About 45% of the solar radiation that arrives at the top of Earth's atmosphere is absorbed by the Earth's surface.

Here's a breakdown of how the solar radiation is distributed:

* 45% absorbed by the Earth's surface: This is the energy that warms the land, water, and air directly.

* 20% absorbed by the atmosphere: Clouds and atmospheric gases like water vapor and carbon dioxide absorb some solar radiation.

* 30% reflected back to space: Clouds, the surface of the Earth, and atmospheric particles reflect a significant portion of incoming solar radiation. This is why Earth has a certain albedo (reflectivity).

It's important to note that these percentages can vary slightly depending on factors like cloud cover, latitude, and season.