The southern part of the Qinghai-Tibet Plateau is at the same latitude as the Sichuan Basin, but why is the former rich in solar energy and the latter poor?

The reason of abundant solar energy in Qinghai-Tibet Plateau;

(1) The latitude is low and the solar altitude angle is large;

(2) The altitude is high, the air is thin, the atmospheric transparency is good, and the weakening effect on solar radiation is small.

The reasons for the lack of solar energy in Sichuan Basin are: due to the dual influence of southwest monsoon and southeast monsoon, and the topography of the basin, the Sichuan Basin is rainy and foggy, with a lot of clouds, and the atmosphere has a strong weakening effect on solar radiation and the solar energy is poor.

1, Lhasa, Tibet, China is 3658 meters above sea level, with a thin atmosphere, sparse air density and low water vapor content, plus a small amount of dust and clouds in the air, which makes the atmosphere very transparent;

2. Sunlight shines on the ground through the atmosphere, and the amount of absorption and scattering in the atmosphere is particularly small.

3. The annual average sunshine hours in Lhasa are as high as 3,005.3 hours, with an average daily sunshine of 8 hours 15 minutes. It is almost half that of the eastern region at the same latitude and twice that of the Sichuan Basin, so it is called "Sunlight City".