Poyang Lake entered the dry season early. Why did Poyang Lake enter the dry season?
Poyang Lake is the largest freshwater lake in my country. It has now entered the dry season. According to relevant records, this is also the earliest year to enter the dry season. The reason why this situation occurs is that this year’s temperature is relatively high. Weather and other factors have some influence.
The specific location of Sun Lake is in the middle and lower reaches of the Yangtze River. It is also the first relatively large freshwater lake in our country. The lake area is about 4125 square kilometers. Because of the various factors such as sedimentation and land reclamation here, Due to various reasons, the area of Panyang Lake has shrunk, and the water flow of Panyang Lake has also begun to decrease. Over the years, the area of the lake will have recovered due to the protection of ecological policies, but there are still some other reasons that affect the area of the lake. This time Poyang Lake has entered the dry season ahead of schedule. This can be understood mainly from the climate. The water level of Panyang Lake has changed, and the size of the lake area has also changed. This is mainly due to some uncertain factors caused by the monsoon climate.
Judging from some changes during the year, the climate in most areas of the Yangtze River Basin belongs to the subtropical monsoon climate. Precipitation is very abundant in summer, which is the wind and water season, and precipitation is relatively low in winter. This This time is also called the dry season. Every summer, because the summer monsoon from the ocean brings a large amount of water vapor, there will be abundant precipitation at this time, and the water level of Panyang Lake will continue to rise, thus entering the wet season in summer.
After the rainy season, the amount of precipitation and water quality in this pot decreases, so the amount of water in the large lake will be less, and the water level will become lower. Generally, it will enter the dry season in October. This year, the lake water level will be lower in August. The water level continues to drop. According to relevant records, it can be found that the main reason is that the subtropical high pressure prevails, resulting in downdrafts and less precipitation. It feels particularly hot in this summer, and the evaporation of water vapor is relatively large and the precipitation is low. As a result, Panyang Lake enters early. The dry season.