Chart recording carbon dioxide levels in air

Chart recording carbon dioxide levels in air

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Credit: CAPE GRIM B.A.P.S./SIMON FRASER/SCIENCE PHOTO LIBRARY

Caption: Air analysis. Chart record of the level of carbon dioxide, a greenhouse gas, in the atmosphere over time, as measured by a non-dispersive infrared gas analyser (not seen here). The regular, large spikes in the carbon dioxide trace (red) are due to measurements of reference gases with high & low levels of carbon dioxide for calibration purposes once every hour. The black line shows the wind direction measured at a height of 50 metres. Photographed at the Cape Grim Baseline Air Pollu- tion Station in Tasmania, Australia. Results at Cape Grim show that carbon dioxide levels are rising at over 1 part per million per year.

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Keywords: air, air analysis, air pollution monitoring, analysis, atmosphere, atmospheric research, cape grim, carbon dioxide, climate, climate research, co2 content, gas, greenhouse gas

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