Monthly atmospheric CO2 record from Point Arena, California, 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


Point Arena, California, U.S.A.
38°95' N, 123°73' W
17 m above MSL


The sampling site at Point Arena, California, U.S.A. is operated in cooperation with the Point Arena Lighthouse Keepers, Inc. The NOAA/CMDL flask data from Point Arena show an increase in the annual mixing ratio from 370.89 parts per million (ppm) in 1999 to 376.94 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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