Part A

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- C2Cl4 - Station Country/ Index Contributor Method Data Period Territory Number REGION IV (North and Centrail America) Alert Canada ALT482N20 NOAA/GMD GC-MS 1993/11 1997/12 Barrow U. S. A. BRW471N20 NOAA/GMD GC-MS 1993/12 1997/12 Niwot Ridge U. S. A. NWR440N20 NOAA/GMD GC-MS 1993/12 1997/12 REGION V (South-West Pacific) Cape Grim Australia CGO540S20 NOAA/GMD GC-MS 1993/11 1997/12 Cape Kumukahi U. S. A. KUM519N20 NOAA/GMD GC-MS 1995/11 1997/12 Mauna Loa U. S. A. MLO519N20 NOAA/GMD GC-MS 1993/11 1997/12 Tutuila U. S. A. SMO514S20 NOAA/GMD GC-MS 1993/12 1997/12 Antarctica South Pole U. S. A. / Antarctica SPO789S20 NOAA/GMD GC-MS 1993/2 1997/12

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