Seasonal and interannual variations in atmospheric oxygen and implications for the global carbon cycle

@article{Keeling1992SeasonalAI,
  title={Seasonal and interannual variations in atmospheric oxygen and implications for the global carbon cycle},
  author={Ralph F. Keeling and Steve Shertz},
  journal={Nature},
  year={1992},
  volume={358},
  pages={723-727}
}
Measurements of changes in atmospheric molecular oxygen using a new interferometric technique show that the O2 content of air varies seasonally in both the Northern and Southern Hemispheres and is decreasing from year to year. The seasonal variations provide a new basis for estimating global rates of biological organic carbon production in the ocean, and the interannual decrease constrains estimates of the rate of anthropogenic CO2 uptake by the oceans. 

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