What is the primary pollutant in sandstorm weather?
"Why is the sky yellow? Is it fog or sandstorm?" "Our whole village is shrouded in dust, and wherever we go, we can scrape a layer of sand from the floor." ......
On March 22nd, 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 haze weather that had not been seen for a long time reappeared in Zhangzhou.
the air in Zhangzhou city 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. La
According to the staff of the Meteorological Observatory, haze refers to the turbidity phenomenon caused by the suspension of a large number of particles such as smoke and dust, and its core substance is dust particles suspended in the air, which is called aerosol particles in meteorology.
the data observed by the meteorological observatory show that there is floating dust and haze in our city today.
Affected by this weather, the air quality in urban areas is slightly polluted today, and the pollution index has reached the highest level of more than 12 recently. The primary pollutant is inhalable particulate matter.
The following is a newly shot dust scene in Zhangzhou sky:
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attachment uploaded and downloaded at 17: 29 on March 22, 21 (2.9 KB)
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Sandstorm came from the north
Sandstorm weather is raging in the north, and the dust coming from the south with the cold air in the north has also caused haze weather in southern cities such as Nanjing, Guangzhou and Hangzhou in China and some coastal cities in our province. .
after the dust arrived in our city, it could not be spread in time because of the low wind speed in the city, so it gathered near the ground, thus forming haze, and the visibility of the urban area was once less than 3 meters yesterday.
the municipal meteorological department said that this morning, due to the southward influence of the dusty weather in the north, it is expected that there will be haze weather with visibility less than 3, meters in our city.
In this weather condition, most of the particulate matter in the air can be inhaled by the human body, so it is easy to cause respiratory diseases.
For this reason, the meteorological department suggested that when encountering haze weather, patients with respiratory diseases should take precautions, minimize outdoor activities, open fewer doors and windows at home, and keep indoor humidity as much as possible, and drivers should pay attention to traffic safety.
tomorrow afternoon, with the stop of cold air going south and the gradual strengthening of southwest airflow, the haze will gradually disperse, the air will gradually become moist, and foggy days may reappear.
Fujian first issued "haze warning"
Today, although the sun is shining, the sky in Fuzhou is gray and yellow, and the air is turbid, and it is soaked in sand and dust. Affected by the strongest sandstorm weather in the north this year, coastal cities in Fujian Province are shrouded in pale yellow sand fog. Today, the provincial meteorological observatory issued the yellow "haze warning" for the first time. Fu
At 16: today, the Provincial Meteorological Observatory issued a yellow warning signal for haze for the first time. Xia Lihua, a senior engineer in the Short-term Forecasting Department of the Provincial Meteorological Observatory, said that Fuzhou, Xiamen, Quanzhou, Putian, Zhangzhou and Ningde were all hit by haze, which was 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 the cold air from 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 large enough to spread in time, so it gathers near the ground, thus forming haze.
Quanzhou is greatly affected by sandstorms
According to Quanzhou Meteorological Bureau, sandstorms have become a spent force from north to south, but there was a strong wind and no rain in Quanzhou yesterday, resulting in more dust and suspended particles in the air. "There are generally five to six winds in the urban area. Nan' an is located in the coastal area, and the winds are also four to five, so the lives of local citizens will be greatly affected by dust."
At 4 o'clock yesterday afternoon, Fujian Meteorological Observatory issued a yellow warning signal for haze for the first time. Xia Lihua, a senior engineer in the Short-term Forecasting Department of Fujian Meteorological Observatory, said that Fuzhou, Xiamen, Quanzhou, Putian, Zhangzhou and Ningde were all hit by haze, which was 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 the cold air from 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 large enough to spread in time, so it gathers near the ground, thus forming haze.
The reporter learned from Quanzhou Meteorological Bureau that Quanzhou will continue to be affected by haze weather today, but the situation will improve. A spring rain in the past two days will hopefully "wash" the dust in the air. In addition, with the influence of cold air gradually decreasing 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℃. In the next three days, the weather conditions in Quanzhou are as follows: on March 23, the average temperature was 16℃ ~ 27℃, and there was fog or light fog at night; On March 24, it turned cloudy to showers, with an average temperature of 18℃ ~ 25℃; On March 25th, it was moderate rain with an average temperature of 13℃ ~ 18℃.
Panshan Road, Gushan, Fuzhou: Looking down at the downtown area
Yesterday afternoon, the reporter looked down at the downtown area of Fuzhou on Panshan Road, and his eyes seemed to be covered with a thin layer of yellow gauze. Originally, I could overlook Guangming Port of Minjiang River. At this time, I can only vaguely see the Third Ring Road under construction. The buildings near the Minjiang River in the distance seem to be "a mirage" and become illusory. At the observation deck near Yongquan Temple in Gushan, the whole Fuzhou is shrouded in "yellow fog", which is gray and there are no buildings at all. Looking down at Fuzhou from the north peak, it is also gray and can't see the urban area clearly.
A taxi driver said that there are many fogs on weekdays, but such dirty and yellow fogs are rare.
The staff of Fuzhou Meteorological Observatory said that today, Fuzhou issued a yellow "haze warning" for the first time.