Articles | Volume 12, issue 4
https://doi.org/10.5194/esd-12-1057-2021
https://doi.org/10.5194/esd-12-1057-2021
ESD Ideas
 | 
25 Oct 2021
ESD Ideas |  | 25 Oct 2021

ESD Ideas: A weak positive feedback between sea level and the planetary albedo

Ben Marzeion

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Latest update: 09 May 2026
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Short summary
The oceans are typically darker than land surfaces. Expanding oceans through sea-level rise may thus lead to a darker planet Earth, reflecting less sunlight. The additionally absorbed sunlight may heat planet Earth, leading to further sea-level rise. Here, we provide a rough estimate of the strength of this feedback: it turns out to be very weak, but clearly positive, thereby destabilizing the Earth system.
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