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Advanced
Global Atmospheric Gases Experiment (AGAGE), and its
predecessors (the Atmospheric Life Experiment, ALE, and the Global
Atmospheric Gases Experiment, GAGE) have been measuring the
composition of the global atmosphere continuously since 1978. The AGAGE
is distinguished by its capability to measure over the globe at high frequency
almost all of the important gases species in the Montreal Protocol (e.g. CFCs
and HCFCs) to protect the
ozone layer and almost all of the significant non-CO2 gases in the Kyoto Protocol
(e.g. HFCs, methane, and nitrous oxide) to
mitigate climate change. |
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AGAGE is part of the powerful global observing system that is measuring
halocarbons, including bromocarbons, in the Earth's atmosphere. The ALE/GAGE/AGAGE stations
occupy coastal sites around the world chosen to provide accurate
measurements of trace gases whose lifetimes are long compared to global
atmospheric circulation times.
AGAGE also collaborates with the System
for Observation of Halogenated Greenhouse Gases in Europe (SOGE),
through transfer of AGAGE calibrations and sharing of AGAGE technology, placing
AGAGE and SOGE data on common calibration scales with comparable
precisions, accuracy and measurement frequency. AGAGE's network also
includes Hateruma Island, Japan through a co-operative agreement with the
Japanese National Institute for Environmental Studies (NIES).
The other two collaborative stations are at Shangdianzi, China and Gosan, Jeju Island,
South Korea. Shangdianzi started measuring ozone-depleting trace gases
and greenhouses gases in 2006, and is a part of SOGE-A project. The
Gosan station, started in late 2007, is operated by Seoul National
University (SNU).
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