Potential impacts of electric vehicles on air quality in Taiwan.
The prospective impacts of electric vehicle (EV) penetration on the air quality in Taiwan were evaluated using an air quality model with the assumption of an ambitious replacement of current light-duty vehicles under different power generation scenarios. With full EV penetration (i.e., the replacement of all light-duty vehicles), CO, VOCs, NOx and PM2.5 emissions in Taiwan from a fleet of 20.6 million vehicles would be reduced by 1500, 165, 33.9 and 7.2Ggyr(-1), respectively, while electric sector NOx and SO2 emissions would be increased by up to 20.3 and 12.9Ggyr(-1), respectively, if the electricity to power EVs were provided by thermal power plants. The net impacts of these emission changes would be to reduce the annual mean surface concentrations of CO, VOCs, NOx and PM2.5 by about 260, 11.3, 3.3ppb and 2.1μgm(-3), respectively, but to increase SO2 by 0.1ppb. Larger reductions tend to occur at time and place of higher ambient concentrations and during high pollution events. Greater benefits would clearly be attained if clean energy sources were fully encouraged. EV penetration would also reduce the mean peak-time surface O3 concentrations by up to 7ppb across Taiwan with the exception of the center of metropolitan Taipei where the concentration increased by <2ppb. Furthermore, full EV penetration would reduce annual days of O3 pollution episodes by ~40% and PM2.5 pollution episodes by 6-10%. Our findings offer important insights into the air quality impacts of EV and can provide useful information for potential mitigation actions.
Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan.
Nan
N
Li
Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan. Electronic address: jpchen@as.ntu.edu.tw.
Jen-Ping
JP
Chen
Research Center of Environmental Changes, Academia Sinica, Taipei, Taiwan.
I-Chun
IC
Tsai
Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan.
Qingyang
Q
He
Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan.
Szu-Yu
SY
Chi
Taiwan Typhoon and Flood Research Institute, Taipei, Taiwan.
Yi-Chiu
YC
Lin
Department of Atmospheric and Oceanic Sciences and Laboratory for Climate and Ocean-Atmosphere Studies, Peking University, Beijing, China.
Tzung-May
TM
Fu
D000393:Air Pollutants / Q000032:analysis*; D000397:Air Pollution / Q000032:analysis*; D011211:Electric Power Supplies; D004560:Electricity; D004784:Environmental Monitoring; D018986:Motor Vehicles / Q000145:classification*; D013624:Taiwan; D001335:Vehicle Emissions / Q000032:analysis*
D000393:Air Pollutants; D001335:Vehicle Emissions
AQI; Air quality; CMAQ; Electric vehicle; Taiwan