Who has the historical and climatic data of Neijiang, Sichuan?

Neijiang has a subtropical humid monsoon climate. Influenced by the basin and local natural environment, it has the characteristics of mild climate, abundant rainfall, sufficient light and heat and long frost-free period. It is warm in winter and hot in summer, with moderate rainfall. The average temperature is 15℃-28℃, the monthly average temperature is 6℃-8℃, the July average temperature is 26℃-28℃, the highest temperature is 4 1℃, the lowest temperature is -5.4℃, and the active accumulated temperature is about 598℃.

China is rich in heat resources, with an average annual total solar radiation of 89.6 kcal/cm2, annual total sunshine hours 1 100- 1300 hours and a frost-free period of 330 days. The number of frost days in the whole year is generally about 4-8 days, and the disastrous weather is mainly drought, alternating with drought and flood; Spring, summer, autumn and winter, low temperature, strong wind and heavy rain occur from time to time, and the rain is remarkable. The annual temperature is obviously dry in winter and dry in spring, while summer drought and summer drought also occur from time to time. The annual rainfall is below 1000 mm, mostly distributed in summer, accounting for about 60% of the annual rainfall. The high temperature period is basically the same as the rainy season, accounting for about 17% in spring and only 4% in winter.

Neijiang City is located in the hilly area in the middle of Sichuan Basin, surrounded by low mountains in the southeast and southwest. Hills with an altitude of 350 ~ 450 meters account for about 90%. The geological structure belongs to a part of the Neocathaysian subsidence zone, and the fold scale is small. The surface is composed of gentle purple sandstone and mudstone, which are mostly round and ridged shallow hills after long-term running water erosion and cutting. The valleys between hills are long, narrow and straight, mostly trapezoidal gentle slopes from the top of the mountain to the valley, forming a grain field with layers of steps. Mud is mainly composed of soil, coarse sand and red sand, soybean powder soil and yellow sand. These soils have good water retention and strong drought resistance, which is beneficial to crop growth.