What are the climatic characteristics of Chengdu?

Chengdu has a subtropical monsoon climate, characterized by early spring, hot summer, cool autumn and warm winter. The monthly average temperature of 65438+ 10 is 6.2℃, the lowest temperature is-1.5℃, the July average temperature is 25.8℃, and the highest temperature is 36. 1. The annual precipitation is about1500mm.

It is best to visit Chengdu in spring and autumn, for example, to visit other scenic spots in Sichuan from Chengdu, which varies from place to place. It is suitable to visit Jiuzhaigou from late spring to autumn, and the best time is from September to 65438+ 10. The average temperature in summer is 19 ~ 22℃, and the weather in autumn is refreshing and pleasant. The temperature is mostly 7~ 18℃, but the temperature difference between day and night is large, so winter clothes such as sweaters should be worn. The vertical temperature difference in Emei scenic spot is large.

There is not much difference between low mountains and plains. The temperature in Zhongshan area is 4~5℃ lower than that in the mountains, so tourists need to prepare enough clothes. The mountain area is about 10℃ lower than the mountain, but the tour organizers on the mountain have cotton-padded clothes; The best season to visit Siguniang Mountain in Ganzi area is May, 12, 1 and February. It rains a lot in June ~ 10 It's cold at night, so wear a thin sweater.

Geology of Chengdu.

Chengdu has a long geological history and well exposed strata. The terrain of the whole city is obviously different, with high in the northwest and low in the southeast. The western part belongs to the marginal area of Sichuan basin, mainly in deep mountains and hills, with an altitude of1000-3000m. The highest point is Shuanghe Township, Dayi County, with an altitude of 5353 meters and a relative height of about 1000 meters.

The eastern part belongs to the basin-bottom plain of Sichuan Basin, which is the heart of Chengdu Plain. It is mainly composed of Quaternary impact plain, platform and some low hills. The soil layer is deep and fertile, with a long history of development, high reclamation index and flat terrain. The altitude is generally about 500 meters, and the lowest point is Yuntai Township, Jintang County, with an altitude of only 387 meters. The height difference between east and west of Chengdu is 4966 meters.

Because of the obvious difference in surface elevation, the spatial distribution of climate factors such as water and heat is directly different. Not only is the temperature, water temperature and ground temperature in the western mountainous area far lower than that in the eastern plain, but there is also a vertical climate zone with obvious temperature difference between the upper and lower mountainous areas, so the biological resources in Chengdu are various, complete in categories and relatively concentrated in distribution.