Back to Search
Start Over
Effectiveness of SOx, NOx, and Primary Particulate Matter Control Strategies in the Improvement of Ambient PM Concentration in Taiwan.
- Source :
- Atmosphere; Apr2021, Vol. 12 Issue 4, p460, 1p
- Publication Year :
- 2021
-
Abstract
- The Community Multiscale Air Quality (CMAQ) measurement was employed for evaluating the effectiveness of fine particulate matter control strategies in Taiwan. There are three scenarios as follows: (I) the 2014 baseline year emission, (II) 2020 emissions reduced via the Clean Air Act (CAA), and (III) other emissions reduced stringently via the Clean Air Act. Based on the Taiwan Emission Data System (TEDs) 8.1, established in 2014, the emission of particulate matter 2.5 (PM<subscript>2.5</subscript>) was 73.5 thousand tons y<superscript>−1</superscript>, that of SOx was 121.3 thousand tons y<superscript>−1</superscript>, and that of NOx was 404.4 thousand tons y<superscript>−1</superscript> in Taiwan. The CMAQ model simulation indicated that the PM<subscript>2.5</subscript> concentration was 21.9 μg m<superscript>−3</superscript>. This could be underestimated by 24% in comparison with data from the ambient air quality monitoring stations of the Taiwan Environmental Protection Administration (TEPA). The results of the simulation of the PM<subscript>2.5</subscript> concentration showed high PM<subscript>2.5</subscript> concentrations in central and southwestern Taiwan, especially in Taichung and Kaohsiung. Compared to scenario I, the average annual concentrations of PM<subscript>2.5</subscript> for scenario II and scenario III showed reductions of 20.1% and 28.8%, respectively. From the results derived from the simulation, it can be seen that control of NOx emissions may improve daily airborne PM<subscript>2.5</subscript> concentrations in Taiwan significantly and control of directly emitted PM<subscript>2.5</subscript> emissions may improve airborne PM<subscript>2.5</subscript> concentrations each month. Nevertheless, the results reveal that the preliminary control plan could not achievethe air quality standard. Therefore, the efficacy and effectiveness of the control measures must be considered to better reduce emissions in the future. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20734433
- Volume :
- 12
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Atmosphere
- Publication Type :
- Academic Journal
- Accession number :
- 150812569
- Full Text :
- https://doi.org/10.3390/atmos12040460