Causes of strong solar radiation in Qinghai-Tibet Plateau

The reasons for the strong solar radiation on the Qinghai-Tibet Plateau are:

1. The average elevation of the Qinghai-Tibet Plateau is more than 4,000 meters. The air is cleaner, and there is less dust, which has little effect on weakening solar radiation, and the solar radiation reaching the ground is stronger.

2. The Qinghai-Tibet Plateau has high altitude, thin air, low water vapor content and little cloud cover, which has little effect on weakening solar radiation, so the solar radiation reaching the ground is strong.

3. The latitude of Qinghai-Tibet Plateau is low, the average height of the sun is high at noon all the year round, and the solar radiation is strong.

The factors affecting solar radiation are:

1, latitude position:

At low latitudes, the height angle of the sun at noon is large, the distance of solar radiation passing through the atmosphere is short, and it is less weakened by the atmosphere, so the solar radiation reaching the ground is strong; On the contrary, it is weak. This is also one of the reasons why solar radiation decreases from low latitude to two poles.

2. Weather conditions:

On sunny days, because the clouds are few and thin, the atmosphere has a weak weakening effect on solar radiation, so the solar radiation reaching the ground is strong; In rainy weather, because the clouds are thick and rich, the atmosphere has a strong weakening effect on solar radiation, so the solar radiation reaching the ground is weak. For example, the equatorial depression in the equatorial region controls rainy weather.

The subtropical high controls the sunny weather, so the solar radiation at the equator is weaker than that in the subtropical region.

3. Altitude:

The upper air is thin, and the weakening effect of the atmosphere on solar radiation is weak, so the solar radiation reaching the ground is strong; On the contrary, it is weak. This is the main reason why the Qinghai-Tibet Plateau has become the region with the strongest solar radiation in China.

4. Sunshine length:

Long sunshine time, strong solar radiation, short sunshine time and weak solar radiation. In the summer half year, the days at high latitudes are long, which makes up for the energy lost at low solar altitude.