Author: Lang Lang
When I opened my eyes this morning, many friends in Beijing were shocked!
The earthy world... the sandstorm that hasn't been seen for a long time is coming again!
Not only Beijing, but many places in the north have experienced the strongest sandy weather this year.
The Central Meteorological Observatory issued a yellow dust storm warning at 06:00 on March 15. It is reported that sandstorms occurred in parts of western Inner Mongolia, Hexi of Gansu, northern Ningxia, northern Shaanxi, northwestern Shanxi, central and northern Hebei, and Beijing.
On March 15th, there was a dusty weather in Beijing, with visibility of less than 1,000 meters in most areas.
Photo by Cheng Chunyu, a reporter from China News Service
The strongest dust weather is coming!
In Beijing this morning, even if you wear a mask, you can smell the smell of earth in the air. The sand seems to reach people's throats. Even if you are indoors, you can smell the smell of dust.
A set of pictures to get a feel:
On March 15th, there was a dusty weather in Beijing, with visibility of less than 1,000 meters in most areas.
Photo by Cheng Chunyu, a reporter from China News Service
On March 15, the turret of the Forbidden City in Beijing.
Photo by Chen Weiyi
On March 15th, there was a dusty weather in Beijing, with visibility of less than 1,000 meters in most areas.
Photo by Cheng Chunyu, a reporter from China News Service
On March 15th, there was a dusty weather in Beijing, with visibility of less than 1,000 meters in most areas.
Photo by Cheng Chunyu, a reporter from China News Service
On March 15th, Beijing welcomed the sand and dust to cool down, and the air visibility weakened.
Photo by Li Peiyun, reporter of China News Service
On March 15th, Beijing welcomed the sand and dust to cool down, and the air visibility weakened.
Photo by Zhai Lu, China News Service
According to the Central Meteorological Observatory, affected by the Mongolian cyclone and strong cold air winds, a wide range of sandstorms, blowing sand and floating dust occurred in the midwestern part of Inner Mongolia and northwestern Hebei on the night of the 14th. The visibility was about 1 km and the local area was less than 300 meters.
Affected by the transportation of sand and dust upstream, the concentration of PM10 in Beijing increased significantly on the morning of the 15th, and a sandstorm occurred in Beijing.
According to the monitoring data of the Beijing Ecological Environment Monitoring Center, the PM10 concentration in most areas currently exceeds 2000 micrograms/m3, and the Haidian Sijiqing Station reaches 3572 micrograms/m3.
The visibility in most areas is 300-800 meters.
According to the Beijing Ecological Environment Monitoring Center, this is the largest and strongest sand dust this year. PM10 in the core area of the sand dust is close to 10,000 micrograms per cubic meter.
On the morning of the 15th, Beijing’s PM10 was heavily polluted. Source: Beijing Municipal Ecological Environment Monitoring Center’s official website
According to the website of the Beijing Municipal Ecological Environment Monitoring Center, 6 districts of the city with PM10 concentration at 9: 8108; northwest: 6877; northeast: 3461; southeast: 5953; southwest: 7530.
The Beijing Meteorological Observatory issued the gale blue and sand dust blue warning signals at 17:15 and 17:20 on the 14th, and upgraded the yellow sand and dust storm warning signals at 7:25 on the 15th.
It is expected to be affected by strong cold air. On the 15th, there will be northerly winds of magnitude 4 and 5 and gusts of magnitude 7 and 8. The sandstorm will continue until the afternoon of the 15th, and gradually weaken in the evening, and the wind at night will decrease and visibility will improve.
Affected by southerly winds on the 16th, sand and dust may return, and the PM10 concentration increased for a short time.
At present, the Beijing Municipal Education Commission has issued the latest notice that all district education commissions, directly affiliated schools, secondary vocational schools, and off-campus educational institutions have suspended outdoor activities and implemented health protection.
On March 15th, Beijing welcomed the sand and dust to cool down, and the air visibility weakened.
