We have taken a 10-year record of observations of a gas used predominantly in hand-held foam blowing canisters and assessed the state of its trends in the atmosphere.
The regulations of the Montreal Protocol on Substances that Deplete the Ozone layer and its Amendments and Adjustments has led to the phase-out of chlorofluorocarbons (CFCs) and hydrofluorochlorocarbons (HCFCs) in the rigid foam blowing sector.
This paper describes experimental methods and presents results for the adsorption of atmospherically important gases on carbon-based solid adsorbent materials used principally in our on-site ADS-GCMS instruments.
Chlorinated hydrocarbons are emitted to the atmosphere from their widespread use as solvents in diverse industrial, commercial and domestic applications.
A significant annual increase in the rate of CO2 accumulation was observed at the Mace Head (Ireland) AGAGE station during 2002-2003. While unexpected, the increase was in close agreement with a similar increase reported in Hawaii.
AGAGE measurements of pollution events at Trinidad Head (CA) have been used to infer decreases of the emissions of CFC-11, CFC-12, CFC-113 and methyl chloroform from 1996 to 2003.