The Mystery of Earth's Uniform Shine Might at Last Have a Solution

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Take a look at Earth from far off in space, you'd notice it looks uniformly bright.

, which also incorporates satellite readings. They then cross referenced 50 years of data on cloud cover against storm location and intensity information.

Based on the patterns of cloud-generating cyclones and cloud-suppressing anticyclones formed by the interplay of temperature and pressure in the atmosphere, the researchers were able to show a balancing out of Earth's albedo.

The next question is how global warming might affect this balance. Based on climate models, it's likely that as the planet warms, the Northern Hemisphere will have fewer storms overall, while the Southern Hemisphere will have fewer weaker and moderate storms. However, the number of severe storms in the Southern Hemisphere is set to increase due to 'Arctic amplification'; the knock-on effects of faster warming at the North Pole. Theoretically, that should unbalance the albedo symmetry.

According to the researchers' data, the more severe weather events might not contribute to more cloud-albedo over the Southern Hemisphere as cloud levels reach saturation in strong storms. A Southern Hemisphere skewed towards stronger storms with fewer storms overall might mean a similar decline in albedo over both hemispheres, maintaining symmetry.

 

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