The temperature drop in Beijing, Shanghai and other cities 18 will exceed 10℃. How long will this cold air last?

According to the latest temperature forecast, the cumulative cooling range from165438+1October 19 to 22nd will exceed 10℃ in capital cities and municipalities such as Beijing, Shanghai, Tianjin, Hangzhou, Wuhan, Nanjing and Harbin. Welcome rain, snow, strong winds and cool weather. The temperature in nearly 20 provinces and cities in China is over 10℃, and there will be heavy snowfall in the northeast. There may be a blizzard in Heilongjiang, and there will be 4~6 northerly winds in nearly 20 provinces and cities. On June 20th, 19 cold air will bring 4~ 10℃ cooling to Xinjiang, central and western Inner Mongolia, Qinghai, Gansu, Ningxia and other places, and then the central and eastern regions will usher in the core cooling period on June 22nd, 21-22nd.

? Cold air begins in the Arctic Ocean and then strengthens in Siberia. Because these areas have high latitudes, long nights in winter, short days and little sunshine, there will even be extreme nights in the polar regions and the sun will never appear. In this way, the heat energy obtained by the earth from the sun is very weak; However, at night, the ground will lose a lot of heat. As the ground temperature drops, the temperature will gradually drop, and cold air will gather together. Due to the guidance of the northwest wind, the cold air with extremely low temperature will push from north to south, affecting most parts of China.

? Wear it in cold weather? Thin on the top and thick on the bottom? It's not sultry in itself, but it just acts as isolation. Wearing too thick will inhibit the adaptability of body temperature regulation and weaken the ability to keep out the cold. At the same time, the doctor suggested paying attention to clothes in winter? Thin on the top and thick on the bottom? If the lower body can keep warm, the upper body won't feel too cold. Wearing a mask should not be too long, and there are a lot of capillaries in the nasal mucosa that can humidify cold air. After cold air is inhaled into the lungs through the nasal cavity, it is generally close to body temperature. If you wear a mask all day, the nasal mucosa and the whole respiratory tract will easily catch a cold without exercise. Implement winter? Nine defenses? Security check. It is easy to catch cold in cold season, causing respiratory tract infection and sudden change of weather, which can induce bronchial asthma attack. This inflammation can lead to recurrent symptoms, such as wheezing, shortness of breath, chest tightness and cough.