What are the climatic factors?

Climate elements, also known as climate statistics, are the results of years of observation and recording of various meteorological elements in different ways.

The main climatic factors include temperature, precipitation and light. They are the basic data for analyzing and describing climate characteristics and their changing laws. The commonly used climatic factors include average value, total amount, frequency, extreme value, variability, the number of days of various weather phenomena and their first and last days, and the duration of some meteorological factors.

Climate statistics usually need long-term observation records to make the statistical results more stable, generally taking records for more than 30 years. In order to analyze and compare the global or regional climate, it is necessary to use the data of the same era.

Variation characteristics

1, temperature

Judging from the annual climate change, in the past 30 years, except for most areas in Sichuan Basin, a few areas in Yunnan-Guizhou Plateau and a few areas in the northeast of Qinghai-Tibet Plateau, most parts of the country have shown a warming trend. The national average temperature tendency rate is 0.248℃/ 10a, and the average precipitation tendency rate is 9.207mm/ 10a.

Step 2 precipitate

Among them, precipitation is an important element of climate. 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.