Monthly atmospheric CO2 record from Guam, Mariana Islands

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


Guam, Mariana Islands
U.S. Territory
Pacific Ocean island seashore
13°43' N, 144°78' E
6 m above MSL


The NOAA/CMDL sampling site at Guam, in the Mariana Islands, is operated in cooperation with the University of Guam/Marine Laboratory. The NOAA/CMDL flask data from Guam show an increase in the annual mixing ratio from 340.05 parts per million (ppm) in 1980 to 373.26 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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