Sponsored by NASA's Atmospheric Composition Focus Area in Earth Science

AGAGE Stations

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Affiliated Stations

The Samoa Observatory is located on the northeastern tip of Tutuila island, American Samoa, on a ridge overlooking the South Pacific Ocean. The observatory was established in 1974 on a 26.7 acre site as one of the NOAA/ESRL GMD Baseline Observatories. The ALE/GAGE/AGAGE started measuring atmospheric CFC-11, CFC-12, CH₃CCl₃, CCl₄, N₂O in 1978, CFC-113 and CH₄ in late 1985/early 1986, and CHCl₃ in 1996 by using GC-multidetector (GC-MD) system. A new Medusa GC-MS instrument was installed in May 2006. Both instruments are housed in the NOAA "Hudson" laboratory building adjacent to a 24-meter sampling and cellular telephone tower on the crest of edge. This station is especially important because it is the only in situ field measurement site where both the AGAGE and GMD networks overlap.

Station Information (Cape Matatula, American Samoa)

AGAGE project official: Ron Prinn, curator: Ray H.J. Wang

 Last update: November 2008