{"id":329433,"date":"2024-05-18T13:22:44","date_gmt":"2024-05-18T11:22:44","guid":{"rendered":"https:\/\/climatescience.press\/?p=329433"},"modified":"2024-05-18T13:22:46","modified_gmt":"2024-05-18T11:22:46","slug":"new-study-finds-an-extremely-low-co2-climate-sensitivity-for-the-arctic-and-antarctic","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=329433","title":{"rendered":"New Study Finds An Extremely Low CO2 Climate Sensitivity For The Arctic And Antarctic"},"content":{"rendered":"\n
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From NoTricksZone<\/a><\/p>\n\n\n\n

By\u00a0Kenneth Richard<\/a><\/em><\/p>\n\n\n\n

The phenomenon of increasing the concentration of greenhouse gases (water vapor, carbon dioxide, methane) is assumed to lead to sharply rising temperatures in polar regions, or \u201cpolar amplification.\u201d As it turns out, it doesn\u2019t.<\/strong><\/p>\n\n\n\n

Per a new radiative forcing model (Notholt et al., 2024<\/a><\/strong>), increasing CO2 from pre-industrial to present levels (278 to 400 ppm) results in a slight cooling effect for all of Antarctica (-0.01\u00b0C), reinforcing the \u201cnegative greenhouse effect\u201d conclusion of previous studies.<\/p>\n\n\n\n

The increased CO2 concentration does result in a warming for the Arctic in their model, but only 0.42\u00b0C for the 122 ppm increase. This implies CO2 cannot be responsible for the bulk of modern Arctic warming.<\/p>\n\n\n\n

It was also determined that for Antarctica, \u201cdoubling CH4 leads to a cooling of almost the whole troposphere.\u201d<\/p>\n\n\n\n

The negative greenhouse effect of water vapor \u2013 Earth\u2019s main greenhouse gas \u2013 dominates over CO2 with regard to climate impacts in polar regions.<\/p>\n\n\n\n

The authors suggest their results provide an explanation for the \u201clack of warming seen in Antarctica throughout the last decades.\u201d<\/p>\n\n\n\n

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Image Source:\u00a0Notholt et al., 2024<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n
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