Picture of the Month

Audits are a central element of quality assurance in the European measurement network ACTRIS (https://www.actris.eu). Scientists from Forschungszentrum Jülich, together with their colleagues from EMPA, examined the VOC and NOx data and the respective measurement devices on the Jungfraujoch. The calibration standards that had been brought along were measured on site together with both the devices from Jülich and Jungfraujoch in order to harmonise the network’s datasets. Pictures: HFSJG