{"id":262437,"date":"2023-06-16T20:10:34","date_gmt":"2023-06-16T18:10:34","guid":{"rendered":"https:\/\/climatescience.press\/?p=262437"},"modified":"2023-06-16T20:10:37","modified_gmt":"2023-06-16T18:10:37","slug":"limate-continue-readingnew-study-shows-we-are-now-%f0%9d%91%8a%f0%9d%91%9c%f0%9d%91%9f%f0%9d%91%a0%f0%9d%91%92-at-modeling-cloud-climate-effects-than-we-were-in-1984","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=262437","title":{"rendered":"limate \u2026\u00a0Continue readingNew Study Shows We Are Now \ud835\udc4a\ud835\udc5c\ud835\udc5f\ud835\udc60\ud835\udc52 At Modeling Cloud Climate Effects Than We Were In 1984"},"content":{"rendered":"\n
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From NoTricksZone<\/a><\/p>\n\n\n\n

By\u00a0Kenneth Richard<\/a>\u00a0on\u00a0<\/em>15. June 2023<\/p>\n\n\n\n

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Scientists have determined the error in calculating effects of shortwave cloud forcing on climate spans 82-132 W\/m\u00b2 since the mid-1990s. Total clear-sky climate forcing linked to CO2 since 1750 is 1.8 W\/m\u00b2. Therefore, there is no way to accurately determine anthropogenic CO2\u2019s capacity to influence climate.<\/em><\/strong><\/p>\n\n\n\n

Even NASA<\/a><\/strong> acknowledges that for climate models to be capable of detecting an anthropogenic impact on climate \u2013 indeed, for the models to even be useful<\/em> in long-term projections \u2013 their capacity to accurately measure radiation from clouds must be improved \u201cabout a hundredfold.\u201d<\/p>\n\n\n

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Image Source:\u00a0NASA<\/p>\n\n\n\n

In a study<\/a><\/strong> published in 1984, scientists compared the total radiative surface effects of doubling CO2 from 300 to 600 ppm (\u201conly 1-2 W\/m\u00b2\u201d) to the \u201cmuch larger\u201d variability in the radiative effects of clouds in longwave (~70 to 120 W\/m\u00b2).<\/p>\n\n\n\n

At that time these scientists pointed out that the net longwave radiation from clouds varied by 2 to 74 W\/m\u00b2, -3 to 88 W\/m\u00b2, -44 to 74 W\/m\u00b2, -14 to -114 W\/m\u00b2, -62 to 68 W\/m\u00b2, and 30 to 156 W\/m\u00b2 in the tropical summer, tropical winter, mid-latitude summer, mid-latitude winter, subarctic summer, and subarctic winter, respectively.<\/p>\n\n\n\n

Interestingly, they also estimated that the errors in calculating net longwave radiation (LW\u21c5) is plausibly \u201cup to 50 W\/m\u00b2 for a particular monthly average.\u201d<\/p>\n\n\n

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Image Source:\u00a0Fung et al., 1984<\/p>\n\n\n\n