Tuesday, December 10, 2024

Abrupt global warming wiping out low level clouds, thereby heating up Earth faster via lower Albedo Effect

Utilizing satellite and reanalysis data, we identify a record-low planetary albedo as the primary factor bridging this [increased temp. explanatory] gap.  

 Yet Helge Goessling considers it unlikely that these factors alone suffice and suggests a third mechanism: global warming itself is reducing the number of low clouds. “If a large part of the decline in albedo is indeed due to feedbacks between global warming and low clouds, as some climate models indicate, we should expect rather intense warming in the future,” he stresses.

https://www.awi.de/en/about-us/service/press/single-view/sprunghafter-anstieg-der-erderwaermung-ist-massgeblich-auf-geringere-rueckstrahlkraft-des-planeten-zurueckzufuehren.html 

  “It’s conspicuous that the eastern North Atlantic, which is one of the main drivers of the latest jump in global mean temperature, was characterised by a substantial decline in low-altitude clouds not just in 2023, but also – like almost all of the Atlantic – in the past ten years.”

 With higher-level clouds, the warming effect typically predominates due to the interaction with thermal radiation, whereas with low-level clouds the cooling effect dominates due to the reflection of sunlight.

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