Ratios of NO2 concentrations measured during driving and active commutes

NO2 concentrations were measured during driving, walking and cycling commutes using Earthsense zephyrs. Four routes were taken. <br> Measruements were averaged by trip and ratios of NO₂ in car to active commute (i.e NO₂ car/ NO₂ walking or NO₂ car/ NO₂ cycle) were calculated for each trip and route.

本研究采用Earthsense Zephyrs设备，对驾车、步行与骑行通勤过程中的二氧化氮（NO₂）浓度进行了实地测量，共选取四条通勤路线开展实验。
针对每一次行程与每一条路线，先对采集得到的浓度数据按行程进行平均处理，随后计算机动车通勤时段二氧化氮浓度与主动式通勤（即步行或骑行）时段二氧化氮浓度的比值（即NO₂_机动车 / NO₂_步行 或 NO₂_机动车 / NO₂_骑行）。