Monthly atmospheric CO2 record from Amsterdam Island, France

Graphics Digital Data

Pieter P. Tans and Thomas J. Conway

NOAA Climate Monitoring and Diagnostics Laboratory, Boulder, Colorado 80305, U.S.A.

Period of Record


Amsterdam Island, Indian Ocean
Island seashore
37°95' S, 77°53' E
150 m above MSL


The sampling site on Amsterdam Island is operated in cooperation with the French Centre des Faibles Radioactivities. Except during the summer (December-February), when this island is within the wind regime of the westerlies, the monthly mean mixing ratios from Amsterdam Island can be considered representative of the background subantarctic atmosphere (Gaudry et al. 1983).

The NOAA flask data from Amsterdam Island show an increase in the annual value from 341.12 parts per million (ppm) in 1983 to 350.59 ppm in 1989.

CITE AS: Tans, Pieter P. and T.J. Conway, 2005. Monthly Atmospheric CO2 Mixing Ratios from the NOAA CMDL Carbon Cycle Cooperative Global Air Sampling Network, 1968-2002. In Trends: A Compendium of Data on Global Change. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tenn., U.S.A.

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