Why are there so many rainy days in Guizhou Province?

Guizhou province is one of the wettest areas in China, and it is also one of the most rainy areas in China. There are more than 200 cloudy days in a year, like Zunyi in the north, with nine cloudy months in a year. In other words, on average, three out of four days are cloudy; Another example is Guiyang in central China, with an average cloudy day of 238 days per year, with cloudy days of 65,438+10 as many as 23 days in October and cloudy days of 14 days in September. The rainy days in most parts of Guizhou are more than 150 days a year, while the average rainy days in Guiyang are 188 days a year, which means that more than half of the days in a year are rainy days. There are 20 rainy days in May on average, with the least in 65438+February, but there are still as many as 13 days. 1944 65438+ It rained continuously for 28 days from1October 7th to February 3rd. Therefore, it is not an exaggeration to say that there is no sunny day in Guizhou Province.

Why are there so many rainy days in Guizhou Province? In winter, the cold air from the northern mainland has been greatly weakened after a long journey over mountains and mountains. After climbing the rugged Guizhou Plateau, the airflow moves very slowly. When it comes into contact with the warm air that originally stayed in Guizhou, it will be rainy for a long time because the two sides are evenly matched.

In spring, the warm air in the south has gradually strengthened, and the cold air in the north is not to be outdone. Cold and warm air conflict with each other, so it is sunny and rainy, and the weather is changeable.

In summer, the cold air in the north is evacuated from the north on a large scale. Warm and humid air from the Southern Ocean is active in Guizhou Plateau. The elevation of Guizhou Plateau is above 1000 meters, and the ground fluctuates, and the warm and humid airflow is disturbed by the topographic uplift, which is easy to form clouds and rain. Sometimes cold air from Sichuan meets warm and humid air from the south, which is more likely to form rainy weather or produce strong lightning and heavy rain.

In autumn, the cold air in the north begins to go south, and the warm and humid airflow cannot be retreated. Constant confrontation between cold and warm air often leads to rainy weather.

In a word, on the rugged ground of Guizhou Plateau, the air is lifted, disturbed, blocked and rubbed, and there are many opportunities for cold and warm air to contact with each other, which is the main reason for the continuous rain in Guizhou. Because of the humid climate in most parts of Guizhou, it is very suitable for the growth of trees. There are more than 2000 kinds of trees, and the famous forest products are sumac and Quercus variabilis.