What is the general temperature after the autumnal equinox? -Is it hot after the autumnal equinox in 2022?
Is it hot after the autumnal equinox in 2022?
It's usually not very hot after the autumnal equinox. The autumnal equinox is the fourth solar term in autumn, which is already located in late autumn. There are few high temperatures exceeding 35 for seven consecutive days, and the temperature is generally around 25 degrees, which is in a cool autumn environment. Around the autumnal equinox is the most suitable time for autumn outing. It is recommended to take family and friends out for a walk and breathe fresh air.
Climatic characteristics of solar terms in autumnal equinox;
North and South are two paradise.
Usually in the autumn equinox, a few places in Xinjiang, Qinghai, Sichuan, Tibet, Inner Mongolia and Heilongjiang have entered early winter. Snowflakes sometimes appear in Mohe and Huma in the northernmost part of China, Hailar in the northern part of Inner Mongolia, Ganzi and Songpan in the western part of Sichuan. Some areas in Heilongjiang, Jilin and Liaoning have entered the late autumn season. People climb high and look far, and come to the dense forests in mountainous areas to enjoy the layers of autumn colors. From southern Liaoning to the south of the Yangtze River, people enjoy the coolness brought by autumn.
In Guangdong, Guangxi, Hainan and other places in South China, the average daily temperature is still above 22℃, people are still blowing air conditioners and eating watermelons, and they still haven't walked out of the long summer, but there are not many humid and sultry weather in summer, and there will be several thunderstorms when strong cold air moves south.
Jiangnan welcomes Xiaoyangchun
After the autumnal equinox, the warm air (subtropical high) that once occupied the mainland continued to withdraw southward. Cold air will soon become the dominant force in most parts of China. As the saying goes: "A thousand years is divided into autumn nights, and one night is cold." With the southward movement of cold air, most of the south of the Yangtze River has entered autumn in general (the average daily temperature for five consecutive days is ≤22℃). The "autumn tiger" disappeared and people began to enjoy the good weather in a year. In Jiangsu and Zhejiang, people use all beautiful words to describe it, such as golden wind, light cloud, sweet-scented osmanthus, crab fat and chrysanthemum yellow.
Enter the period of decreasing precipitation.
After the autumnal equinox, the number of rainy days and rainfall in most parts of China, including Jiangnan and South China (except the rainstorm caused by tropical cyclones) entered a period of decreasing precipitation, and the water levels of rivers and lakes began to decline, and some seasonal rivers and lakes even dried up gradually. During this period, there may be individual tropical cyclones, but the impact location is south, mostly affecting the coastal areas of South China and Hainan Island. At this time, in addition to the gale disaster, the rainfall brought by typhoon is often beneficial to local soil moisture conservation, because these areas will turn into dry season after 10.
Autumn rain in western China, a disastrous weather affecting agriculture.
9, June 5438+00, due to the cold and warm air confrontation, the western part of China (Weishui, Hanshui River Basin, most of Sichuan, Guizhou, eastern Yunnan, western Hunan, western Hubei) often appears continuous autumn rain, and some even last for ten days or dozens of days. Especially in Sichuan basin, it happens almost every year, and it often rains at night. Li Shangyin, a famous poet in Tang Dynasty, wrote a poem "Roses Raining at Night in Autumn Pond", which is a vivid description of this situation. It is rainy in autumn, and the wet damage is serious, which has a great influence on autumn harvest, autumn ploughing and autumn planting. It is necessary to grasp the sun, control soil moisture and prevent waterlogging, and do a good job in the quality and progress of Sanqiu production. At the same time, we can make full use of the meteorological conditions of less rain and good soil moisture in autumn, do a good job of afforestation without losing time, and strive to improve the survival rate of saplings.
Disasters affecting agriculture, cold weather and dew wind
Cold dew wind is a chilling injury caused by the invasion of cold air in autumn, which affects the heading, flowering, filling and yield reduction of late rice. Due to the different time and intensity of strong cold air every year, cold dew winds mostly appear in the middle and lower reaches of the Yangtze River in South China, the autumn equinox in northern Guangxi, northern Guangdong, northwestern Fujian and central Fujian. The standards in different places are not exactly the same. Usually, the daily average temperature in the middle and lower reaches of the Yangtze River is lower than 20℃ for three consecutive days or more as the standard of cold dew wind; The average daily temperature in South China is below 22℃ for three consecutive days or more.
The first frost is not surprising.
As the saying goes, "the geese bloom in August, and the frost is at their feet." It is not surprising that frost occurs at the autumnal equinox in parts of northwest and northeast China controlled by continental cold high pressure. The arrival of the first frost marks the end of the growing period of crops, and agricultural production begins to enter the busy period of autumn harvest. However, not all plants can't stand the cold. Chrysanthemums and maple leaves standing proudly in the autumn wind constitute a beautiful picture of "yellow flowers with golden eyes and red leaves with scales". At the same time, with the arrival of the first frost, people in these areas can enjoy the autumn scenery in advance.
The influence of fog should not be underestimated.
Entering the autumnal equinox, foggy weather began to increase, mainly radiation fog.
Radiation fog is a fog formed by the condensation of water vapor in the air layer near the ground due to the radiation cooling effect of the ground. It often appears at night or in the early morning, partly cloudy, sunny and breezy. In autumn and winter, this kind of fog often appears in the inland areas of China. Radiation fog often covers a large area and spans several provinces, which not only easily causes urban traffic congestion, but also affects the normal operation and safety of expressways, inter-provincial national highways, aviation and railways.
Agricultural activities:
The characteristics of rapid cooling in autumn make "Sanqiu solar terms for health" particularly tense in the busy autumn harvest, autumn ploughing and autumn planting. The autumnal equinox is a good time to harvest cotton and tobacco leaves from green to yellow. Winter wheat has been planted in North China, and the Yangtze River basin and vast areas in the south are busy harvesting late rice and ploughing the land to prepare for rape sowing. Drought and lack of rainfall or continuous rainfall in autumn equinox are the main unfavorable factors affecting the normal operation of Sanqiu, especially the continuous rainfall will make the upcoming crops lodging, mildewing or sprouting, resulting in serious losses. "Sanqiu" is a great help, and the word "early" is the key. Timely harvest of crops in autumn can avoid the harm of first frost and continuous rain, and timely sowing of crops in winter can make full use of heat resources before winter, cultivate strong seedlings to survive the winter safely, and lay the foundation for high yield in the coming year.