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Sean mentioned in his blog about how pooling together of efforts by Andrew, Sean, Bill et. al, the Fortifacture/MapuCommons folks were able to bring to you in record time the near-real time pollution data from Beijing. As we were working on this, we realized that there is a huge difference in the perceptions between the host nation and most of the western world/media on what constitutes severe air quality problem. For eg. see below the two pics, both dated 5th August, 2008. One shows Beijing “Clear skies” while the other has haze/smog blanketing Beijing. Wonder whether they are talking about different places and different days!
Xinhua Photo

The photo taken on Aug. 5, 2008 shows the clear sky above the National Stadium, namely the Bird’s Nest, in Beijing, capital of China. (Xinhua Photo/Li Ziheng)

BBC Photo

5 August PM10 reading: 104 micrograms per cubic metre. The World Health Organisation guideline maximum is 50 micrograms per cubic metre, averaged over 24 hours.

Knowing that many countries in Asia, including India and China share the dubious distinction of having the most polluted cities in the world, the media’s obsession with hazy skies should come as no surprise and that much of the media coverage of Beijing Olympics has been about the quality of air. See for example, this split picture of Beijing skyline on a clear and a hazy day on the BBC’sBeijing Pollution: Facts and Figures.

BBC has, for last several weeks, a daily pic of Beijing skyline with a running commentary on the hazy conditions, on their Beijing Pollution Watch site. So we at FortiusOne/Mapufacture decided to generate a daily map of the official stats on PM10 published by Beijing Municipal Environmental Protection Bureau (BMEPB) and compare it with BBC’s Beijing Pollution Watch. PM10, the airborne particles consisting of dust from construction,landfill sites, vehicle exhaust, industrial sources etc. of size 10 microns or less, are the main culprit behind the hazy skies /bad air days in Beijing.

The map below is based on the air quality monitors spread across dozens of Beijing districts along with the locationsof Olympic events (red circles). The six slices of each pie-chart show share of PM10 at each location between 5th and 10th Aug, 2008.

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The second map shows today’s readings of PM10 (purple colored proportional circles) for each of the air quality monitoring stations, along with a pie-chart that has share of the SO2, PM10 and NO2.

For comparison, see BBC’s pic of the same day below.

BBC: 10 August PM10 reading: 278 micrograms per cubic metre. We test for 10 minutes at midday from a seventh floor balcony in central Beijing..

While the official readings in nearly half dozen air quality monitoring stations nearby have readings near 90, it has apparently, not had an adverse effect on the athletes thus far in the games. As BBC offers daily pics of the smog, we will have daily updates on the air quality all through the Olympics. In the mean while you may explore on the Finder! the air quality data (SO2, NO2 and PM10) for the last six days i.e, 5th to 10th August, 2008, the road network, and the “>district polys as well as Olympic Athletic Venues,and Olympic village. Search using keyword “Olympics.” You are welcome to download, add, update and upload these data back to Finder!

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