Why are clear night are colder than cloudy nights
Answers
This is true even during complete overcast conditions because the clouds are generally colder than the air at the ground. Thus clouds in effect reduce the radiation imbalance between the upward flux from the ground and downward flux from the atmosphere, relative to that on clear nights.
Thermal conduction is the transfer of internal energy by microscopic diffusion and collisions of particles or quasi-particles within a body.
Conduction can only take place within an object or material, or between two objects that are in contact with each other.
In conduction, the heat flow is within and through the body itself. In contrast, in heat transfer by thermal radiation, the transfer is often between bodies, which may be separated spatially.
Clouds act like blankets which prevent heat energy stored in the air and soil from leaving the Earth in the form of infrared radiation.
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