Ratios of O3 concentrations measured during driving and active commutes

O3 concentrations were measured during driving, walking and cycling commutes using Earthsense zephyrs. Four routes were taken. Measruements were averaged by trip and ratios of O3 in car to active commute (i.e O3 car/ O3 walking or O3 car/ O3 cycle) were calculated for each trip and route.

本研究采用Earthsense Zephyrs传感器，在驾车、步行与骑行通勤过程中开展臭氧（O3）浓度监测。本次实验共选取4条通勤路线，对每一次行程的监测数据取平均值后，针对每条路线及每一次行程，分别计算了机动车内臭氧浓度与步行通勤时段臭氧浓度、机动车内臭氧浓度与骑行通勤时段臭氧浓度的比值（即O3_机动车 / O3_步行 或 O3_机动车 / O3_骑行）。