Monthly atmospheric CO2 record from Point Barrow, Alaska, 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 Barrow, Alaska, U.S.A.
Arctic coastal seashore
71°32' N, 156°60' W
11 m above MSL


The NOAA/CMDL flask data from Point Barrow show an increase in the annual atmospheric CO2 mixing ratio from 330.27 parts per million (ppm) in 1972 to 374.35 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.

NOAA CMDL monthly CO2 records | Trends Contents | CDIAC Home