The main activities of the Group for Climate Gases are centered around the observations of anthropogenic trace gases in the atmosphere. Data is exploited for detection of sources and sinks of these gases as well as trends and their influence on atmospheric chemistry.
Trace Gas Measurements at Jungfraujoch
HALCLIM / InGOS / AGAGE: Continuous measurements of halogenated greenhouse gases at the high Alpine site of Jungfraujoch for identification of trends and regional European emissions.
CO2, CH4, N2O, SF6 and CO: Next to the halogenated greenhouse gases and ozone-depleting substances, also the important greenhouse gases carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), sulfur hexafluoride (SF6) and carbon monoxide (CO) greenhouse gases are continuously measured at Jungfraujoch.
Halogenated greenhouse gases
HALCLIM / AGAGE: Continuous measurements of halogenated greenhouse gases at the high Alpine site of Jungfraujoch for identification of trends and regional European emissions.
HIGHGAS: Development of traceable standards with long-term stability for high impact greenhouse gases.
Mehal-GG: First-time top down estimation of halocarbon emissions for Southeastern Europe and the Iberian Peninsula, based on atmospheric measurement campaigns in Finokalía (Crete, Greece) and Pic du Midi (Pyrenees, France).
Volatile organic compounds
ACTRIS-2 is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS-2 is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.
WP3: Near-surface observations of aerosols, clouds and trace gases
The overall objective of this work package is to consolidate and optimize the European capabilities to observe near-surface-based climate and air quality relevant properties of aerosol particles, cloud droplets as well as trace gases concentrations in the troposphere from ground-based stations.
• Lejeune, B., Mahieu, E., Vollmer, M. K., Reimann, S., Bernath, P. F., Boone, C. D., Walker, K. A., Servais, C.: Optimized approach to retrieve information on atmospheric carbonylsulfide (OCS) above the Jungfraujochstation and change initsabundance since 1995, J Quant Spec-trosc Radiat Transf., 186 (2017) 81-95, doi:10.1016/j.jqsrt.2016.06.001
• Mahieu, E., Lejeune, B., Bovy, B., Servais, C., Toon, G. C., Bernath, P. F., Boone, C. D., Walker, K. A., Reimann, S., Vollmer, M. K. O'Doherty, S.: Retrieval of HCFC-142b (CH3CClF2) from ground-based high-resolution infrared solar spectra: Atmospheric increase since 1989 and comparison with surface and satellite measurements, J Quant Spectrosc Radiat Transf., 186 (2017) 96-105, doi:10.1016/j.jqsrt.2016.03.01
MEDEMPA: Building of the Medusas for Norway and China.
LEMURE: The LEMURE project will advance methods to obtain reliable and independent emission numbers of non-CO2 greenhouse gases, which can be used to check emissions to be reported by the signatory countries within the Kyoto Protocol.
SOGE: To develop a new cost-effective long-term European observation system for halocarbons
ENOVO: Campaign measurements of oxidised volatile organic compounds (OVOCs) at Zürich (urban) and Jungfraujoch (high Alpine, background).
SASHA-THT: The PhD thesis “Sources and Sinks of Hydrogen in the Atmosphere during Transition to Hydrogen-based Transportation” commenced in the summer of 2007.