How much solar energy is received by earth's atmosphere per second per square meter?

Earth's atmosphere receives approximately 1,366 watts of solar energy per second per square meter at the top of the atmosphere, a value known as the solar constant. However, due to the scattering, absorption, and reflection by the atmosphere, the amount of solar energy that reaches the Earth's surface is about 1,000 watts per square meter on a clear day. This energy is crucial for driving weather, climate, and photosynthesis.