Which four are China and great basin?

China Four great basin refers to Tarim Basin, Junggar Basin, Qaidam Basin and Sichuan Basin.

1, Tarim basin

The largest inland basin in China lies between Tianshan and Kunlun Mountains. The widest point from north to south is 520km, and the longest point from east to west is 1400km. It covers an area of more than 400,000 square kilometers.

2. Junggar Basin

It is located between Altai Mountain and Tianshan Mountain, with the western hills of Junggar in the west and the foot of Beita Mountain in the east. It is 450 kilometers wide from north to south and 700 kilometers long from east to west, covering an area of more than 300,000 square kilometers, with desert accounting for 30%.

3. Sichuan Basin

China is a famous red bed basin with the most typical shape, the southernmost latitude and the lowest elevation in the great basin of China. Located in the east of Sichuan Province, on the upper reaches of the Yangtze River, it covers an area of more than 260,000 square kilometers, accounting for 46% of the area of Sichuan Province.

4. Qaidam Basin

As one of the three inland basins in China, it belongs to a closed giant intermountain fault basin. Located in the northwest of Qinghai Province. Surrounded by Kunlun Mountain, Qilian Mountain and Altun Mountain, it covers an area of about 250,000 square kilometers.

Extended data environment:

1. Tarim basin belongs to warm temperate climate, with annual total solar radiation of 575 ~ 627 kJ/cm2. The annual sunshine hours are about 3000 hours in the north and less than 3000 hours in the south. It's windy and dusty. The annual average temperature is 9 ~ 1 1℃, which is slightly higher in the south than in the north.

Continental nature is strengthened from west to east. It is colder in the east than in the west in winter, and the monthly average temperature is 1. Ruoqiang is 3.2℃ lower than Hotan and 2.4℃ lower than Kashgar. The average temperature in winter is below -20℃, and the freezing days are only 1 ~ 2 days. The average temperature in July is 25 ~ 27℃.

2. Zhungeer Basin has a temperate climate. The annual total solar radiation is about 565 kJ/cm2: the annual sunshine hours are about 3,000 hours in the north and 2,850 hours in the south. The average annual temperature in the north and west of the basin is 3 ~ 5℃, and in the south it is 5 ~ 7.5℃.

The eastern part of the basin is a cold wave channel, and winter is the coldest place at the same latitude in China. The average temperature of Fuyun 1 month is -28.7℃. The active accumulated temperature above 10℃ is 3 000 ~ 3 500℃ and lasts for 150 ~ 170 days. Except in Northeast China, the frost-free period is as long as 150 ~ 170 days. The daily average temperature range is 12 ~ 14℃.

3. The terrain of Sichuan Basin is blocked, and the temperature is higher than other areas in the same latitude. The average temperature in Leng Yue is 5 ~ 8℃, which is 2 ~ 4℃ higher than that in Shanghai, Wuhan in the same latitude and Guiyang in the south latitude. Extreme minimum temperature -6 ~-2℃. Frost and snow are scarce, and the frost-free period is 280 ~ 350 days throughout the year.

Summer begins at the end of May and lasts for more than 4 ~ 5 months. The temperature in the hottest month is as high as 26 ~ 29℃, the Yangtze River basin is nearly 30℃, and the extreme maximum temperature in the southeast of the basin often exceeds 40℃. Chongqing and Pengshui used to have 44℃, so Chongqing is also one of the three "stoves" in the Yangtze River Basin.

4. Qaidam basin belongs to plateau continental climate, and drought is its main feature. The annual precipitation decreases from 200mm in the southeast to 15mm in the northwest, and the annual average relative humidity is 30% ~ 40%, and the lowest can be lower than 5%.

The annual average temperature in the basin is below 5℃, and the temperature changes dramatically. The annual absolute temperature difference can reach above 60℃, the daily temperature difference is often around 30℃, and it can drop below 0℃ at night in summer. The wind is strong, and the number of gale days above magnitude 8 can reach 25 ~ 75 days, and there can even be a gale of 40 meters per second in the west, which is highly erosive.

Baidu Encyclopedia-Four great basin