| Summary: | 碩士 === 國立雲林科技大學 === 環境與安全衛生工程系 === 107 === In recent years, the Asian region’s development has also increased the pollution emission. Ozone is also one of other important pollutant. According to the Taiwan EAP, the problem of ozone hour in Taiwan has gradually improved, but ozone 8-hour pollution is still exist. In addition to its own emissions, Taiwan is also affected by the long range transport (LRT), it means that Taiwan want to control the ozone pollution, must know the emission control direction and the impact of the LRT on Taiwan.
This study used CMAQ-BFM to conduct the regional source simulations to understand the regional sources of daily maximum ozone (DMO3) and maximum daily 8 hour ozone (MDA8O3) in Taiwan in 2013 (for 4 months), In addition, we simulated 25 kinds of ozone precursor reduction cases and combine the cumulated with frequency method and site day’s ratio method to find out the direction of ozone and ozone 8-hour reduction.
The result show the regional source of DMO3 in Taiwan in 2013, the East Asia background is the largest source, the site average concentration is 30.5 ppb, with total impact of 49%, followed by the LRT impact (18.6 ppb, with total impact of 30%). The Taiwan local impact is the lowest impact (12.6 ppb, with total impact of 21%). The regional source of MDA8O3 in Taiwan in 2013, the East Asia background is the largest source, the site average concentration is 30.6 ppb,with total impact of 56%, followed by the LRT impact (17.1 ppb, with total impact of 31% ).the Taiwan local impact is the lowest impact(7.0 ppb, with total impact of 13% ). There is on significant difference in the regional sources of DMO3 and MAD8O3, the main difference is the East Asia background and Taiwan local impact, the proportion of MDA8O3 in background is obviously larger, and the local impact in Taiwan is smaller.
The emission reduction simulation results show that frequency method estimate the direction of ozone pollution reduction in Taiwan can’t be used in all area. The whole year (for 4 months) ozone in Northern, Chumiao, Central and Kaopin air basin are VOC control, Yunchainan air basin is NOx control, while the direction of ozone 8-hour pollution control, only the Northern and Kaopin are different from the ozone hourly control direction. Northern air basin can’t achieve the effect of pollution control with emission reduction, and Kaoping’s control direction of ozone 8-hour turns to NOx control. The result of site day’s ratio weren’t significant with frequency method between ozone hour and 8-hours. Only Central air basin’s ozone 8-hour change to NOx control
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