Total Solar Irradiance

Total Solar Irradiance (TSI) is the measurement of the amount of solar energy received per unit area at the Earth’s outer atmosphere. It represents the Sun’s energy output that reaches our planet, influencing climate and weather patterns. TSI varies slightly over time due to solar activity such as sunspots and solar cycles. By studying TSI, scientists gain insight into how changes in the Sun’s energy contribute to Earth's climate changes, helping us understand natural climate variability and assess human impacts on global warming.