Monthly atmospheric CO₂ record from Ocean Station C, 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

1968-1973

Ocean Station C, U.S.A.
Open ocean
54°00; N, 35°00' W
6 m above MSL

Trends

The ocean sampling site on Ocean Station "Charlie", in the North Atlantic, was operated in cooperation with NOAA's National Weather Service from November 1968 to May 1973. The annual atmospheric CO₂ mixing ratio at Ocean Station "C" rose from 324.03 parts per million (ppm) in 1969 to 327.54 ppm in 1972.

Atmospheric CO₂ mixing ratios from this North Atlantic site show a seasonal pattern: the annual minimum typically occurs in August; the annual maximum, in April-May.

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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