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

HALLEY BAY

Trends

The sampling site at Halley Bay, Antarctica, is operated in cooperation with the British Antarctic Survey. The NOAA/CMDL flask data from Halley Bay show an increase in the annual value from 341.4 parts per million (ppm) in 1983 to 347.5 ppm in 1987, or 1.53 ppm per year.

Like the South Pole atmospheric CO₂ mixing ratio record and other Southern Hemisphere sites, the Halley Bay record shows a small seasonal oscillation. Conway et al. (1994) reported that the average peak-to-trough amplitude for Halley Bay was only 1.5 ppm.

Halley Bay, Antarctica
Barren seashore
75°40' S, 27°00; W
3 m above MSL

Halley Bay Graph

Monthly atmospheric CO₂ mixing ratios at Halley Bay.

Halley Bay Table

CO₂ mixing ratios at Halley Bay (ppm)

Access to Digital Data

Izaña 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)