The objectives are: 1. to monitor in near-real time the levels of a whole suite of halocarbons (both biogenic and anthropogenic) ranging through CFCs, HCFCs, and HFCs using an adsorption/desorption system coupled to a GC/MS system not using liquid cryogens. 2.The system will be installed (April 2000) at the Ny-Alesund, Zeppelin Research Station and will be operated and owned by NILU (Dr. N.SChmidbauer). 3. Comparisons will be made with the data obtained (since Oct. 1994) on similar compounds from the Mace Head (Ireland) station which uses similar instrumentation, and the Jungfraujoch Station (Jan 2000) operated by EMPA (Dr. Stefan Reimann). 4. Data will be compared to the Southern Hemisphere data collected at Cape Grimm, Tasmania by CSIRO (Dr. P. Fraser) 5. Data will be used to model the dispersion of the halocarbons in the high latitudes and possible consequences for radiative forcing.
The halocarbons include both short lived eg Trichloroethylene and long lived e.g. CFCs such as F-11. Later snow and ice-pack measurements may be made when equipment is operating properly.
Not really possible to store such air samples in any quantity for a long time.
Air samples are drawn in the instruments and analysed in a continuous near-real time manner using a field installed adsorption/desorption (not using liquid cryogens) system coupled to a GC/MS operating in multi-ion monitoring mode. 1. Ny-Alesund, Svalbard (NILU), 2. Mace Head, Ireland (UNiv. Bristol), 3. Jungfraujoch (EMPA)
Linked to the absolute scale validated by Scripps Oceanographic Institute (Prof. R. Weiss), specially prepared standards will be distributed between the three stations as well as Scripps and other labs. for assessment of instrument performance, assessment and validation.
NILU, EMPA, AGAGE-MS