Friday, May 08, 2009

Beijing Announces Cleanest Month in 9 Years?

May 14th, 2009. Note:
Thanks to Vance for flagging the editorial mistake by China Daily. This is the "cleanest April" in 9 years.

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Blue Skies are Shining on Beijingers ! says China Daily

The city experienced 23 blue sky days in April, 2009 (a blue sky day = day with API less than 100).

Question: Why is this the cleanest month in 9 years,
August 2008, 30 days with average API of 56;
September, 2008, 29 days with average API of 56;
August 2006, 30 days with average API of 74;

and April 2009, 23 days with average API of 84?

See statistical Beijing Air Pollution Index (API) analysis @ Room with a View

Also see

2 comments:

  1. Hi Sarath,

    FYI, the China Daily misrepresented the official announcement, which stated that April 2009 was the cleanest April since 2000, not the cleanest month overall. More details here: http://live-from-beijing.blogspot.com/2009/05/april-2009-was-beijings-cleanest-april.html.

    -Vance

    ReplyDelete
  2. Dear Vance,

    thank you for clarifying the editorial mistake.

    -Sarath

    ReplyDelete