CLIMGAS-CH / AGAGE Measurements of halogenated greenhouse gases at Jungfraujoch
Halogenated greenhouse gases (CFCs, HCFCs, HFCs, PFCs, SF6) are measured continuously at the Alpine station of Jungfraujoch (3580 m asl.) in Switzerland. Together with meteorological transport models these data are used to estimate European emissions down to a regional scale.
Since January 2000 more than 50 ozone-depletion and greenhouse gases have been continuously measured at Jungfraujoch under the auspices of the Swiss national project CLIMGAS-CH. This activity is also contributing the AGAGE network and was part of the completed project SOGE. The measurement technique is GCMS (gas chromatograph – mass spectrometer).
- An assessment of regional and supra-regional emissions as well as a control of the national emission inventary.
- A definition of source locations with the help of trajectories for different spatial dimensions and establish the identity of dominant source regions.
- Montinoring the composition of the global atmosphere for Montreal Protocol and Kyoto Protocol trace gases
In 2008, the GCMS ADS at Jungfraujoch was replaced by a new pre-concentration unit and a new GCMS. This unit, called the ‘Medusa’, allows for faster (hourly measurements) and more precise measurements of a larger suite of halogenated compounds, e.g. now including the extremely long-lived tetrafluoromethane (CF4).
The Medusa system is currently set up to measure the following compounds:
- CFCs: CFC-11, CFC-12, CFC-13, CFC-113, CFC-114, CFC-115.
- HCFCs: HCFC-22, HCFC-141b, HCFC-142b, HCFC-124
- Halons H-1301, H-1211, H-2402
- CH3Cl, CH3Br, CHCl3, CH3CCl3, CCl4, TCE, PCE
- HFCs: HFC-23, HFC-32, HFC-134a, HFC-152a, HFC-125, HFC-143a, HFC-227ea, HFC-365mfc, HFC-245fa, HFC-236fa.
- PFC and other fluorinated compounds: PFC-116, PFC-218, PFC-318, SF6, CF4, (SF5CF3)
- Hydorcarbons: C2 – C6 hydrocarbons
- Carbonyl sulfide (OCS), SO2F2
- and more ….