Sky Color of 10 Chinese Cities

Sky Color of Beijing 2000-2011

Well, not real colors of the sky – but you get the idea.

The dominant influence factor is the climate. Winter is the most polluted season because of thermal inversion and less rainfall. Spring in northern China suffers from sandstorm. Still, you can easily identify the effect of government intervention, such as the significant improvement in Taiyuan. And look how amazingly Beijing performed in 2008 August through September for the Olympics. Click the image below to zoom in.

Sky Color of Beijing 2000-2011 (small)

Tools used: R

Dedicated to my endearing home city.

Looking at the Forbidden City from Jingshan
[Looking into the Forbidden City from Jingshan – BJNews, March 21, 2011]

Update: Images now available as Flickr photostream