Chinese Urban Air Quality Data
for Spring 2001
PIs: Oliver
Wild (FRSGC), oliver@jamstec.go.jp
Michael Prather (UCI), mprather@uci.edu
Products: Measures
of urban air quality from China
As of July 2000, each city in China
has been required to publish an Air Pollution Index (API) measured
for the urban region each day. Typically, observations are made
of NOx, SO2 and TSP (Total suspended particulate), and in some
cases CO and O3. An air pollution index is derived for each of
these, based on a scale from 0-500 defined by the State Environmental
Protection Agency, and the highest API figure is published, and
the corresponding species identified. If all API are below 50,
then the air is considered clean and no species is identified.
Beijing and Shanghai currently release an API for each species
measured. The API are typically released in late afternoon for
the current day.
The figures for 42 cities are presented
each day by plotting circles at the appropriate location, with
radii proportional to API and coloured by the respective constituent.
On the web site, this is supplemented by meteorological data
and the concurrent midday GMS picture of the region. A
summary time-series is presented for Northern, Eastern and Southern
coastal cities which are closest to the Trace-P measurement region. Data
for Beijing and Shanghai are plotted separately after conversion
of the API to volume mixing ratio units.
Data format: ascii
data, gif images (for maps), PostScript (summary page)
Data volume: < 1
Mb/day
Mode of transfer to field: Web
site
Requirements: Colour
printer
Field time when data available: 7:00
pm JST (time to
process data: none)
Name of person in field handling data: Oliver
Wild (at Yokota)
URL: http://www.ess.uci.edu/~oliver/tracep/
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