About this Journal Submit a Manuscript Table of Contents
Advances in Meteorology
Volume 2012 (2012), Article ID 238589, 10 pages
http://dx.doi.org/10.1155/2012/238589
Research Article

A Parameterized Method for Air-Quality Diagnosis and Its Applications

1Center for Atmospheric Composition Observing & Service, Chinese Academy of Meteorological Sciences, Beijing 100081, China
2Air Quality Research Division, Science & Technology Branch, Environment Canada, 4905 Dufferin Street, Toronto, ON, Canada M3H 5T4

Received 15 June 2012; Revised 28 September 2012; Accepted 3 October 2012

Academic Editor: Zhanqing Li

Copyright © 2012 J. Z. Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A parameterized method is developed to diagnose the air quality in Beijing and other cities with an index termed (parameters linking air-quality to meteorological elements PLAM) derived from a correlation between PM10 and relevant weather elements based on the data between 2000 and 2007. Key weather factors for diagnosing the air pollution intensity are identified and included in PLAM that include atmospheric condensation of water vapour, wet potential equivalent temperature, and wind velocity. It is found that the poor air quality days with elevated PM10 are usually associated with higher PLAM values, featuring higher temperature, humidity, lower wind velocity, and higher stability compared to the averaged values in the same period. Both 24 h and 72 h forecasts provided useful services for the day of the opening ceremony of the Beijing Olympic Games and subsequent sport events. A correlation coefficient of 0.82 was achieved between the forecasts and (air pollution index API) and 0.59 between the forecasts and observed PM10, all reaching the significant level of 0.001, for the summer period. A correction factor was also introduced to enable the PLAM to diagnose the observed PM10 concentrations all year round.