Atmospheric Lifetime Experiment

Project Description
The Atmospheric Lifetime Experiment (ALE) began in 1978 as a global
network program to provide continuous high-frequency gas
chromatographic measurements of nitrous oxide (N2O),
Chloroflurocarbons CFCl3 (CFC-11), and CF2Cl2 (CFC-12). The network
included observation stations situated at different sites throughout
the world: Cape Grim, Tasmania; Point Matatula, American Samoa; Ragged
Point, Barbados; Cape Meares, Oregon and Adrigole, Ireland. The ALE
is but one phase of a monitoring network consisting of the Global
Atmospheric Gases Experiment (GAGE) and the Advanced GAGE. The ALE
phase ended in mid-1986.
The ALE phase (1978-1986) utilized the Hewlett Packard HP5840 gas
chromotographs; the GAGE phase utilized the HP5880 gas chromotagraphs;
and the recently initiated Advanced Global Atmospheric Gases
Experiment (AGAGE) uses a new fully automated system from Scripps
Institution of Oceanography containing a custom-designed HP5890 and
Carle Instruments gas chromotographic components.
The ALE/GAGE/AGAGE daily and monthly data are available via anonymous
FTP from the Carbon Dioxide Information Analysis Center (CDIAC) as
cd pub/ale_gage_Agage/
This subdirectory, ale, contains data from the ALE phase of the
ALE/GAGE/AGAGE experiment.
Further information can be obtained from:
Carbon Dioxide Information Analysis Center
Oak Ridge National Laboratory
Building 1000, MS-6335
Oak Ridge, TN 37831-6335
Phone: 423-574-4791
FAX: 423-574-2232