The research activities of EMPA at the Jungfraujoch are conducted within the scope of the Swiss National Air Pollution Monitoring Network (NABEL) funded by the Swiss Federal Office for the Environment (FOEN), the Global Atmosphere Watch Program (GAW) of the World Meteorological Organization (WMO) and the EU project ‘System for Observation of Halogenated Greenhouse Gases in Europe (SOGE)’. The measurement programme at Jungfraujoch includes continuous in-situ analyses of ozone (O₃), carbon monoxide (CO), nitrogen monoxide (NO), nitrogen dioxide (NO₂), and the sum of nitrogen oxides (NO_y). In addition, an extended set of halocarbons and a selection of VOCs (alkanes, aromatics) are measured with a time resolution of four hours since 2000 as a part of SOGE. Daily samples are taken for determination of gaseous SO₂ and for particulate sulphur. The concentrations of total suspended particles are continuously observed as well as measured as 48-hour bulk samples. Measurements of methane, nitrous oxide and sulphur hexafluoride were commenced in February 2005 funded by the FOEN. Therefore, the whole set of non-CO₂ greenhouse gases is now continuously monitored at the Jungfraujoch.