The temperature of May Day solar terms in Tai 'an, Shandong Province

Tai 'an City belongs to the temperate continental semi-humid monsoon climate zone, with four distinct seasons, suitable for cold and summer, synchronous light and temperature, and the same season of rain and heat. Spring is dry and windy, summer is hot and rainy, autumn is sunny and cool, and winter is cold and snowy. ?

The annual average total solar radiation in the city is 12 1.58 kcal/? Square centimeter, annual variation112-131calories?

/cm2. In a year, May is the most, and 65438+February is the least. According to the 80% assurance rate, the total annual radiation is 1 17.9% kcal/cm2. During the period of crop production and development from March to June, 165438+ 10, there will be/kloc-0.02 billion kcal/ha of energy available.

The annual average sunshine hours are 2627. 1 hour, with annual variation in?

2342.3-34 13.5 hours. The sunshine percentage is about 58%. In a year, wheat grouting is the most frequent in May and June, with an average of about 268 hours per month.

Conducive to wheat growth.

The annual average gas low temperature in the city is 12.9℃. The highest in July, with an average of 26.4℃, and the lowest in 65438+ 10, with an average of -2.6℃. The extreme maximum temperature is 465438 0℃, and the extreme minimum temperature is -27.5℃. In terms of geographical distribution, it is higher in the south and west, and lower in the east and north. The annual average accumulated temperature is ≥0℃ 473 1℃, ≤ 10℃ 42 13℃, and the average frost-free period is 195 days, with the longest 24 1 day and the shortest 1 day. The temperature is suitable, and intercropping can meet the needs of two crops a year or three crops a year.

The average annual precipitation in this city is 697mm. Due to the influence of monsoon climate, the interannual precipitation changes greatly, with the annual maximum precipitation 1.498mm and the annual minimum precipitation 1.99mm, with a difference of 7.5 times. Due to the terrain, the precipitation in the east is more than that in the west, and the precipitation in the mountainous area is more than that in the plain. The average annual precipitation in the eastern mountainous area is 700-750 mm, and that in the western plain is 600-650 mm. The general trend is to gradually decrease from northeast to southwest. The distribution of precipitation is very uneven during the year. The highest precipitation in summer accounts for 65.2% of the annual precipitation, and the lowest precipitation in winter only accounts for 3.6%. In a year, July is the most, accounting for 32. 1% of the annual precipitation. The same season of rain and heat is very beneficial to the growth and development of crops and fruit trees, and the least month is 1, accounting for only 0.96%.

Affected by topography, landforms, vertical changes and regional differences, some local microclimate areas have been formed. The average annual temperature at the top of Mount Tai is only 5.2℃, and the annual precipitation reaches 1 163.8 mm; The annual average temperature of high-temperature residential areas in front of Culai Mountain and beside Chaiwen River is above 14℃, which is three or four Baidu higher than the city average and reaches the subtropical standard. These different types of microclimate zones have produced many famous and special products.

Analysis of Climate Background in Taian City

Tai 'an City belongs to the warm temperate semi-humid monsoon climate zone, with four distinct seasons, suitable for cold and summer, synchronous light and temperature, and the same season of rain and heat. Spring is dry and windy, summer is hot and rainy, autumn is sunny and cool, and winter is cold and snowy.

Tai 'an has a mild climate, with an average annual temperature of 12.8℃, with higher temperatures in the south and west and lower temperatures in the east and north, with an average frost-free period of 195 days. The average annual precipitation is about 680mm. Due to the influence of monsoon climate, the interannual precipitation changes greatly, and the distribution of precipitation during the year is very uneven. The summer precipitation is the most, accounting for 65% of the annual precipitation, and the winter precipitation is the least, accounting for only 3.6%. Affected by the terrain, the precipitation in the east is more than that in the west, and the precipitation in the mountains is more than that in the plains. The general trend is gradually decreasing from northeast to southwest. The altitude of Mount Tai in China is 1545 meters, which has obvious alpine climate characteristics. The temperature at the top of the mountain is generally 7 ~ 8℃ lower than that at the foot of the mountain, and the average annual precipitation exceeds1000 mm.