Monthly atmospheric CO2 record from Mould Bay, Nunavut, Canada

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


Mould Bay, Nunavut, Canada
76°25' N, 119°35' W
58 m above MSL


The sampling site at Mould Bay is operated in cooperation with the Atmospheric Environment Service of Environment Canada. The NOAA/CMDL flask data from Mould Bay show an increase in the annual value from 341.85 parts per million (ppm) in 1981 to 363.66 ppm in 1996. A notable feature of the Mould Bay record is the slight decline in the annual atmospheric CO2 mixing ratio from 1991 to 1992.

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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