Humanity has fundamentally changed the Earth's surface albedo. By replacing grasslands and forests with dark asphalt roads and tar-paper roofs, we have created . Cities become significantly hotter than surrounding rural areas because they absorb and trap solar energy rather than reflecting it.
: A perfect mirror or surface that reflects all radiation (e.g., fresh snow at ~0.9). Albedo
Derived from the Latin word for "whiteness," albedo is a dimensionless, scientific measure of the reflectivity of a surface. It quantifies the fraction of solar radiation (sunlight) that a surface reflects back into space. Officially expressed as a value between 0 and 1, an albedo of 0 means a surface is a perfect black body, absorbing 100% of incoming light, while an albedo of 1 means it is a perfect mirror, reflecting 100%. : A perfect mirror or surface that reflects all radiation (e
has one of the highest albedos in the solar system (~0.99), because its surface is constantly sprayed with fresh, pristine ice crystals from cryovolcanoes. Officially expressed as a value between 0 and
: A perfect reflector that bounces back all radiation.