Stationary measurements are often supplemented by mobile measurements, which can be taken from an automobile, bicycle, or on foot. Vehicles for the combined measurement of climate and air (Figure 4/2a) are often employed to measure all of the usual meteorological quantities and levels of air pollution at the same time. The disadvantage of this approach is that such vehicles are restricted to drivable streets or paths and thus outlying locations cannot be reached.

The duration of measurement at a location depends, among other factors, on the response times of the individual measurement devices. In addition, the duration of measurement should not be too protracted, otherwise the measurement run can last too long and the temporal variation of the measured parameters versus the spatial parameters can become too large. A correction for uniform time is, however, necessary in all cases. Figure 4/2b shows the result of temperature measurement sequences in the area of a large city park and its surroundings in Stuttgart (KNAPP, 1998). One can recognize the lower air temperatures in the park and its immediate vicinity. A deep penetration of cool air is only visible where the relief supports a cold air flow.