Photo by Zhai Lu, China News Service
Dust originated in southern Mongolia and affected 12 provinces in my country
The impact of this round of sand and dust weather is not small, and Beijing is just one of the "victims."
According to the Central Meteorological Observatory, large areas of yellow sand have appeared in 12 provinces and cities in the north.
From the 14th to the 15th morning, affected by the cold air, sand or floating dust occurred in the western part of the southern Xinjiang Basin in Xinjiang, central and western Gansu, Inner Mongolia and northwestern Shanxi, northern Hebei, and Beijing, and sandstorms occurred in some areas.
According to the Beijing Eco-Environment Monitoring Center, the dust originated in southern Mongolia.
According to reports, from 20:00 on March 14th to 06:00 on March 15th, the remote sensing map of sand and dust in the northern region showed that: the sand and dust that originated in southern Mongolia last night gradually moved southward with the air flow, and affected from north to south at 3 o'clock in the morning. Beijing.
Zhang Bihui, director of the Environmental Meteorological Center of the China Meteorological Administration, said at the news briefing on the morning of the 15th that there are two main reasons for the sand and dust weather.
In the early stage, temperatures in Mongolia, including northwest my country, were significantly higher, generally 5-8°C higher. In addition, most areas of Mongolia have had relatively few recent precipitation, and surface conditions are very conducive to the occurrence of sand and dust weather.
In addition, affected by the strong Mongolian cyclone, gusts of magnitude six to eight occurred in northern Xinjiang, central and western Gansu, most of Inner Mongolia, and northern North China, which provided very good heat and power for this dusty weather. A condition.
The Central Meteorological Observatory upgraded the sand and dust storm warning to yellow warning on the morning of the 15th: It is expected that from day to night, 12 provinces and cities including Xinjiang, Inner Mongolia, Gansu, Ningxia, Shaanxi, Shanxi, Hebei, Beijing, Tianjin, Heilongjiang, Jilin and Liaoning will see obvious Sand and dust weather, sandstorms in some areas.
This is also the most intense sandstorm process in my country in the past 10 years, and the range of sandstorms is also the widest in the past 10 years.
The shelter forest opened its mouth, blowing away the smog and ushering in a sandstorm? Response from China Meteorological Administration
Regarding the sandstorm, some people argued that the shelterbelt had opened an opening, blowing away the smog and ushering in a sandstorm.
In this regard, Zhang Bihui, director of the Environmental Meteorological Center of the China Meteorological Administration, said on the 15th that the shelter forest is mainly some changes in the surface vegetation near the ground. Its impact on the entire wind field is very limited, and for this very strong weather process, Compared with the intensity of this kind of weather, the impact of the shelter forest is also very low and can basically be ignored. Therefore, the impact of this shelter forest on the wind and then affect the sand and dust weather, we think this impact is very small, basically negligible .
How to protect against sandstorms?
The basic principles of personal protection are: avoid sand and dust, protect eyes and protect respiratory tract.
Closing doors and windows is the most effective way to avoid sand and dust.
Try to minimize going out during sandstorms or sandstorms.
In addition, we must improve indoor hygiene and keep the air clean.
If conditions permit, the humidifier can be turned on to increase the indoor air humidity and promote the sedimentation of indoor particulate matter.
Avoid outdoor activities as much as possible within a few days after the sandstorm or sandstorm has passed (especially on the second day).
Personal protection for outdoor activities should pay attention to: It is best to wear dust masks, dust gloves, gauze, windproof glasses, footwear, dust masks, and skin care products to reduce dust on the skin, nose and mouth. hurt.
Clean the skin, eyes, mouth, and nasal cavity of the residual dust immediately after returning home.
Once the sand is blown into the eyes, do not rub it with your hands, but consider rinsing with water or pure water.
Wearing ordinary glasses also has a certain protective effect, but contact lenses are prohibited.
If you have chronic cough with sputum or shortness of breath, episodic wheezing and chest pain, you need to call for professional medical services as soon as possible.
Drawing: Lei Yuzhu