Sorry, you need to enable JavaScript to visit this website.

East Asia

Some of the largest changes in OMI NO2 levels between 2005 and 2014 occurred over China, Japan, and Korea.  Large increases occurred over the North China Plain of China, which is consistent with the country's booming economy over the last decade.  China's phenomenal economic growth has been fueled by the country's abundant coal reserves, but at the cost of air quality. However, the OMI data indicate that levels decreased over several of China's cities, including Beijing, Shanghai, Taipei, and the cities of the Pearl River Delta, including Hong Kong.  These cities have implemented ambitious environmental regulations to improve air quality.  National environmental regulations in Japan and South Korea have also lead to large decreases over their cities, as much as 40% over Tokyo, for instance.  Increases southwest of Seoul (Korea) are likely associated with intensive industrial infrastructure development, including petrochemical complexes.  Given that increases occurred over the ocean, it is possible that Chinese pollution impacted air quality in North Korea, South Korea and western Japan.

East Asia Regional Changes in NO2, 2005-2016

Image Credit: 
NASA's Goddard Space Flight Center

The trend map of East Asia shows the change in NO2 levels from 2005 to 2016.

Data Colorbar

Regional Data

Select from the cities below to find data and plots specific to each location. To sort, simply click on one of the column headings.

Region: East Asia
City Country Region 2016 Avg. NO2 Change (%) Uncertainty (±%)
Chongqing China East Asia 7.12 25.65 18.64
Shanghai China East Asia 18.97 -33.69 11.59
Beijing China East Asia 17.34 -28.67 11.07
Guangzhou China East Asia 17.69 -51.52 15.26
Shenzhen China East Asia 14.54 -51.70 9.24
Tianjin China East Asia 14.06 -6.21 13.61
Dongguan China East Asia 15.96 -57.16 10.72
Chengdu China East Asia 7.81 15.06 16.64
Nanjing China East Asia 13.47 -13.31 14.40
Hong Kong China East Asia 11.92 -39.43 10.63
Wuhan China East Asia 10.01 14.12 18.92
Xian China East Asia 10.85 2.84 16.64
Hangzhou China East Asia 12.69 -24.78 18.48
Quanzhou China East Asia 3.47 23.71 16.65
Shenyang China East Asia 8.45 4.22 15.40
Harbin China East Asia 5.74 -0.82 26.86
Zhengzhou China East Asia 14.15 -12.43 15.33
Qingdao China East Asia 9.06 -7.70 17.61
Suzhou China East Asia 14.87 -6.91 13.89
Dalian China East Asia 6.65 5.30 16.60
Fuzhou China East Asia 4.21 0.49 10.29
Taipei China East Asia 6.20 -33.03 10.87
Tokyo Japan East Asia 17.40 -47.09 7.44
Osaka Japan East Asia 10.24 -45.15 9.41
Nagoya Japan East Asia 10.60 -48.56 8.47
Fukuoka Japan East Asia 4.81 -31.48 9.83
Nagasaki Japan East Asia 2.34 2.01 12.19
Busan South Korea East Asia 6.90 -5.66 9.70
Seoul South Korea East Asia 16.06 -24.13 11.17