China News Agency, Beijing, June 21 (Reporter Chen Su) Since mid-to-late June, many places in northern China have experienced "scorching" weather for many days, and the temperature in many places has exceeded 40 ℃.
At 17:14 on June 21, China ushered in the summer solstice solar term, which also marked the official start of the hot summer. With the arrival of the summer solstice, will the high temperature continue to increase in the future?
Data map: Citizens in Xi'an, Shaanxi travel under the shade.
Photo by China News Agency reporter Zhang Yuan
Summer is big and extreme. The summer solstice marks the extremity of all things growing and flourishing. For the Tropic of Cancer and its north, the summer solstice is the day with the highest sun height at noon in the year and the shortest night in the year. The longest day.
From the summer solstice, after three "geng days", it will enter the hottest dog days of the year, that is, the so-called "summer solstice three Geng days". Therefore, the summer solstice also marks the beginning of hot weather.
After the summer solstice, the ground is heated strongly and the air convection is strong, and thunderstorms are often formed from afternoon to evening.
Before the arrival of the summer solstice, the north has already experienced a round of large-scale high temperature weather.
Since the 15th, high temperature has dominated the weather in many places in the north.
Up to now, the number of high temperature days in central Shaanxi and central and western Henan has reached 8, and high temperatures above 40°C are frequent.
From the 20th to the 21st, continuous high temperature weather occurred in southern Shanxi, central and southern Hebei, Henan, central and western Shandong, northern Jiangsu and Anhui, southeastern Inner Mongolia, and Shaanxi Guanzhong. ℃ or so.
Fang Chong, a national chief forecaster and a senior engineer at the research level of the Central Meteorological Observatory, told reporters that this round of high temperature weather lasted for a long time, had a high intensity and had a wide range of influence.
The long-term control of the warm ridge in northern China and the lack of active cold air have combined to create persistent high temperatures.
According to the law of solar terms, although the summer solstice means that the hot summer has come, it is not the hottest time, because the heat close to the ground continues to accumulate, and the temperature will continue to rise in the future, about July From mid to mid-August, all parts of China will experience the hottest weather of the year.
In June, many places in the north have experienced a wave of high temperature. What is the weather situation in the later period?
Fang Chong said that since the 22nd, the warm ridges that have long controlled northern China began to disappear, and the mid-level airflow was flat and with shallow troughs, which was conducive to bringing weak cold air in, which relieved the high temperature of Huanghuai in North China to a certain extent.
From the 22nd to the 24th, there will be a rainfall process in the above-mentioned areas, which will play a certain role in alleviating the local meteorological drought.
However, due to the influence of the subtropical high extending westward to the north, the continuous rainfall in the southern region will come to an end from the 23rd, and Jiangnan, South China and other places will also usher in high temperatures above 35°C, and the national high temperature range will be further expanded.
In ancient times, during the summer solstice, Chinese folk women would give each other objects such as folding fans and fat powder, and the royal family would take out ice "for winter and summer use" to "relieve the summer".
In terms of traditional diet, at the summer solstice, new wheat is on the stage, and people will eat noodles on this day, which not only means that the summer solstice is the longest day, but also means to celebrate the harvest.
Experts said that after the summer solstice, the sun rises outside, the human body sweats more, and the first thing to do is to replenish water in time for summer heatstroke prevention. You can eat more bitter gourd, celery, chrysanthemum, bitter chrysanthemum, etc., in order to dispel summer heat, invigorate qi, remove dryness and dampness, and promote body fluid. Quenching thirst and increasing appetite.
At the same time, do a good job of mental maintenance. It is advisable to go to bed late and get up early, take a timely lunch break, avoid strenuous exercise, and pay attention to regulating the mind and calming down.
Fang Chong reminded that in high temperature weather, people should try to avoid outdoor activities during high temperature periods, and those who work outdoors should shorten the continuous working time.
At the same time, as the utilization rate of air conditioners has risen sharply, and the temperature difference between indoor and outdoor is large, attention should be paid to the impact of sudden changes in temperature on health.
On the other hand, the demand for cooling in hot weather will also lead to a surge in electricity consumption. Relevant departments should prepare in advance to ensure energy supply, and pay attention to preventing fires caused by excessive electricity consumption and excessive electricity load.
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