Stations
1
1
|
 |
 |
 |
|
Mace
Head (Ireland) |
Trinidad Head (California) |
Ragged Point (Barbados) |
|
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 |
|
|
Cape Matatula |
Cape Grim (Tasmania) |
|
|
(American Samoa) |
The
ALE/GAGE/AGAGE stations are coastal or mountain sites around the world chosen
primarily to provide accurate measurements of trace gases whose lifetimes are
long compared to global atmospheric circulation times. The AGAGE and affiliated
stations are listed in the following table. For more information of each
individual station please click station name (e.g. Mace Head) in the following table.
ALE/GAGE/AGAGE Stations
| (1) Ireland |
Adrigole |
520 N, 100 W |
1978-1983 |
|
Mace Head |
530 N, 100 W |
1987-present |
| (2) USA |
Cape Meares, Oregon |
450 N, 1240 W |
1979-1989 |
|
Trinidad Head, California |
410 N, 1240 W |
1995-present |
| (3) Barbados |
Ragged Point |
130 N, 590 W |
1978-present |
| (4) American Samoa |
Cape Matatula |
140 S, 1710 W |
1978-present |
| (5) Australia |
Cape Grim, Tasmania |
410 S, 1450 E |
1978-present |
Affiliated Stations
footnotes: 1, stations share common calibrations and instrumentation with AGAGE stations;
2, stations use AGAGE-compatible (but not identical) instruments
The AGAGE station locations were originally chosen to
determine concentrations of trace gases in clean air in the lower troposphere in
the four equal-mass subdivisions of the global atmosphere. The majority of the
anthropogenic halocarbons are in the Northern Hemisphere mid-latitudes, so two
stations are placed in this semi-hemisphere. The two tropical stations are
located below the tropical Hadley cell while the three mid-latitude stations are
centered below the weak indirect cells. The tropical stations experience steady,
largely easterly winds, whereas the mid-latitude stations experience generally
westerly winds disrupted routinely by the passage of cyclones and anticyclones.
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