Where does the sandstorm in Beijing come from? 2021March 15 Beijing issued a yellow warning for sandstorms.

This morning, Beijing was hit by a sandstorm, and there was obvious dusty weather. At present, Beijing has issued a yellow warning for sandstorms. Citizens and friends who travel must pay attention to safety and take precautions. Let's take a closer look at this sandstorm.

Where does the sandstorm in Beijing come from?

Meteorologists said that since March, the temperature in northern China has been high, and meteorological conditions are generally conducive to the formation of sandstorms. The dust that affects northern China mainly comes from Mongolia. With the strong development of Mongolia cyclone (the central air pressure was 980 hectopascals at 02: 00 on June 2, 5438+05), the dust moved eastward and southward with the cold high pressure at the back of the cyclone, affecting most parts of northern China.

At present, the primary pollutant in Beijing is PM 10, and the pollution level is level 6, so the air quality has been seriously polluted.

According to reports, in March, the annual average number of dusty days in the observatory (198 1 to 20 10) was 2.4 days, with a maximum of 12 days (1954), and a maximum of 9 days since 2000, appearing in

The last sandstorm occurred on April 20 15 15. There will be sand blowing weather on March 18, 2020.

Yellow Warning of Sandstorm in Beijing on March 6th 5438+05

Affected by cold air, Beijing will experience a windy and dusty weather today (March 15). It is estimated that there are 4~5 northerly winds in most areas, and the gusts can reach 7~8. It is expected that the weather will gradually improve in the afternoon. Residents planning to go out in the morning should take measures to prevent wind and sand, stay away from billboards and temporary structures, and pay attention to traffic safety.

Yesterday, the atmospheric diffusion conditions and visibility in Beijing were poor, and some areas were still disturbed by light fog at night. At about 17: 00 in the afternoon, Beijing Meteorological Observatory issued a blue warning of strong wind and dust to remind citizens and friends to pay attention to wind and dust. According to on-the-spot monitoring, dusty weather has appeared in Beijing, and the concentration of PM 10 has obviously increased. According to the Beijing Ecological Environment Monitoring Center, as of 7: 00 a.m., the air quality in most parts of Beijing was at the level of light pollution and above, and in many places in the northwest was at the level of serious pollution, and the urban area was basically at the level of moderate pollution, and the outdoor sky was yellow.

According to the forecast released by the Beijing Meteorological Observatory at 6: 00 this morning, Beijing is cloudy and sunny this morning, with dust, northerly winds of 4-5, gusts of 7-8, and the highest temperature15; At night, the north wind is 3~4 (gust is 6~7), and the minimum temperature is 2. At present, Beijing has issued a yellow warning for sandstorms.

It is expected that this windy and dusty weather will start in the morning and gradually improve in the afternoon. However, during the sandstorm, the wind is strong and the visibility is obviously reduced. The public should pay attention to traffic safety and stay away from billboards and temporary structures to avoid accidents.

In addition, when sandstorm weather strikes, the public should pay attention to using hats, shawls, masks, glasses, etc. To stop sandstorms and prevent dust particles from entering the mouth, nose and eyes, causing discomfort; Moreover, when dust strikes, the air is often dry, and the human body is prone to discomfort such as dry throat, chapped lips and itchy skin. Pay attention to drink more water, eat more fruits, and quickly replenish the water lost by the body.