COVID -19, a blessing in disguise to humans and mother earth. China is rapidly developing as evidenced by enhanced urbanization and industrialization and greatly increased energy consumption. However, these have brought Chinese cities a variety of urban air pollution problems in recent decades.
China is a huge country and has a great variety of climates. Winter is freezing cold in the north, in the mountains and the plateaus, while it’s mild in the south; summer is hot everywhere, except in highlands and high mountains. If we exclude the vast western desert areas, where rainfall is scarce and irregular, summer is the rainiest season. The rainiest part of the country is the south-east, while the least rainy is the north-west.
How it was!
Urban air pollution influences both the health of citizens and the development of cities. To control air pollution and protect the atmospheric environment, the Chinese government has implemented a variety of programs.
This paper first reviews the current status of air quality in Chinese cities, especially key cities, then describes the characteristics of some major urban air pollutants, including total suspended particles (TSP), respirable particles 10 microns or less in diameter (PM10), very fine particles 2.5 microns or less in diameter (PM2.5), sulfur dioxide (SO2), acid rain, NOx, and photochemical smog.
Two specific topics, SO2 and acid rain control and vehicle emission control, are used to illustrate the actions that the government has taken and future plans.
The latest reports
A developing storm will increase the risk for flash flooding across parts of eastern Asia through the second half of the week.
Periods of rain and thunderstorms will drench parts of China through the middle of the week as a storm system organizes over the country.
The storm will begin to move away from China and out over East China and Yellow seas through Wednesday night. This is when the first rounds of rainfall will arrive in the Korean Peninsula and into southern Japan.
“This system will pull plenty of mild air northward which will cause rain in nearly all locations,” stated AccuWeather Senior Meteorologist Adam Douty. “The exception will be snow atop the highest peaks of Japan.”
As is expected!
The heaviest rain for South Korea is expected on Thursday as the system brings a cold front across the area.
As the threat for heavy rain shifts east over southern Japan on Friday, drier and cooler air will arrive across the Korean Peninsula in the wake of the front.
The storm might hit!
Tropical moisture surging northward will bring heavy rain to Kyushu, Shikoku and western Honshu. Kyushu is expected to receive the heaviest rain with 150 mm (6 inches) forecast in some locations, according to Douty.
Elsewhere across the region, rainfall totals of 25-50 mm (1-2 inches) will be common from this storm. This amount of rain can lead to areas of flash flooding, especially in low-lying and poor drainage areas.
The risk for mudslides in rugged terrain will also increase.
Saturday may end up being the wettest day for locations along Japan’s southern coast, including Tokyo. The cold front is forecast to stall near the area as another storm develops along the front.
“Wind will also be kicked up across Japan as the storm passes,” Douty said. “Widespread wind gusts of 60-75 km/h (37-47 mph) are expected, with a few coastal locations seeing gusts to 100 km/h (62 mph). The strongest wind will be on Friday and Friday night as a cold front crosses the country.”