{"id":378944,"date":"2025-05-20T09:39:46","date_gmt":"2025-05-20T07:39:46","guid":{"rendered":"https:\/\/climatescience.press\/?p=378944"},"modified":"2025-05-20T09:39:48","modified_gmt":"2025-05-20T07:39:48","slug":"reduced-cloud-cover-global-warming","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=378944","title":{"rendered":"Reduced Cloud Cover & Global\u00a0Warming"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n

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

From NOT A LOT OF PEOPLE KNOW THAT<\/a><\/p>\n\n\n\n

By Paul Homewood<\/p>\n\n\n\n

Climate activist and one<\/strong><\/p>\n\n\n\n

\u2013time scientist, James Hansen, has written a new paper which finds that reduced cloud cover has been largely responsible for global warming in the last 25 years:<\/strong><\/p>\n\n\n\n

\"\"
https:\/\/www.columbia.edu\/~jeh1\/mailings\/2025\/CloudFeedback.13May2025.pdf<\/a><\/figcaption><\/figure>\n\n\n\n

There is actually no great secret about any of this \u2013 it has long been known that cloud cover has decreased since at least the 1980s, mirroring the rise in sea surface temperatures.<\/p>\n\n\n\n

It is the sun which warms the oceans, not GHGs which have a negligible effect. In turn, of course, that extra heat in the oceans makes the atmosphere warmer. We see this every time there is El Nino.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
\"\"
https:\/\/www.climate4you.com\/<\/a><\/figcaption><\/figure>\n\n\n\n

It is widely accepted that we know very little about how clouds interact with the wider climate. But we do know that low level clouds tend to reduce temperatures by blocking sunlight.<\/p>\n\n\n\n

But that does not stop Hansen from claiming that the reduction in cloud cover is the result of global warming, thus creating climate feedbacks, making said warming even worse! This goes against alarmist conventions, which have usually predicted more water vapour and thus more clouds. Neither does Hansen offer a shred of evidence to back up his assertion.<\/p>\n\n\n\n

Hansen actually destroys his own credibility in his own paper, with this statement:<\/p>\n\n\n\n

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

In short, this is not an objective study which follows the evidence. Rather, it is written with the media in mind and with a preordained conclusion.<\/p>\n\n\n\n

But Hansen does accept that part of the decreased cloud cover conundrum can be explained by reduced atmospheric pollution, which has been ongoing since the Clean Air Acts of the 1950s, and most recently augmented by reduced sulphur emissions from shipping.<\/p>\n\n\n\n

As Hansen explains, aerosols act as condensation nuclei for cloud formation. Air pollution was widely blamed for global cooling in the 1970s, and we can directly observe the effects on global temperatures whenever there is a major volcano, such Pinatubo.<\/p>\n\n\n\n

Instead of obsessing about fossil fuels, maybe it\u2019s time climate scientists worked out why there is more sunlight than there was a few decades ago.<\/p>\n\n\n\n

