https://china.findworkabroad.com/viewarticle/1

According to the studies that were conducted in the past months, the fabricated pollution in the cities of China worsens now when less dust blows in from the Gobi Desert. Even though it might seem like a confusing affirmation, it was found that in the moment, the dust plays an important role in determining temperatures, thereby promoting winds to blow away man-made pollution. By less dust, it actually means that the air stagnates, with the fabricated pollution becoming more concentrated and sticking around for a longer period of time.

The scientists found that the reduced dust causes a 13 percent increase in the man-made pollution over Eastern China during the winter. However, the broader question of how natural dust and pollution produced by people interact, represents an important issue for all the people around the globe. Many of the same forces that ease or worsen pollution in China are at play in many areas around the globe, to include several cities in the United States.

The team of researchers found that reduced natural dust transported from the Gobi Desert to the Central and Northern China, translates into increased man-made air pollution in the highly populated Eastern China. The natural dust particles found in the air help deflect sunlight. Hence, fewer dust particles translates into a warmer-than-usual land surface and cooler-than-usual water. Because of this, the differential temperature is reduced during winter, between the sea and the land, resulting in weaker winds, along with increased air stagnation. The result is the fact that Eastern China experiences weaker winds during the monsoon season, when there is less natural dust in the air.

The modeling results match the observational data from dozens of sites in Eastern China. The team eventually discovered that two to three days after the winds had brought dust into the region of Western China, the air was cleaner than before the dust arrived. In conclusion, it is very important to understand the role of the natural dust particles.

 

Sources:

https://phys.org/news/2017-05-natural-air-quality-eastern-china.html

https://scripps.ucsd.edu/news/more-natural-dust-improves-air-quality-eastern-china

http://www.sciencenewsline.com/news/2017051115590006.html