China Weather Network News Today (October 10), China entered the frost solar term, which is the last solar term in autumn and the largest temperature difference between day and night in most of China's autumn and winter. At this time, cold air frequently affects China, autumn steps will cross the Yangtze River, temperature fluctuations, China Weather Network launched a national jaywear map, see where to change two seasons a day, dressing rhythm chaotic to fine.

【National Jaywear Map】Frost season Many places in the north have two seasons a day

Frostfall is the last solar term of autumn, when most of the north is already in full swing, cold air appears frequently, and some areas begin the autumn and winter transition. Zhang Juan, a meteorological analyst at China Weather Network, introduced that frost is also the largest solar term between day and night temperature difference in autumn and winter in China, at this time, the sky is less cloudy, the sunlight is online during the day, the solar radiation heat is lower than the summer, the night sun is offline, the "insulation" effect of the clouds is poor, and the temperature drops rapidly.

According to the national jaywear index map launched by China Weather, during the perennial frost and solar term, the temperature difference between day and night can exceed 15 °C in central and southern Xinjiang, Ningxia, northern Qinghai, northern Shaanxi, southern Shanxi, western Sichuan, and parts of Tibet. The cold air in the above areas is often "visited", the temperature fluctuates greatly, coupled with the high altitude, the heat loss at night is fast, and a single coat during the day is enough, but in the morning and evening, you need a thick coat, cotton jacket and other winter clothes to keep warm.

In Northeast China, Inner Mongolia, North China, Huanghuai and most of Tibet, Yunnan and Jiangxi, the temperature difference between day and night is between 10 and 15 °C, and the weather is hot and cold. Especially in North China, Huanghuai and other places, sunny days, solar radiation warms up quickly during the day, long-sleeved T-shirts can be, but the temperature is low in the morning and evening, you may wish to adopt an onion style dressing method when you go out.

Most of Jiangsu, Shanghai, Hunan, Guangdong, Guangxi and Guizhou and Chongqing have a temperature difference of less than 10 °C, and the maximum temperature in these places may still be above 25 °C.

【Frosty weather】Frost of grass and trees Many places in North China have entered the embrace of winter

Large temperature fluctuations are one of the weather characteristics of the frost season, when the cold air is not only active, but also has a strong autumn and winter attribute, often bringing strong winds to cool down.

During the frost season, the temperature difference between day and night in many places in the north can exceed 15 °C, and the minimum temperature in many places such as Northeast China and Inner Mongolia can drop below freezing, and it is chilly to go out in the morning and evening.

As the temperature drops, the territory in winter begins to expand, with Inner Mongolia, most of the northeast, Shanxi, northern Hebei and other places entering winter, and the autumn frontier can reach the south of Jiangnan as far south.

The decrease in temperature is one of the important factors for the "makeup" of autumn leaves, entering the frost, the autumn colors in the north and south of China's great rivers are gorgeous, and tree species such as Yuanbao maple, yellow chestnut, sumac tree and other tree species enter the best viewing period.

Most of the North Has Seen the First Frost The south is busy in the "three autumns."

There are three periods of frost, one waiting for the jackal to be a sacrificial beast, the second waiting for the grass and trees to fall yellow, and the third waiting for the sting to bow down. At this time, the weather is getting cold, many places are gradually transitioning to winter, the leaves gradually wither and fall, and the stinging insects also begin to stop eating and enter a state of hibernation.

By the time of frost, the first frost line can reach the south of Huanghuai, and most of the north has seen the first frost, of which southeast Hebei, Shandong, Henan and other places will have the first frost weather during the frost period. The autumn harvest in the north has come to an end, and most of the south is still an autumn scene, which is the busy season of "three autumns". "Frost falls to grab autumn, if you don't grab it, you lose it." At this time, agricultural affairs are expensive in "just in time", and crops such as cotton and late rice need to be harvested in time to prevent frost damage.

【Frost custom】Climb high to admire chrysanthemums, eat persimmons to taste autumn taste

There are many frost customs, climbing high and overlooking, viewing autumn leaves, eating persimmons, admiring chrysanthemums... At this time, autumn is high and cool in many places in China, and people can see thousands of miles and enjoy the colorful and gorgeous autumn colors. And before and after the frost falls, when the persimmons are ripe, as the saying goes, "the frost does not pick persimmons, hard persimmons become soft persimmons." ”

It is late autumn, most of the precipitation in China is scarce, the air humidity is low, and it is a period of high incidence of respiratory diseases. Eating more foods with high vitamin content such as pears and apples can play a role in coughing and moisturizing.

The autumn colors of the frost season are like a blooming flower, and it has reached its most brilliant moment. In addition to the beautiful scenery limited to autumn, nature has also given us the gift of the tip of the tongue, and the unique autumn foods such as chestnuts and persimmons enter the best flavor tasting period. With gratitude, let us grasp the tail of autumn and keep the beauty of autumn in our hearts. (Text/Jiang Yi Design/Ren Chengying Data Support/Zhang Juan)