What is the primary pollutant in sandstorm weather?

On March 22nd, 2065438+00, Zhangzhou was obviously sunny, but it was foggy. The sky is grayish yellow, the air is turbid and full of dust.

"Why is the sky yellow? Is it fog or sandstorm? " "Our whole village is shrouded in dust, and we can scrape a layer of sand from the floor wherever we go." ……

On March 22, the sky in Zhangzhou was gray all day, and the tall buildings in the distance became looming. The editor of Lawang learned from the Internet that the smog weather that has not been seen for a long time has appeared in Zhangzhou again.

The air in downtown Zhangzhou is full of dust, as if covered with a layer of yellow smoke, and the visibility has dropped a lot.

Many careful citizens will also find a thin layer of dust on the surface of cars parked outdoors. As onomatopoeia

According to the staff of the Meteorological Observatory, smog refers to the turbidity caused by the suspension of a large number of particles such as smoke and dust. Its core substance is dust particles suspended in the air, which is called aerosol particles in meteorology.

According to the observation data of the Meteorological Observatory, there is floating dust and haze weather in our city today.

Affected by this weather, today's urban air quality is slightly polluted, and the pollution index has reached the recent highest 120 or above. The primary pollutant is inhalable particulate matter.

The following is the latest shot of the dust scene in Zhangzhou sky:

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Sandstorms come from the north.

The sandstorm weather in the north is rampant, and the dust from the south accompanied by the cold air in the north has caused smog weather in southern cities such as Nanjing, Guangzhou and Hangzhou and some coastal cities in our province. .

After the dust arrived in our city, due to the low wind speed in the city, it could not spread in time and gathered near the ground to form smog. Affected by this, the visibility of the urban area was less than 3000 meters yesterday.

The municipal meteorological department said that this morning, it continued to be affected by the dusty weather in the north, and it is expected that there will be haze weather with visibility less than 3000 meters in our city.

In this weather condition, most of the particles in the air can be inhaled by the human body, so it is easy to cause respiratory diseases.

To this end, the meteorological department suggested that patients with respiratory diseases should pay attention to prevention, minimize outdoor activities, open fewer doors and windows at home, and maintain a certain humidity indoors as much as possible. Drivers and passengers should pay attention to traffic safety.

Tomorrow afternoon, with the cessation of the cold air in the south and the gradual strengthening of the southwest airflow, the smog will gradually disperse, the air will gradually become moist, and the foggy day may reappear.

Fujian issued "smog warning"

Although it is sunny today, the sky in Fuzhou is grayish yellow, the air is turbid and full of dust. Affected by the strongest sandstorm weather in the north this year, Fujian coastal cities are shrouded in pale yellow sand fog. Today, the provincial meteorological observatory issued the yellow "smog warning" for the first time. happy

Today 16, the provincial meteorological observatory issued the yellow warning signal for the first time. Xia Lihua, a senior engineer in the Short-term Forecast Department of the Provincial Meteorological Observatory, said that Fuzhou, Xiamen, Quanzhou, Putian, Zhangzhou and Ningde were all hit by smog, which is rare in the history of Fujian Province. "This is related to sandstorms in the north." Meteorologists in Fujian Province said that in the past few days, severe dusty weather has occurred in all parts of the north, and cold air in the south has brought a lot of suspended particles. In addition, there are many suspended particles such as dust and smoke over the city, and the wind speed is not strong enough to spread in time, so they gather near the ground and form smog.

Quanzhou is greatly affected by sandstorms.

Quanzhou Meteorological Bureau revealed that sandstorms have become a spent force from north to south, but there was no rain in Quanzhou yesterday, resulting in more dust and suspended particles in the air. "There are generally five to six winds in urban areas. Nan 'an is located in the coastal area, and the wind force is four to five, so the life of local citizens will be greatly affected by dust. "

At 4 o'clock yesterday afternoon, Fujian Meteorological Observatory issued a yellow warning signal for the first time. Xia Lihua, a senior engineer in the Short-term Forecast Department of Fujian Meteorological Observatory, said that Fuzhou, Xiamen, Quanzhou, Putian, Zhangzhou and Ningde were all hit by smog, which is rare in the history of Fujian Province.

"This has something to do with sandstorms in the north." Meteorologists in our province said that in the past few days, severe dusty weather has occurred in all parts of the north, and cold air in the south has brought a lot of suspended particles. In addition, there are many suspended particles such as dust and smoke over the city, and the wind speed is not strong enough to spread in time, so they gather near the ground and form smog.

The reporter learned from Quanzhou Meteorological Bureau that Quanzhou will continue to be affected by smog weather today, but the situation will improve. A spring rain in these two days will hopefully "wash away" the dust in the air. In addition, with the influence of cold air gradually weakening and the coastal wind weakening, the weather in Quanzhou will be mainly cloudy today, and the temperature will gradually rise, with an average temperature of 15℃ ~ 24℃. The weather conditions in Quanzhou in the next three days are as follows: the average temperature on March 23 16℃ ~ 27℃, with fog or light fog at night; Cloudy to showers on March 24th, with an average temperature of18℃ ~ 25℃; There was moderate rain on March 25th, and the average temperature was 13℃ ~ 18℃.

Panshan Road, Gushan, Fuzhou: Overlooking the downtown area, it is gray.

Yesterday afternoon, the reporter looked down at the downtown area of Fuzhou on the Panshan Highway in Gushan, and his eyes seemed to be covered with a thin layer of yellow gauze. You could have overlooked Guangming Port of Minjiang River. At this time, I can only vaguely see the Third Ring Road under construction. The buildings along the Minjiang River in the distance seem to be "a mirage" and become illusory. In the observation deck near the Yongquan Temple in Gushan, the whole Fuzhou is shrouded in "yellow fog", which is gray and there is no building at all. Looking down at Fuzhou from Beifeng, it is also gray, and the urban area can't be seen clearly.

A taxi driver said that there is a lot of fog on weekdays, but such "dirty" and "yellow" fog is rare.

The staff of Fuzhou Meteorological Observatory said that today, Fuzhou issued a yellow "smog warning" for the first time.