<p> Air pollution in Beijing is becoming hard to ignore, however, there are no long-term studies examining the particle pollution such as PM 2.5 concentration. This study describes current and predicts future PM 2.5 pollution for a three-year period, 1<sup>st</sup> January 2010 to 31<sup>st</sup> December 2012, from the U.S. Embassy monitoring site in Chaoyang, Beijing. We calculated the 24-hour and annual PM2.5 concentrations under EPA method and using the Box-Jenkins method to build a SARIMA model (Seasonal Autoregressive Integrated Moving Average). The results showed the PM2.5 concentration decreased from 2010 to 2012. The 24-hour PM2.5 concentration was 294&mgr;g/m<sup>3</sup>, ranged from 265.2&mgr;g/m<sup>3</sup> to 318.5&mgr;g/m<sup>3</sup>. And the annual PM2.5 concentration was 94.5&mgr;g/m<sup>3</sup> which yearly range from 89.5&mgr;g/m<sup>3</sup> to 99.0&mgr;g/m<sup>3</sup> and the quarterly value from 73.1&mgr;g/m<sup>3</sup> to 108.6&mgr;g/m<sup> 3</sup>. The 24-hours and annual concentration is about 7 to 8 times higher than the US National Ambient Air Quality Standard (NAAQS). There is an urgent need for long-term studies to guide policy makers to improve the air quality in Beijing.</p>
| Identifer | oai:union.ndltd.org:PROQUEST/oai:pqdtoai.proquest.com:1545716 |
| Date | 19 November 2013 |
| Creators | Peng, Yang |
| Publisher | University of Nevada, Reno |
| Source Sets | ProQuest.com |
| Language | English |
| Detected Language | English |
| Type | thesis |
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