Monthly atmospheric CO2 record from Mace Head, County Galway, Ireland

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


Mace Head, County Galway, Ireland
Island promontory
53°33' N, 9°90' W
25 m above MSL


The sampling site at Mace Head is operated in cooperation with the University College Galway. The first NOAA/CMDL flask air samples from Mace Head were collected in late 1991. The NOAA/CMDL flask data from Mace Head show an increase in the annual mixing ratio from 356.20 parts per million (ppm) in 1992 to 373.60 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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