Monthly atmospheric CO2 record from Mauna Loa, Hawaii, U.S.A.

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


Mauna Loa, Hawaii, U.S.A.
Barren volcanic slope
19°53' N, 155°58' W
3397 m above MSL


The NOAA/CMDL flask data from Mauna Loa show an increase in the annual value from 325.31 parts per million (ppm) in 1970 to 373.04 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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