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

There is actually no great secret about any of this \u2013 it has long been known that cloud cover has decreased since at least the 1980s, mirroring the rise in sea surface temperatures.<\/p>\n","protected":false},"author":121246920,"featured_media":378953,"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":[691835192,691818432,691821007,691818200,691818087,691821352,691820699],"class_list":{"0":"post-378944","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-uncategorized","8":"tag-clean-air-acts","9":"tag-clouds","10":"tag-dr-james-hansen","11":"tag-el-nino","12":"tag-global-warming","13":"tag-pinatubo","14":"tag-sea-surface-temperatures","16":"fallback-thumbnail"},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/05\/0Screenshot-2025-05-20-093834.png?fit=1634%2C1006&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-1AA0","jetpack-related-posts":[{"id":364009,"url":"https:\/\/climatescience.press\/?p=364009","url_meta":{"origin":378944,"position":0},"title":"Truths about Coral Bleaching: CO2 Warming vs Reduced Clouds Cover?","author":"uwe.roland.gross","date":"30\/01\/2025","format":false,"excerpt":"The coral that now form our modern reefs evolved 240 million years ago during the Age of Dinosaurs when coral formed a marvelously fluid symbiotic relationship with symbiodinium algae. The new algae symbionts absorbed CO2 and produced sugars via photosynthesis for the coral. In turn coral respiration produced CO2 that\u2026","rel":"","context":"In \"Bleaching\"","block_context":{"text":"Bleaching","link":"https:\/\/climatescience.press\/?tag=bleaching"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/01\/0Great-Barrier-Reef.jpg?fit=1200%2C800&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/01\/0Great-Barrier-Reef.jpg?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/01\/0Great-Barrier-Reef.jpg?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/01\/0Great-Barrier-Reef.jpg?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/01\/0Great-Barrier-Reef.jpg?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":332716,"url":"https:\/\/climatescience.press\/?p=332716","url_meta":{"origin":378944,"position":1},"title":"Clauser\u2019s Case: GHG Science Wrong, Clouds the Climate\u00a0Thermostat","author":"uwe.roland.gross","date":"13\/06\/2024","format":false,"excerpt":"IPCC\u2019s Green House Gas Science is Flawed and Untrustworthy. Clouds are the Thermostat for Earth\u2019s Climate, Not GHGs.","rel":"","context":"In \"Clouds\"","block_context":{"text":"Clouds","link":"https:\/\/climatescience.press\/?tag=clouds"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/06\/0-clouds-over-the-ocean-23.jpeg?fit=1200%2C801&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/06\/0-clouds-over-the-ocean-23.jpeg?fit=1200%2C801&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/06\/0-clouds-over-the-ocean-23.jpeg?fit=1200%2C801&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/06\/0-clouds-over-the-ocean-23.jpeg?fit=1200%2C801&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/06\/0-clouds-over-the-ocean-23.jpeg?fit=1200%2C801&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":286651,"url":"https:\/\/climatescience.press\/?p=286651","url_meta":{"origin":378944,"position":2},"title":"James Hansen Hots it Up Even Higher","author":"uwe.roland.gross","date":"05\/11\/2023","format":false,"excerpt":"According to a new\u00a0paper\u00a0in\u00a0Oxford Open Climate Change, the strategies humanity must pursue to reduce climate change will have to include more than reducing greenhouse gases. This new paper comes from the \u201cfather of global warming\u201d James Hansen. From Watts Up With That? New\u00a0paper from the \u201cfather of global warming\u201d argues\u2026","rel":"","context":"In \"Aerosols\"","block_context":{"text":"Aerosols","link":"https:\/\/climatescience.press\/?tag=aerosols"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/11\/OIG-2023-07-29T140658.612.jpeg?fit=1024%2C1024&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/11\/OIG-2023-07-29T140658.612.jpeg?fit=1024%2C1024&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/11\/OIG-2023-07-29T140658.612.jpeg?fit=1024%2C1024&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/11\/OIG-2023-07-29T140658.612.jpeg?fit=1024%2C1024&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":355289,"url":"https:\/\/climatescience.press\/?p=355289","url_meta":{"origin":378944,"position":3},"title":"Climate Models, Clouds, OLR, and ECS","author":"uwe.roland.gross","date":"19\/12\/2024","format":false,"excerpt":"It is now clear, at least to me, that modern climate models make many critical assumptions that are poorly supported and sometimes conflict with observations. This is an attempt to explain some of these problems and how they developed over time. It is long past time for the \u201cconsensus\u201d to\u2026","rel":"","context":"In \"carbon dioxide (CO\u2082)\"","block_context":{"text":"carbon dioxide (CO\u2082)","link":"https:\/\/climatescience.press\/?tag=carbon-dioxide-co%e2%82%82"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/12\/0scream2.jpg?fit=1000%2C558&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/12\/0scream2.jpg?fit=1000%2C558&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/12\/0scream2.jpg?fit=1000%2C558&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/12\/0scream2.jpg?fit=1000%2C558&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":353780,"url":"https:\/\/climatescience.press\/?p=353780","url_meta":{"origin":378944,"position":4},"title":"Did Fewer Clouds Contribute to This Year\u2019s Global Warming?","author":"uwe.roland.gross","date":"10\/12\/2024","format":false,"excerpt":"Some scientists are at a loss to explain the 2024 heat bump, 0.2C above what models predicted.","rel":"","context":"In \"Climate models\"","block_context":{"text":"Climate models","link":"https:\/\/climatescience.press\/?tag=climate-models"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/12\/0-Hunga-Tonga-45.webp?fit=1200%2C899&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/12\/0-Hunga-Tonga-45.webp?fit=1200%2C899&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/12\/0-Hunga-Tonga-45.webp?fit=1200%2C899&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/12\/0-Hunga-Tonga-45.webp?fit=1200%2C899&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/12\/0-Hunga-Tonga-45.webp?fit=1200%2C899&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":302880,"url":"https:\/\/climatescience.press\/?p=302880","url_meta":{"origin":378944,"position":5},"title":"How Cloud Cover and Atmospheric Density Control Global Warming","author":"uwe.roland.gross","date":"18\/02\/2024","format":false,"excerpt":"The atmosphere\u2019s density regulates the greenhouse effect. Climate scientists estimate that around 30% of the downward infrared energy from greenhouse gasses that slow the earth\u2019s surface cooling originates in just the lower 10 meters of our atmosphere, the densest layer. Over 80% of the downward infrared originates between the surface\u2026","rel":"","context":"In \"atmosphere\u2019s density\"","block_context":{"text":"atmosphere\u2019s density","link":"https:\/\/climatescience.press\/?tag=atmospheres-density"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0Atmosphere-of-Earth.jpg?fit=1200%2C675&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0Atmosphere-of-Earth.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0Atmosphere-of-Earth.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0Atmosphere-of-Earth.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0Atmosphere-of-Earth.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts\/378944","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/users\/121246920"}],"replies":[{"embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=378944"}],"version-history":[{"count":5,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts\/378944\/revisions"}],"predecessor-version":[{"id":378954,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts\/378944\/revisions\/378954"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/media\/378953"}],"wp:attachment":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=378944"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=378944"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=378944"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}