Monthly atmospheric CO2 record from Mahe Island, Seychelles

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


Mahe Island, Seychelles
4°67' S, 55°17' E
7 m above MSL


The Seychelles sampling site on Mahe Island is operated in cooperation with the Seychelles Bureau of Standards. The NOAA/CMDL flask data from the Seychelles show an increase in the annual atmospheric CO2 mixing ratio from 339.37 parts per million (ppm) in 1980 to 372.43 ppm in 2002.

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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