Atmospheric carbon dioxide records from sites in the NOAA/CMDL air sampling network

COLD BAY

Trends

The sampling site at Cold Bay, Alaska, is operated in cooperation with the National Weather Service. The NOAA/CMDL flask data from Cold Bay show an increase in the annual atmospheric CO₂ mixing ratio from 337.8 parts per million (ppm) in 1979 to 357.3 ppm in 1992, or 1.5 ppm per year. Conway et al. (1994) reported a global growth rate of 1.43 ppm per year during 1981-92 for all NOAA/CMDL flask sampling sites.

Atmospheric CO₂ mixing ratios at Cold Bay show a seasonal pattern: the annual minimum typically occurs in August; the annual maximum in April or May. Conway et al. (1994) found that the average peak-to-trough amplitude for Cold Bay was 16.5 ppm during 1981-92.

Cold Bay, Alaska, U.S.A.
Treeless peninsula
55°12' N, 162°43' W
11 m above MSL

Cold Bay Graph

Monthly atmospheric CO₂ mixing ratios at Cold Bay.

Cold Bay Table

CO₂ mixing ratios at Cold Bay (ppm)

Access to Digital Data

Guam Trends

References

Methods

CITE AS: Conway, T.J., P.P. Tans, and L.S. Waterman. 1994. Atmospheric CO₂ records from sites in the NOAA/CMDL air sampling network. In T.A. Boden, D.P. Kaiser, R.J. Sepanski, and F.W. Stoss (eds.), Trends '93: A Compendium of Data on Global Change. ORNL/CDIAC-65. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tenn., U.S.A.

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Date revised 4/10/95 (gg)