부산대학교 도서관

While compared with the previous studies that emphasized on the decrease of air pollution concentration in the urban area during holidays (i.e. positive 'holiday effect'), the current research aims to determine which locations experience increased levels of air pollution duringholidays (i.e. negative 'holiday effect'). Air pollutant concentrations (CO, PM_(10), NO_2, and SO_2) from the Taiwan EPA air quality monitoring database were collected and analyzed in this study. Finally, the hourly data from seventy-one monitoring stations were analyzed between 2005 to 2014. According to the results, the negative 'holiday effect' eventuated in different places and has specific spatial characteristics. Based on the spatial and temporal distribution of data regarding holiday effect indicators in Taiwan, a positive 'holiday effect' was observed in Norhtern Taiwan, consisting of CO and PM_(10), while a negative 'holiday effect' was observed in Southern Taiwan. In addition, although both Northern and Southern Taiwan have positive 'holiday effect' in terms of NO_2, the positive 'holiday effect' of NO_2 in Southern Taiwan was weaker than that in Northern Taiwan. These results indicate that the Southbound holiday migration during long vacations may deteriorate air quality in Southern Taiwan, in contrast to the popular concept of 'going South to get fresher air'. However, in terms of SO_2 emissions and cold seasons, the spatial difference between Northern and Southern Taiwan, in terms of the 'holiday effect', was not significant. As SO_2 emissions are mainly associated with industrial activity, it may be an inadequate indicator for assessing the 'holiday effect'. Furthermore, as the air diffusion conditions deteriorate during cold seasons, the 'holiday effect' is less likely to be observed. In summary, the indicators of CO and PM_(10) can be used to explain the negative holiday effect and show the spatial difference between Northern and Southern Taiwan. Moreover, the air pollutants resulted from the vehicles that people use during their vacations may increase and will affect the local air quality in the southern areas of Taiwan.