Abstract Cities often have a problem regarding the air quality because various emissions are produced within these cities and local emission sources among others relate directly to the air quality. As an addition to stationary monitoring stations, mobile measurements can provide valuable information regarding spatial distribution of pollutants. In this research, a case study is presented to illustrate the design and implementation of mobile measurement platform with a bicycle. Different compact measuring devices were selected and installed on the bicycle for mobile measurements along a designated route in Stuttgart, Germany. The measured pollutants included Particulate Matter (PM), Ultrafine Particles (UFP), Black Carbon (BC), nitrogen oxides (NO, NO2 and NOX) and ozone (O3). Meteorological parameters such as air temperature, relative humidity, wind speed, wind direction, solar radiation and air pressure were also measured. These measured parameters were allocated to the location using a GPS device. The measurements were carried out during February 2018. The measurement route covered part of the city center with high traffic roads as well as side roads and a park. The results show a very high spatial variability and the pollutant concentration was influenced by different factors such as local traffic, measurement location, meteorological conditions, etc. For NO, NO2 and UFP, the concentrations in the park (which can be considered as urban background level) were only around 30%–50% of the measured concentrations directly on the roadside. For PM10, the differences between the concentrations on the road and in urban background were less pronounced but still clearly measurable. The mobile measurement platform with the bicycle provided an opportunity to have a spatial distribution of a larger study area and proved to be highly adaptive and flexible method.

中文翻译：

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使用自行车进行移动空气质量测量以获得斯图加特市中心及其周边地区的空间分布和高时间分辨率

摘要 城市经常存在空气质量问题，因为城市内部产生各种排放物，而当地排放源等与空气质量直接相关。作为对固定监测站的补充，移动测量可以提供有关污染物空间分布的宝贵信息。在这项研究中，通过一个案例研究来说明带有自行车的移动测量平台的设计和实现。选择了不同的紧凑型测量设备并安装在自行车上，以便沿着德国斯图加特的指定路线进行移动测量。测量的污染物包括颗粒物 (PM)、超细颗粒物 (UFP)、黑碳 (BC)、氮氧化物 (NO、NO2 和 NOX) 和臭氧 (O3)。气象参数，如气温、相对湿度、还测量了风速、风向、太阳辐射和气压。这些测量参数被分配到使用 GPS 设备的位置。测量是在 2018 年 2 月进行的。测量路线覆盖了市中心部分交通繁忙的道路以及支路和公园。结果表明，空间变异性非常高，污染物浓度受当地交通、测量位置、气象条件等不同因素的影响。对于 NO、NO2 和 UFP，公园内的浓度（可以认为是城市背景）水平）仅为路边直接测量浓度的 30%–50% 左右。对于 PM10，道路和​​城市背景中的浓度差异不那么明显，但仍然可以清楚地测量。