1. Solar altitude angle or latitude: the greater the solar altitude angle, the shorter the path through the atmosphere, the smaller the weakening effect of the atmosphere on solar radiation, the stronger the solar radiation reaching the ground; the greater the solar altitude angle, the equivalent amount of the sun The smaller the area of radiation spread, the stronger the solar radiation. For example, the intensity of solar radiation at noon is stronger than that of morning and evening.
2. Altitude: The higher the altitude, the thinner the air, the smaller the weakening effect of the atmosphere on solar radiation, the stronger the solar radiation reaching the ground. For example, the Tibetan Plateau is the region with the strongest solar radiation in China.
3. Weather conditions: There are few clouds on a sunny day, the weakening effect on solar radiation is small, and the solar radiation reaching the ground is strong. For example, the cloudy and rainy weather in the Sichuan Basin, the solar radiation is weakened, and the solar radiation has become the lowest value area in my country.
4. Atmospheric transparency: high atmospheric transparency has little effect on weakening solar radiation, making solar radiation reaching the ground strong.
5. The length of daylight hours.
6. The degree of atmospheric pollution: if the pollution is heavy, it will weaken the solar radiation strongly, and will reach the ground with little solar radiation.
