TSI

TSI, or Total Solar Irradiance, is the total amount of energy from the Sun that reaches the Earth's outer atmosphere each second. It measures the Sun's energy output at the top of the atmosphere and includes light, heat, and other radiation. TSI variations influence the Earth's climate, as increases can provide more energy to warm the planet, while decreases can contribute to cooling periods. Monitoring TSI helps scientists understand solar activity and its impact on weather, climate patterns, and long-term environmental changes.