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Halogenated Greenhouse Gases by a Swiss MEDUSA

English title Halogenated Greenhouse Gases by a Swiss MEDUSA
Applicant Reimann Stefan
Number 128725
Funding scheme R'EQUIP
Research institution Luftfremdstoffe / Umwelttechnik 500 - Mobility, Energy and Environment EMPA
Institution of higher education Swiss Federal Laboratories for Materials Science and Technology - EMPA
Main discipline Climatology. Atmospherical Chemistry, Aeronomy
Start/End 01.12.2009 - 30.11.2010
Approved amount 60'000.00
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Keywords (10)

halogenated greenhouse gases; ozone depletion; Kyoto Protocol; Montreal Protocol; atmospheric trace gases; non-CO2 greenhouse gases; gas chromatography-mass spectrometry; trace gas measurements; greenhouse effect; ozone decline

Lay Summary (English)

Lead
Lay summary
The aim of CH-HALOMED is to install a measurement equipment to analyse halogenated greenhouse gases in the laboratory of Empa in addition to the continuously running identical system at Jungfraujoch (MEDUSA). This measurement equipment has been developeed by SIO in La Jolla (California) and is the main instrumentation used world-wide to perform state-of-the art measurements of halogenated greenhouse gases.The scientific goals of CH_HALOMED are to developing analytical methods for new halocarbons used in the industry and in consumer products and advance the sample trapping technology within the MEDUSA.Furthermore, the new system will allow sustaining the intercomparability within the European network: System for Observation of Halogenated Greenhouse Gases in Europe (SOGE) and its extension to China (SOGE-A) and linking of standards and scales at Jungfraujoch to those of AGAGE/NOAA. The instrumentation of CH-HALOMED will be used to analyse atmospheric halocarbons from international projects such as CARIBIC (air sampled by commercial aircrafts) and Antarctic samples by KOPRI (Korea Polar Research Institute) and NILU (Norwegian Institute for Air Research).Finally the MEDUSA system will be used for quantification of Swiss emissions of halogenated greenhouse gases by analysing air samples from the suburban station of Duebendorf (near Zurich).The context of CH-HALOMED is the global effort to assess the contribution of halogenated greenhouse gases to global warming. This is achieved by estimating global emissions of halogenated greenhouse gases (i.e. CFCs, HFCs, SF6) uisng their behaviour in the background air masses and to assess regional sources, using pollution events occuring at measurement sites in different continents.Furthermore, the MEDUSA system is extremely well-suited for detection of newly released industrial compounds in the atmosphere. The applicability of this concept has already been shown by Empa using existing equipments. With the new MEDUSA Empa has the possibility to advance in this field to faster reacting hydrofluorcarbons, which will be produced by industry in the next years. Although these compounds do have a minor influence on the global warming, their degradation products (i.e. fluorinated organic acids) could potentially affect aquatic bio-organisms.
Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants

Associated projects

Number Title Start Funding scheme
117753 Assessment of European emissions of non-CO2 greenhouse gases by a combination of continuous measurements, transport models and RN-222 emission maps 01.06.2008 Project funding (Div. I-III)
137638 Measurement-based verification of regional emissions of halogenated greenhouse gases 01.04.2012 Project funding (Div. I-III)

Abstract

Measurements of atmospheric halocarbons have led to the detection of the stratospheric ozone depletion by chloro- and bromofluorocarbons. At present their substitutes (hydrofluorocarbons) and long-lived fully fluorinated molecules (e.g. CF4 and SF6) present an increasing threat to the environment, because of their growing contribution to global warming. To measure these new hazards a ground-breaking equipment (MEDUSA) has been developed by SIO (La Jolla, California, US) within the framework of the world-wide AGAGE (Advanced Global Atmospheric Gases Experiment) network. The MEDUSA is an integral pack-age consisting of a commercially available gas chromatograph-mass spectrometer (GCMS) and a preconcentration unit, which has to be assembled from various sub-units.Empa has assembled this novel equipment in cooperation with AGAGE and since 2008 a MEDUSA is operating at the high-Alpine site of Jungfraujoch for assessing both rising background concentrations and European sources of halogenated greenhouse gases. The aim of CH-HALOMED is to install a second MEDUSA in the laboratory of Empa, with the following scientific goals:- Developing analytical methods for new halocarbons used in the industry and in consumer products.- Advancing the sample trapping technology within the MEDUSA.- Sustaining the intercomparability within the European network: System for Observation of Halogenated Greenhouse Gases in Europe (SOGE) and its extension to China (SOGE-A), with a site north of Beijing.- Link of standards and scales at Jungfraujoch to the international cooperations of AGAGE/NOAA- Analysis of atmospheric halocarbons from international projects such as CARIBIC (air sampled by commercial aircrafts) and Antarctic samples by KOPRI (Korea Polar Research Institute).- Quantification of Swiss emissions of halogenated greenhouse gases by analysing air samples from the suburban station of Duebendorf (near Zurich).In essence, the new MEDUSA will allow Empa to keep its international top position in the field of the analysis of atmospheric halocarbons and to contribute substantially to the scientific developments on a global basis. For the atmospheric halocarbons this could be of paramount importance for the Post-Kyoto period, as both the independent verification of emissions and the detection of hitherto unknown species is an issue for future international treaties.
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