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The relationship between typhoons' peripheral circulation and ground-level ozone concentrations in central Taiwan |
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| Authors: | Wan-Li Cheng Li-Wei Lai Walter Den Meng-Ting Wu Chao-An Hsueh Pay-Liam Lin Chueh-Ling Pai Yeou-Lih Yan |
| Institution: | 1. Taiwan Development Institute, Taichung, 407, Taiwan, Republic of China 2. Centre for General Education, National Taipei College of Business, Taipei, 100, Taiwan, Republic of China 3. Tunghai University, Taichung, 407, Taiwan, Republic of China 4. National Central University, Jhongli, 320, Taiwan, Republic of China 5. Green Taiwan Technology Corporation, Taichung, 406, Taiwan, Republic of China 6. National United University, Miaoli, 360, Taiwan, Republic of China |
| Abstract: | Surface data of meteorological parameters (wind speed, wind direction, and mixing height) and air pollutant concentrations (O3, NO, and NO2) were collected for a 92-day period associated with typhoon formation in 2005. The influence of typhoons on O3 concentration were defined by azimuth and distance from Taiwan, and Types A, B, and C correspond to typhoons less than 1,500 km from Taiwan and located between azimuths 45° and 135°, 135° and 225°, and 225° and 45°, respectively. Type D corresponds to typhoons more than 1,500 km from Taiwan. Titration reactions were conducted at three temporal phases: 2000–0700, 0800–1100, and 1200–1400 LST (Local Standard Time). The air pollution model (TAPM) was used to simulate wind fields and trajectories of air masses. It was determined that typhoon position affected O3 concentration, temporal and spatial patterns of O3 titration and vertical meteorological characteristics, which were not all at the statistically significant level. |
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