Climatic conditions in Anyue County, Sichuan Province

Anyue County belongs to subtropical humid monsoon climate, with four distinct seasons, warm winter and early spring, and the same season of rain and heat. The rainfall is abundant, but it is unevenly distributed in time and space. It has the characteristics of dry winter, spring drought, summer drought and autumn rain, abundant sunshine, long frost-free period and low wind speed. Annual average temperature 18 and 5 degrees Celsius, annual average sunshine hours 1 192 and 7 hours. The average annual rainfall is 924 and 9 mm, and the average annual rainfall days are 147 and 7 days. Rainfall is concentrated from May to September, with the most in July.

Climate, a natural science term, refers to the multi-year average state of the atmosphere in a region. The main climatic factors include light, temperature and precipitation, of which precipitation is an important factor. The climate types in China are: tropical monsoon climate, subtropical monsoon climate and temperate monsoon climate? Temperate continental climate, alpine plateau climate.

Climate is a long-term average state of atmospheric physical characteristics, which is different from weather and has certain stability. According to the World Meteorological Organization (WMO), a standard climate calculation time is 30 years. Climate is measured by the characteristics of cold, warm, dry and wet, and is usually characterized by the average value and deviation value of a certain period.

Climate refers to the multi-year average state of the atmosphere in a region. The main climatic factors include light, temperature, precipitation and wind, among which precipitation is an important factor. Generally speaking, areas with annual precipitation above 800 mm are rainy areas; Areas with annual precipitation of 400-800 mm are less rainy areas; The areas with annual precipitation of 200 to 400 mm are semi-arid areas; The area with annual precipitation below 200mm is an arid area.

The distribution characteristics of precipitation in an area can be divided into two parts: regional distribution and seasonal distribution. China is located in the east of Asia-Europe continent and the west coast of the Pacific Ocean, with great differences in thermal properties between land and sea, forming the most typical monsoon climate in the world. The precipitation in China is mainly brought by the southeast monsoon in summer.

The southeast monsoon brings the water vapor from the Pacific Ocean to China, and the southeast coastal areas of China will be the first to get the water vapor brought by the southeast monsoon, forming rich precipitation and becoming the region with the richest annual precipitation in China.