{"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":"","_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":[691836555,691821013,691820449,691830512,691832502],"class_list":{"0":"post-388503","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-uncategorized","8":"tag-103-pseudoproxies","9":"tag-global-temperature-data","10":"tag-hockey-stick","11":"tag-junk-science","12":"tag-michael-e-mann","14":"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":"01\/04\/2026","format":false,"excerpt":"In the annals of environmental alarmism, few figures loom larger than Paul Ehrlich and Michael Mann. Ehrlich, the Stanford biologist who died in March 2026 at age 93, authored The Population Bomb (1968), a bestseller that warned of imminent global famine, societal collapse, and resource wars driven by overpopulation. 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":300828,"url":"https:\/\/climatescience.press\/?p=300828","url_meta":{"origin":388503,"position":1},"title":"JC\u2019s expert report","author":"uwe.roland.gross","date":"09\/02\/2024","format":false,"excerpt":"The prevalent public accusation that the Hockey Stick is a \u201cfraud\u201d is largely based on image manipulation that deleted adverse data and splicing together different data sets (to \u201chide the decline\u201d) in a highly publicized version of the Hockey Stick that appeared in the IPCC TAR. Also contributing to a\u2026","rel":"","context":"In \"blogosphere\"","block_context":{"text":"blogosphere","link":"https:\/\/climatescience.press\/?tag=blogosphere"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0-Hocey-Stick.png?fit=1200%2C694&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0-Hocey-Stick.png?fit=1200%2C694&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0-Hocey-Stick.png?fit=1200%2C694&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0-Hocey-Stick.png?fit=1200%2C694&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0-Hocey-Stick.png?fit=1200%2C694&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":263562,"url":"https:\/\/climatescience.press\/?p=263562","url_meta":{"origin":388503,"position":2},"title":"Sticking It to the Mann – A Pushback on Climate “Scientist” Dr. Michael Mann","author":"uwe.roland.gross","date":"23\/06\/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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I\u2019m Not Owned!!\u201d \u2013 As He Shrinks into a Corn Cob","author":"uwe.roland.gross","date":"04\/11\/2025","format":false,"excerpt":"If you\u2019ve been following the climate circus for as long as we have here at WUWT, you know that Michael Mann \u2013 the self-proclaimed guardian of the infamous \u201chockey stick\u201d graph \u2013 has been skating on thin ice for years. 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