Zitat von Abstract: Germany's national meteorological service (Deutscher Wetterdienst, DWD) operates a network of so-called "climate reference stations". ... Currently, one specific task is the performance of parallel measurements in order to allow the comparison of manual and automatic observations. These parallel measurements will be continued at a subset of these stations until at least 2018. Later, all stations will be operated as automatic stations but will also be used for the comparison of subsequent sensor technologies. ... The analysis shows that the automation of stations did not cause an artificial increase in the series of daily mean temperature.