the cooling of the earth’s surface and adjacent air, primarily at night, caused by a loss of heat due to surface emission of infrared radiation.
The cooling of the Earth’s surface and the air near the surface, occurring chiefly at night. It is caused by the emission of infrared radiation from the Earth’s surface and from the tops of clouds and the atmosphere. Because infrared radiation is absorbed by water vapor, cloudless nights usually allow for greater radiational cooling than overcast nights. Radiational cooling occurs in all regions of the Earth and is important in maintaining the Earth’s energy balance.
noun, Physics. 1. . noun 1. a region in the magnetosphere of a planet in which charged particles are trapped by the planet’s magnetic field, an example being the earth’s Van Allen belts noun a region around a planet where charged particles accumulate due to the planet’s magnetic field Usage Note astronomy
- Radiation biology
radiation biology n. The study of the biological effects of ionizing radiation on living systems.
- Radiation damage
The damage caused by the removal of atoms from a solid material when elementary particles, such as those associated with cosmic rays or radioactivity, collide with it. Note: Radiation damage is an important consideration in the design of nuclear reactors, where radiation levels are high. Note: Radiation damage is one of the devastating effects of […]
- Radiation dermatitis
radiation dermatitis n. See radiodermatitis.