Up With That?<\/a><\/p>\n\n\n\n

By Anthony Watts<\/a><\/p>\n\n\n\n

From the\u00a0\u201canybody can make a hockey stick out of random numbers department\u201d<\/em>\u00a0and Twitter comes this interesting exercise. Steve McIntyre and Ross McKittrick demonstrated this two decades ago. Of course, Mann still insists he\u2019s right, mainly because his super-sized ego won\u2019t allow him to admit his errors.<\/p>\n\n\n\n

@andy on X writes:<\/a>

Did my own try on the Mann\/Marcott\/PAGES2K proxy screening<\/strong> routine and created an ensemble of 103 pseudoproxies consisting of random numbers between -2 and +2 for the time 0-2025 AD. To find the \u201ctemperature sensitive\u201d proxies (as prescribed for this process) I tested correlation of the random proxies with the NOAA global temperature data set 1850-2025. The chart below shows what I received as average after discarding the negatively and non-correlating proxies. I created global warming from a bunch of meaningless casino numbers, pure noise.<\/p>\n\n\n

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

The average of the whole ensemble of pseudoproxies shows no real trend, of course.<\/p>\n\n\n

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

Simply flipping (changing the sign) of the pseudoproxies that have the worst correlation has a similar effect (chart below). That is also allowed in their view, since correlation is correlation and can be used, be it negative or positive.<\/p>\n\n\n

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

Steve McIntyre weighs in:<\/p>\n\n\n

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

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

From the\u00a0\u201canybody can make a hockey stick out of random numbers department\u201d\u00a0and Twitter comes this interesting exercise. Steve McIntyre and Ross McKittrick demonstrated this two decades ago. Of course, Mann still insists he\u2019s right, mainly because his super-sized ego won\u2019t allow him to admit his errors.<\/p>\n","protected":false},"author":121246920,"featured_media":255670,"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":[691836555,691821013,691820449,691830512,691832502],"class_list":["post-388503","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-103-pseudoproxies","tag-global-temperature-data","tag-hockey-stick","tag-junk-science","tag-michael-e-mann","fallback-thumbnail"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/05\/00-michael-mann-%C2%B4s-bogus-hockey-stick.jpeg?fit=1080%2C720&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-1D4b","jetpack-related-posts":[{"id":436298,"url":"https:\/\/climatescience.press\/?p=436298","url_meta":{"origin":388503,"position":0},"title":"Paul Ehrlich and Michael Mann \u2013 Both Used the Media to Hide Their Misanthropy","author":"uwe.roland.gross","date":"04\/01\/2026","format":false,"excerpt":"In the annals of environmental alarmism, few figures loom larger than Paul Ehrlich and Michael Mann. 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Mann,\u2026","rel":"","context":"In \"catastrophic predictions\"","block_context":{"text":"catastrophic predictions","link":"https:\/\/climatescience.press\/?tag=catastrophic-predictions"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/04\/0-Paul-Ehrlich-and-Michael-Mann.jpg?fit=1200%2C600&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/04\/0-Paul-Ehrlich-and-Michael-Mann.jpg?fit=1200%2C600&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/04\/0-Paul-Ehrlich-and-Michael-Mann.jpg?fit=1200%2C600&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/04\/0-Paul-Ehrlich-and-Michael-Mann.jpg?fit=1200%2C600&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/04\/0-Paul-Ehrlich-and-Michael-Mann.jpg?fit=1200%2C600&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":263562,"url":"https:\/\/climatescience.press\/?p=263562","url_meta":{"origin":388503,"position":1},"title":"Sticking It to the Mann – A Pushback on Climate “Scientist” Dr. Michael Mann","author":"uwe.roland.gross","date":"06\/23\/2023","format":false,"excerpt":"Recently, hockey stick creator Dr. Michael Mann went on CBC to try linking wildfires and climate change, and the result was laughable. 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